1. Manuals
  2. Brands
  3. NAL Manuals
  4. Modem
  5. A3LA-RM
  6. User manual

NAL A3LA-RM User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
451-93156-002B
A3LA-RM User Guide
Version B
April 4, 2022
Copyright © 2021 by NAL Research Corporation
11100 Endeavor Ct., Suite 300
Manassas, Virginia 20109 USA
Phone: 703-392-1136
Email: contact@nalresearch.com

Advertisement

Table of Contents
loading

Related Manuals for NAL A3LA-RM

Summary of Contents for NAL A3LA-RM

  • Page 1 451-93156-002B A3LA-RM User Guide Version B April 4, 2022 Copyright © 2021 by NAL Research Corporation 11100 Endeavor Ct., Suite 300 Manassas, Virginia 20109 USA Phone: 703-392-1136 Email: contact@nalresearch.com...
  • Page 2 Product (including hardware, software and/or firmware) and/or the Iridium satellite to the fullest extent these damages may be disclaimed by law and whether advised of the possibilities of such damages. NAL Research is not liable for any claim made by a third party or made by you for a third party.
  • Page 3 AL3A-RM User Guide Version B EVISION ISTORY Revision Date Description 8/2/16 Initial version Added revision history Updated address 5/20/20 Updated document number Added AT^VOLB command 06/09/2021 Updated to new template; proofread. 03/08/2022 Formal release Document Number: 451-93156-002B 3 of 172...
  • Page 4 AL3A-RM User Guide Version B EFERENCE OCUMENTS The latest revisions of the NAL documents are available from the NAL Research website at https://www.nalresearch.com/support/documentation-downloads/. Reference Title Revision/Date A3LA-RM Product Information 05/03/2019 Getting Started With Model A3LA-RM (TN2012-21- 04/08/2013 V1.1) SatTerm Software Manual (TN451-94000-001A)

  • Page 5: Table Of Contents

    AL3A-RM User Guide Version B ABLE OF ONTENTS Introduction ....................... 17 Multi-interface Connector ..................19 RS232 Data Interface (Standard 9-Wire Configuration) ............. 20 RS232 Data Interface (3-Wire Configuration) ..............20 DC Power Input ........................21 Power On/Off Control ......................22 Audio Interface ........................
  • Page 6 AL3A-RM User Guide Version B On – Online ......................... 40 Qn – Quiet Mode ........................ 40 Vn – Verbose Mode ......................41 Wn – Error Correction Message Control ................41 Zn – Soft Reset ........................41 B.10 &Cn – DCD Option ........................ 41 B.11 &Dn –...
  • Page 7 AL3A-RM User Guide Version B B.37 +CMGL – List SMS Messages ....................54 B.38 +CMGR – Read SMS Message ..................... 55 B.39 +CMGS – Send SMS Message....................56 B.40 +CMGW – Write SMS Message To Memory ............... 56 B.41 +CMOD – Call Mode ......................57 B.42 +CNMI –...
  • Page 8 AL3A-RM User Guide Version B B.68 +CRC – Cellular Result Codes ....................73 B.69 +CVHU – Voice Hangup Control ..................73 B.70 +CCLK – Real-Time Clock ..................... 74 B.71 –MSVTS – DTMF Generation in Voice Call ................74 B.72 –MSVTR – DTMF Received in Voice Call ................75 B.73 –MSVLS –...
  • Page 9 AL3A-RM User Guide Version B B.100 +CLIP – Calling Line Identification Presentation ..............95 B.101 +CLIR – Calling Line Identification Restriction ..............96 B.102 +IPR – Fixed DTE Rate ......................97 B.103 +SBDWT – Short Burst Data: Write a Text Message ............97 B.104 +SBDDET –...
  • Page 10 AL3A-RM User Guide Version B B.132 ^MPTFR- Modem Power Toggle Forced Registration ............125 B.133 ^MPTNC- Modem Power Toggle Not in Data Connection ..........125 B.134 ^MSB – Motion Sensor Begin ................... 126 B.135 ^PKTS – Use Packets ......................126 B.136 ^PKTST –...
  • Page 11 AL3A-RM User Guide Version B SBD Automatic Notification Registration ................147 SBD Automatic Notification Message Reception .............. 148 SBD Automatic Notification Automatic Registration ............149 Originating a Data Call ...................... 149 Answering a Data Call ....................... 150 Disconnecting a Data Call ....................150 E.10 Coordination of +CLCC and +CPAS responses..............
  • Page 12 Figure 1: Iridium Satellite Modem A3LA-RM ................17 Figure 2: Power Input Setting for the A3LA-RM ................22 Figure 3: A3LA-RM Connected to a DPL Handset via the HRC-24-8R ........... 24 Figure 4: Location of the SIM Reader ................... 27 Figure 5: Iridium Satellite Modem A3LA-RM ................
  • Page 13 AL3A-RM User Guide Version B ABLE OF ABLES Table 1: Pin Assignment for the Multi-interface Connector ............19 Table 2: General RF Parameters ....................25 Table 3: Custom Antenna Specifications ..................25 Table 4: Numeric and Verbose Mode Formats ................39 Table 7: Standard S-Registers ....................
  • Page 14 AL3A-RM User Guide Version B CRONYM 3GPP ......3rd Generation Partnership Project AES ......Advanced Encryption Standard ASCII ......American Standard Code for Information Interchange AT .......Two-letter sequence starting a string of modem commands. The AT is intended to get the modem’s attention prior to executing a command. BIS ......Bureau of Industry and Security CTS ......Clear to send DAV ......Data After Voice...
  • Page 15 AL3A-RM User Guide Version B GSM ......Global System for Mobile Communications IMEI ......International Mobile Equipment Identification I/O ......Input/output IP ........Internet Protocol IP67 ......Ingress Protection Code 67 ISP .......Internet Service Provider ISU ......Iridium subscriber unit (modems, phones, trackers) LAN ......Local area network LBT ......L-band transceiver LCD ......Liquid-crystal display LED ......Light-emitting diode...
  • Page 16 AL3A-RM User Guide Version B TCP ......Transmission Control Protocol TDD ......Time-division duplex TDMA ......Time-division multiple access TNC ......Threaded Neill–Concelman TON ......Type of number UART......Universal asynchronous receiver-transmitter VDC ......Volts (Direct Current) VSWR ......Voltage standing wave ratio Document Number: 451-93156-002B 16 of 172...

  • Page 17: Introduction

    This user guide provides you with information on the operational features, and electrical and mechanical interfaces of the A3LA-RM. The A3LA-RM is a satellite modem comprising a 9523 L- band transceiver (LBT) with an extended input voltage range. The A3LA-RM has an internal microcontroller programmed to monitor the modem’s connectivity status to prevent hardware...
  • Page 18 AL3A-RM User Guide Version B Important: Do not disassemble the A3LA-RM for repair or services. The warranty is voided if the A3LA-RM is disassembled. Return it to NAL Research for any services. Document Number: 451-93156-002B 18 of 172...

  • Page 19: Multi-Interface Connector

    AL3A-RM User Guide Version B ULTI INTERFACE ONNECTOR The multi-interface connector is a male 25-pin miniature D-sub type that includes five interfaces—RS232, DC input power, ON/OFF control line, analog audio, and DPL. The multi- interface connector pin assignments are summarized in Table 1, which is ‘pin-to-pin’ the same as model A3LA-R, A3LA-XM, and A3LA-X.

  • Page 20: Rs232 Data Interface (Standard 9-Wire Configuration)

    19,200 bps and can be changed using the +IPR command. Note that the Ring Indicator is used by the A3LA-RM to indicate that a mobile-terminated SBD (MT-SBD) message is queued at the gateway. Application developers can monitor this pin and apply appropriate AT commands to the A3LA-RM to retrieve the MT-SBD message.

  • Page 21: Dc Power Input

    Keep cables used to supply power to the A3LA-RM as short as possible to prevent significant voltage drop, which can cause the A3LA-RM to malfunction during a data call, an SMS session, or an SBD session. Power reset by Document Number: 451-93156-002B...

  • Page 22: Power On/Off Control

    With the A3LA-RM held in the position shown in Figure 2 (DB25 connector to the left), the A3LA-RM is set for 4.0 V to +5.4 V when the red jumper is on the middle and left pins, and it is set for +5.0 V to +32 V when the jumper is on the middle and right pins.

  • Page 23: Audio Interface

    RM alternates from its current on/off state. The current drawn on the external load used to pull the A3LA-RM to GND is no more than 0.5 mA. The signal on pin 1 is considered GND when it is at 0.5 V or less.

  • Page 24: Digital Peripheral Link (Dpl)

    AL3A-RM User Guide Version B A3LA-RM Modem DPL Handset HRC-24-8R Data Kit Figure 3: A3LA-RM Connected to a DPL Handset via the HRC-24-8R (DPL) IGITAL ERIPHERAL The DPL interface is composed of two ports—a full duplex asynchronous serial link for control messages and a Pulse-code modulation (PCM) digital audio link for audio traffic.

  • Page 25: Antenna Connector

    Oscillator Stability ±1.5 ppm NAL Research offers several types of antennas for use with the A3LA-RM modem. These antennas include the fixed mast, mobile magnetic/permanent mount, and portable auxiliary. For low cost and applications where small form factor and light weight are required, NAL Research recommends model SYN7391-C.
  • Page 26 AL3A-RM User Guide Version B Satellite signal strength reported by the A3LA-RM when issuing an AT+CSQ command indicates the signal strength of the ring channel. Be careful when using this signal reading for comparisons between devices. Of particular note are the following: 1.

  • Page 27: Sim Card Interface

    4 SIM C NTERFACE The A3LA-RM modem contains an integrated Subscriber identification module (SIM) reader. The modem uses and requires an Iridium SIM chip for operation. The SIM chip is inserted into the opening located on top of the modem, as shown in Figure 4. A plastic locking mechanism is used hold the SIM in place.

  • Page 28: Led Display

    5 LED D ISPLAY The A3LA-RM has three status LEDs depicted as P for power indicator, I for Iridium satellite signal strength, and S for status (see Figure 5). They provide a quick visual check to ensure proper modem operations and a way to optimize antenna locations during field installation.

  • Page 29: Configuration Settings

    These profiles can be designated to be loaded as the active configuration upon A3LA-RM power-up through use of the AT&Yn command. o The A3LA-RM can be reset without loss of power to these profiles through use of the ATZn command.

  • Page 30: Modes Of Operation

    AL3A-RM User Guide Version B ODES OF PERATION The A3LA-RM serial data port is always in one of two modes: command mode or data mode. Command Mode When the data port is in command mode, AT commands can be entered to control the A3LA- RM.

  • Page 31: Bit Encryption

    Internet, RUDICS, SBD, and SMS. The A3LA-RM does not support encrypted voice calls. All voice calls are made in the ‘clear’ unless an external encryption module is hooked to it, such as the General Dynamics® Sectéra.

  • Page 32: Self-Monitoring To Prevent Modem Lockup

    The 9523 RF board can sometimes ‘lock up’ when inactive over a long period of time (a day or longer). The only way to recover is to power cycle the Iridium subscriber (ISU). The A3LA-RM has safeguards put in place with a watchdog timer to keep the 9523 RF board from locking up.

  • Page 33: Mounting Recommendations

    10 M OUNTING ECOMMENDATIONS The A3LA-RM has four features on its bottom surface that can aid in its mounting (see Appendix L: Mechanical Drawing). These four features are predrilled at a minimum depth of 0.25 inch to accept 6-32 thread type.

  • Page 34: Technical Support

    For technical support, please contact us at: Phone: 703-392-1136, x203 Fax: 703-392-6795 Email: contact@nalresearch.com Technical documents are also available to download on NAL Research’s website www.nalresearch.com in the Support > Documentation & Downloads section. Document Number: 451-93156-002B 34 of 172...

  • Page 35: Appendix A: At Interface

    “No action, compatibility only.” In these cases, the basic command is accepted in the same fashion as it is with other modems, but has no effect on the operation of the A3LA-RM because it has no meaning in the Iridium environment.
  • Page 36  Used for data compression  Standard: V.25ter [1] Extended Generic Commands:  +G prefix  Used for A3LA-RM issues such as identities and capabilities  Standard: V.25ter [1] Extended Interface Control Commands:  +I prefix  Used to control the DTE interface ...

  • Page 37: Command And Response Characters

    OMMAND NTRY An AT command is a string of characters sent by the DTE to the A3LA-RM while it is in command mode. A command string has a prefix, a body, and a terminator.  The prefix consists of the ASCII characters AT or at.

  • Page 38: Command Responses

    AL3A-RM User Guide Version B  If an optional parameter is omitted from an extended command, the current value is implied. Optional parameters are enclosed by square brackets ([...]) in this document.  Spaces entered into a command string for clarity between the AT prefix and the body of the command are ignored.

  • Page 39: Hardware Failure Reporting

    AL3A-RM User Guide Version B Result codes can be represented by text if the A3LA-RM is in verbose mode or with numbers if in numeric mode. The command ATVn informs the A3LA-RM whether to respond in verbose or numeric mode. Responses can be suppressed by setting the command ATQn to ATQ1. Table 4 below shows the difference in format between these modes.

  • Page 40: Appendix B: At Command Set Description

    A3LA-RM will respond OK. B.2 A/ – R EPEAT OMMAND Repeat the last command issued to the A3LA-RM unless the power was interrupted or the unit is reset. A/ is not followed by <CR>. B.3 +++ – E SCAPE EQUENCE The escape sequence is used to transfer from in-call data mode to in-call command mode without disconnecting from the remote modem.

  • Page 41: Vn - Verbose Mode

    B.11 &D – DTR O PTION Set the A3LA-RM reaction to DTR signal when auto dialing is disabled (see the ^AD command). DTR is ignored. A DTR signal input is not needed when set to &D0. If DTR transitions from ON to OFF during a data call and is not restored ON within approximately 10 seconds, the call will be dropped.

  • Page 42: Fn - Restore Factory Settings

    ACTORY ETTINGS Recall factory defaults. Recall factory default 0 B.13 &K – F ONTROL Select the flow control method between the A3LA-RM and DTE. Disables flow control Enables RTS/CTS flow control (default) B.14 &M – A SYNCHRONOUS YNCHRONOUS Select the DTR operating mode.

  • Page 43: Sn - Dsr Override

    – C ONTROL REAK Control the response of the A3LA-RM to a break received from the DTE or the remote modem according to the parameter specified. The response is different in three separate states: When a break is received from DTE when A3LA-RM is in data transfer mode:...

  • Page 44: R - Display Registers

    B.21 %R – D ISPLAY EGISTERS Display all the S registers in the system. B.22 – P OWER Turn A3LA-RM off. Turn A3LA-RM OFF B.23 +CBST – S ELECT EARER ERVICE Set Command: +CBST=[<speed>[,<name>[,<ce>]]] Select the bearer service type for mobile originated calls.

  • Page 45: Cgmi - Manufacturer Identification

    List the supported <speed>, <name>, <ce>. Response is in the form: +CBST: (supported <speed>s),(supported <name>s),(supported <ce>s) B.24 +CGMI – M ANUFACTURER DENTIFICATION Exec Command: +CGMI Query A3LA-RM RF board manufacturer. B.25 +CGMM – M ODEL DENTIFICATION Exec Command: +CGMM Query A3LA-RM RF board model.
  • Page 46 An example of an error report is: +CME ERROR: <y> where <y> can be the number or text listed below: A3LA-RM RF board failure no connection to A3LA-RM A3LA-RM RF board-adaptor link reserved operation not allowed operation not supported PH-SIM PIN required PH-FSIM PIN required...

  • Page 47: Cpas - Modem Activity Status

    +CPAS – M ODEM CTIVITY TATUS Exec Command: +CPAS Query A3LA-RM activity status. The response is in the form: +CPAS: <x> where <x> can take the following values: Ready (allows commands) Unavailable (does not allow commands) Unknown (may not respond to commands)

  • Page 48: Cr - Service Reporting Control

    Set the service reporting level. <mode> takes the following values: Disable reporting (default) Enable reporting If reporting is enabled, the intermediate result code +CR: <serv> is returned by the A3LA-RM. <serv> can have one of the following values: ASYNC asynchronous transparent SYNC...

  • Page 49: Dr - Data Compression Report Level

    AL3A-RM User Guide Version B Both directions (default) <comp_neg> can take on the following values: Do not disconnect if V.42bis is not negotiated by the A3LA-RM as specified in <direction> (default) Disconnect if V.42bis is not negotiated by the A3LA-RM as specified in <direction>...

  • Page 50: Ceer - Extended Error Report

    EPORT Exec Command: +CEER Execution command causes the A3LA-RM to return information text <report> which offers the user an extended report of the reason of the failure in the last unsuccessful call setup (originating or answering) or the reason for last call release. The response is in the form: +CEER: <report>...

  • Page 51: Cmgd - Delete Sms Message

    AL3A-RM User Guide Version B B.35 +CMGD – D SMS M ELETE ESSAGE Exec Command: +CMGD=<index> Execution command deletes message from preferred message storage <mem1> (<mem1> is the selected message storage from the +CPMS command) location <index>. If deleting fails, final result code +CMS ERROR: <cms_err> is returned. An example of an error report is: +CMS ERROR: <cms_err>...
  • Page 52 SM rejected SIM SMS storage full no SMS storage capability in SIM error in MS memory capacity exceeded unspecified error A3LA-RM failure SMS service reserved operation not allowed operation not supported invalid PDU mode parameter invalid text mode parameter no SIM...

  • Page 53: Cmgf - Sms Message Format

    ORMAT Set Command: +CMGF=[<mode>] Set command tells the A3LA-RM, which input and output format of messages to use. <mode> indicates the format of messages used with send, list, read and write commands and unsolicited result codes resulting from received messages. Mode can be either PDU mode (entire TP data units used) or text mode (headers and body of the messages given as separate parameters).

  • Page 54: Cmgl - List Sms Messages

    <pdu>: GSM 04.11 [8] SC address followed by GSM 03.40 [9] TPDU in hexadecimal format. Test Command: +CMGL=? Test command gives a list of all status values supported by the A3LA-RM. Response is in the form: +CMGL: (list of supported <stat>s)

  • Page 55: Cmgr - Read Sms Message

    AL3A-RM User Guide Version B B.38 +CMGR – R SMS M ESSAGE Exec Command: +CMGR=<index> Execution command returns the SMS message with location value <index> from message storage <mem1> (<mem1> is the selected message storage from the +CPMS command). If status of the message is ’received unread’, status in the storage changes to ’received read’.

  • Page 56: Cmgs - Send Sms Message

    AL3A-RM User Guide Version B B.39 +CMGS – S SMS M ESSAGE Exec Command: +CMGS=<length><CR><pdu><ctrl-Z/ESC> (PDU mode) Execution command sends message from the DTE to the network (SMS-SUBMIT). In PDU mode, <length> is the length of the actual TP data unit in octets; <pdu> is the GSM 04.11 [8] SC address followed by GSM 03.40 [9] TPDU in hexadecimal format.

  • Page 57: Cmod - Call Mode

    DTE when DTE is active, e.g. DTR signal is ON. Valid values for <mode> are: Buffer unsolicited result codes in the A3LA-RM. If result code buffer is full, older indications are discarded and replaced with the new received indications. (default) Discard indication and reject new received message unsolicited result codes when A3LA-RM-DTE link is reserved (e.g.
  • Page 58 AL3A-RM User Guide Version B Valid values for <mt> are: No SMS-DELIVER indications are routed to the DTE. (default) If SMS-DELIVER is stored in the A3LA-RM, indication of the memory location is routed to the DTE using unsolicited result code: +CMTI: <mem>,<index>...

  • Page 59: Cops - Operator Select

    AL3A-RM User Guide Version B Test command returns the supported settings of the A3LA-RM. Response is in the form: +CNMI: (list of supported <mode>s),(list of supported <mt>s),(list of supported <bm>s),(list of supported <ds>s),(list of supported <bfr>s) B.43 +COPS – O...

  • Page 60: Cpbf - Find Phonebook Entries

    AL3A-RM User Guide Version B Read command returns the current mode, and will always respond with “000” for <mode>. This is due to the continually enabled nature of the automatic registration mode. The response is in the form: +COPS: <mode> For example: +COPS:000 Test Command: +COPS=?

  • Page 61: Cpbr - Read Phonebook Entries

    <storage> should be of string type enclosed by “”; for example, “FD”. <storage> takes the following values: SIM fixed dialing phonebook Last ten calls dialed phonebook A3LA-RM phonebook combined A3LA-RM and SIM phonebook (default) SIM phonebook Document Number: 451-93156-002B 61 of 172...

  • Page 62: Cpbw - Write Phonebook Entry

    AL3A-RM User Guide Version B Read Command: +CPBS? Read command returns currently selected memory, the number of used locations and total number of locations in the memory. Response is in the form: +CPBS: <storage>,<used>,<total> where <used> indicates the number of used locations and <total> shows the total capacity of <storage>.

  • Page 63: Cpin - Enter Pin

    NTER Set Command: +CPIN=<pin>[,<newpin>] Set command sends to the A3LA-RM a password which is necessary before it can be operated (SIM Card PIN Code, SIM PUK, etc.). If no password request is pending, no action is taken by the A3LA-RM.

  • Page 64: Cpms - Select Preferred Sms Message Storage

    The A3LA-RM is waiting for PIN2 (used to access Fixed Dialing settings and other subscription-based features). In any of these three cases, the A3LA-RM should be available to place and receive calls. Note: +CPIN is closely related to +CLCK and +CPWD. See these commands for additional information.

  • Page 65: Creg - Network Registration

    Set Command: +CREG=[<n>] Set command controls the presentation of an unsolicited result code +CREG: <stat> when <n>=1 and there is a change in the A3LA-RM network registration status, or code +CREG: <stat>[,<lac>,<ci>] when <n>=2 and there is a change in the registration status of the A3LA-RM.

  • Page 66: Csca - Sms Service Center Address

    Read command returns the status of result code presentation and an integer <stat> which shows the network registration status of the A3LA-RM. Location information elements <lac> and <ci> are returned only when <n>=2 and A3LA-RM is registered in the network. Response is in the form: +CREG: <n>,<stat>[,<lac>,<ci>]...

  • Page 67: Cscs - Select Te Character Set

    ELECT HARACTER Set Command: +CSCS=[<chset>] Set command informs the A3LA-RM which character set <chset> is used by the DTE. Only the IRA character set is currently supported. <chset> should be of string type enclosed by ““; for example, “IRA”. Valid values for <chset> are: "IRA" international reference alphabet (ITU-T T.50) Read Command: +CSCS? Read command returns the current character set used.

  • Page 68: Csta - Select Type Of Address

    Read command returns the current message service type set. Response is in the form: +CSMS: <service>,<mt>,<mo>,<bm> Test Command: +CSMS=? Test command returns the supported message services of the A3LA-RM. Response is in the form: +CSMS: (list of supported <service>s) B.55 +CSTA –...

  • Page 69: Gmr - Revision

    B.62 D – D Dial a data or voice call number. The dial command causes the A3LA-RM to enter originate mode and act as an auto dialer for connection to other modems or voice lines. The usual format is ATDnx..x where n is a Dial Modifier and x is a number. The following are valid numbers: 0123456789*#ABC.

  • Page 70: D> - Direct Dial From Phonebook

    B.62.1 D> – D IRECT HONEBOOK The A3LA-RM and SIM contain phonebooks which have a phone number and an alphanumeric field for each phonebook entry location. The use of V.25ter dialing command ensures that direct dialing from phone memory and SIM phonebook is possible through ordinary communications software which just gives the phone number field to be filled and then uses the D command to originate the call.

  • Page 71: S0=N - Auto-Answer

    XTENDED ESULT ODES Select the response set to be used by the A3LA-RM when informing the DTE of the results of a command or data or voice call. OK, CONNECT, RING, NO CARRIER, NO ANSWER and ERROR CONNECT response is used to inform of a data call connection; OK response is used to inform of a voice call connection (only for A3LA- R/RM/RGS).

  • Page 72: Cmut - Mute Control

    AL3A-RM User Guide Version B Read Command: +CLVL? Query the current volume level settings. The response is in the form: +CLVL: <level> Equivalent to level 0 displayed on a handset’s volume indicator Equivalent to level 1 displayed on a handset’s volume indicator Equivalent to level 2 displayed on a handset’s volume indicator Equivalent to level 3 displayed on a handset’s volume indicator Equivalent to level 4 displayed on a handset’s volume indicator...

  • Page 73: Crc - Cellular Result Codes

    <mode> takes the following values: Disable extended format (default) Enable extended format If extended format is enabled, the unsolicited result code +CRING: <type> is returned by the A3LA-RM instead of RING, where <type> can be one of the following: ASYNC asynchronous transparent SYNC...

  • Page 74: Cclk - Real-Time Clock

    +CCLK – R LOCK Set Command: +CCLK=[<time>] Sets the real-time clock of the A3LA-RM. If setting fails, ERROR is returned. <time>: string type value; format is “yy/MM/dd,hh:mm:ss zz”, where characters indicate year two last digits), month, day, hour, minutes, seconds and time zone.

  • Page 75: Msvtr - Dtmf Received In Voice Call

    AL3A-RM User Guide Version B <time> specifies the duration of each tone in 180-millisecond unit. Default value is 1 for 180 ms. For example, the command string –MSVTS=1,[9,2],[5,3] will: 1. Generate DTMF 1 with a duration of 180 ms (default) 2.

  • Page 76: Msvls - Local Dtmf Feedback Selection

    Query the latest system time received from the network. The response is the form: –MSSTM: <system_time> <system_time> can take one of the following forms: no network service The A3LA-RM has not yet received system time from the network. Document Number: 451-93156-002B 76 of 172...

  • Page 77: Msgeo - Request Geolocation

    90 ms. Accuracy as measured by the difference between the time reported and the actual time this message is sent out of the A3LA-RM’ serial port should not exceed 4 frame ticks (.36 seconds) and in most cases will be one frame tick (.09 seconds) or less.

  • Page 78: Ccfc - Call Forward Service

    6376, a maximum value of +6376, and a resolution of 4. <time_stamp> is assigned by the A3LA-RM when the geolocation grid code received from the network is stored to the A3LA-RM internal memory. Current Iridium system time, which is a running count of 90 millisecond intervals, is used for the time stamp.
  • Page 79 (up to 30, in multiples of 5). When ‘no reply’ is enabled or queried, this gives the time in seconds to wait before call is forwarded. if <mode>=2 and command is successful, the A3LA-RM returns a response in the form: +CCFC:<status>,<class>[,<number>,<type>] where <status> may be as follows:...

  • Page 80: Clcc - Request Current Call Status

    TATUS Exec Command: +CLCC Returns the current call status of the A3LA-RM. The response is a comma separated list of call states. The number of call states in the response depends on the number of active call instances e.g. incoming calls and held calls.

  • Page 81: Wirlp - Iridium Radio Link Protocol

    1-105. Default is 105. <k2> represents the maximum number of sequentially numbered I frames that may be outstanding at any given time at uplink direction (A3LA-RM->IWF) and can take the following values: 1-105. Default is 105. <t1> is used to supervise the acknowledgment of transmitted unnumbered frames.
  • Page 82 AL3A-RM User Guide Version B <r1> is used to represent the maximum number of S frames that are used to acknowledge I frames at downlink direction (IWF->A3LA-RM) and can take on the following values: 1-10. Default is 10. <r2> is used to represent the maximum number of S frames that are used to acknowledge I frames at uplink direction (A3LA-RM->IWF) and can take on the...

  • Page 83: Wfrng - Force Irlp Renegotiation

    AL3A-RM User Guide Version B (supported <n2>s), (supported <t2>s), (supported <r1>s), (supported <r2s), (supported <t4>s), (supported <mode>s) B.81 +WFRNG – F IRLP R ORCE ENEGOTIATION Set Command: +WFRNG=<frng> Set forced renegotiation of IRLP parameters. <frng> can take the following values: Do not renegotiate (default) Renegotiate Disconnect...

  • Page 84: Wdldm - Irlp Dynamic Link Delay Measurement

    AL3A-RM User Guide Version B B.83 +WDLDM – IRLP D YNAMIC ELAY EASUREMENT Set Command: +WDLDM=[<dldm>[,<mi>[,<dtl>]]] Set the DCE dynamic link delay measurement parameters. <dldm> can take the following values: measurement off (default) measurement on <mi> denotes the measurement interval and can take the following values: 1-255 (in 1000-ms unit).

  • Page 85: Sbdwb - Short Burst Data: Write Binary Data

    A3LA-RM. The mobile originated buffer can contain only one message at any one time. Once the command is entered, the A3LA-RM will indicate to the DTE that it is prepared to receive the message by sending the ASCII encoded string “READY<CR><LF>” (hex 52 45 41 44 59 0D 0A) to the DTE.

  • Page 86: Sbdrb - Short Burst Data: Read Binary Data

    URST ESSAGE Exec Command: +SBDRT This command is used to transfer a text SBD message from the single mobile terminated buffer in the A3LA-RM to the DTE. This command is similar to +SBDRB but Document Number: 451-93156-002B 86 of 172...

  • Page 87: Sbdd - Short Burst Data : Clear Sbd Message Buffers

    The mobile terminated buffer will be cleared when an SBD session is initiated. Sending a message from the A3LA-RM to the ESS does not clear the mobile originated buffer. Reading a message from the A3LA-RM does not clear the mobile terminated buffer.

  • Page 88: Sbdc - Short Burst Data: Clear Sbd Momsn

    <MO flag>: The MO flag indicates the existence of a message in the mobile originated buffer. The response from the A3LA-RM is one of the following numeric codes: No message in mobile originated buffer Message in mobile originated buffer <MOMSN>: The MOMSN identifies the sequence number that will be used during the...

  • Page 89: Sbdtc - Short Burst Data: Transfer Mo Buffer To Mt Buffer

    This command will transfer the contents of the mobile originated buffer to the mobile terminated buffer. Developers of DTE can use this command to test reading and writing to the A3LA-RM without actually initiating SBD sessions with the ESS. Command Response:...

  • Page 90: Cier - Indicator Event Reporting

    EPORTING Set Command: +CIER=[<mode>[,<sigind>[,<svcind>]]] The set command enables or disables sending of the +CIEV unsolicited result code by the A3LA-RM in case of indicator state changes. <mode> controls the processing of the +CIEV unsolicited result codes. <mode>: Disable indicator event reporting; do not send +CIEV unsolicited result codes to the DTE;...
  • Page 91 Network service availability is equivalent to a signal strength greater than 0. The service availability indicator provides a way for the DTE to wait until the A3LA-RM can start an SBD session without receiving continual notifications of changes in signal strength.

  • Page 92: Cris - Ring Indication Status

    +CSQ[F] – S IGNAL UALITY Exec Command: +CSQ[F] Execution command returns the received signal strength indication <rssi> from the A3LA-RM. Response is in the form: +CSQ: <rssi> where <rssi> is: Equivalent to 0 bars displayed on the signal strength indicator...

  • Page 93: Culk - Unlock

    10 seconds may be experienced. If the A3LA-RM has no SIM, is awaiting a SIM PIN entry, has an invalid SIM, or has otherwise not proceeded to successful registration, the delay in response may exceed the 50 second timeout limit.

  • Page 94: Cvmi - Voicemail Indication

    Permanently locked – A3LA-RM is locked and unable to perform SBD sessions. It cannot be unlocked and must be returned to the supplier. Read Command: +CULK? Query the current SBD lock status of the A3LA-RM. The response is of the form: +CULK:<status> <status>:...

  • Page 95: Ciccid - Read Icc Id From Sim

    DENTIFICATION RESENTATION Exec Command: +CLIP=<n> Note: While this command is implemented in the A3LA-RM, it may not yet be supported in the Iridium network. Stand by for an Iridium Technical Bulletin announcing network support for this feature. This command controls the presentation of the Calling Line Identity of the calling party in a mobile terminated call via the +CLIP unsolicited result code.

  • Page 96: Clir - Calling Line Identification Restriction

    DENTIFICATION ESTRICTION Exec Command: +CLIR=<n> Note: While this command is implemented in the A3LA-RM, it may not yet be supported in the Iridium network. Stand by for an Iridium Technical Bulletin announcing network support for this feature. This command controls the presentation of the Calling Line Identity of the calling party to the called party in the next mobile originated call.

  • Page 97: Ipr - Fixed Dte Rate

    DTE R IXED Set Command: +IPR=<rate>[,<autoflag>] Set the data rate at which the A3LA-RM will accept commands. The change in data rate takes effect after the result code (e.g. OK) is received by the DTE. <rate> takes the following values:...

  • Page 98: Sbddet - Short Burst Data: Detach

    The message is terminated when a carriage return is entered Alternatively, the text message may be entered separately: Upon entering the command “AT+SBDWT”, the A3LA-RM will indicate to the DTE that it is prepared to receive the message by sending the string “READY<CR><LF>” (hex 52...
  • Page 99 36.. Reserved, but indicate failure if used This instructs the GSS to disable (detach) SBD ring alerts for the calling A3LA-RM. Successful completion of the detach command implies that the GSS has performed the requested detach action and the A3LA-RM is no longer registered for SBD ring alerts.

  • Page 100: Sbdi - Short Burst Data: Initiate An Sbd Session

    The message, if any, in the mobile originated buffer will be sent from the A3LA-RM to the GSS If there is a message queued at the GSS it will be transferred to the A3LA-RM and placed into the mobile terminated buffer Command Response: +SBDI:<MO status>,<MOMSN>,<MT status>,<MTMSN>,<MT length>,<MT queued>...

  • Page 101: Sbdix[A] - Short Burst Data: Initiate An Sbd Session Extended

    <MTMSN>: The Mobile Terminated Message Sequence Number (MTMSN) is assigned by the GSS when forwarding a message to the A3LA-RM. This value is indeterminate if the field <MT status> is zero. This wraparound counter can range from 0 to 65535.
  • Page 102 The message, if any, in the mobile originated buffer will be sent from the A3LA-RM to the GSS If there is a message queued at the GSS it will be transferred to the A3LA-RM and placed into the mobile terminated buffer This command will always attempt an SBD registration, consisting of attach and location update, during the SBD session in order to support SBD Ring Alert.
  • Page 103 A3LA-RM is busy, unable to initiate call 36.. Reserved, but indicate failure if used <MOMSN>: The Mobile Originated Message Sequence Number (MOMSN) is a value assigned by A3LA-RM when sending a mobile-originated message to the GSS. This Document Number: 451-93156-002B 103 of 172...

  • Page 104: Sbddsc - Short Burst Data: Delivery Short Code

    <MTMSN>: The Mobile Terminated Message Sequence Number (MTMSN) is assigned by the GSS when forwarding a message to the A3LA-RM. This value is indeterminate if the field <MT status> is zero. This wraparound counter can range from 0 to 65535.

  • Page 105: Sbdmta - Short Burst Data: Mobile-Terminated Alert

    <status>: Disable ring indication Enable ring indication (default) When SBD ring indication is enabled, the A3LA-RM asserts the RI line and issues the unsolicited result code SBDRING when an SBD ring alert is received. Read Command: +SBDMTA? Query the current ring indication mode. The response is of the form: +SBDMTA:<mode>...
  • Page 106 Degrees longitude (000-179) Minutes longitude (00-59) mmm Thousandths of minutes longitude (000-999) This command initiates an SBD session between the A3LA-RM and the GSS, setting the SBD Session. The optional sign indicators specify latitude North (+) or South (-), and longitude East (+) or West (-).
  • Page 107 A3LA-RM is busy, unable to initiate call Try later, must wait 3 minutes since last registration 37.. Reserved, but indicate failure if used Read Command: +SBDREG? Query the current SBD registration status of the A3LA-RM. The response is of the form: +SBDREG:<status> <status>: Detached...

  • Page 108: Sbdareg - Short Burst Data: Automatic Registration

    SBD auto-registration when it determines that it has moved sufficiently far away from its last registered location. Note that auto-registration runs only while the A3LA-RM is attached to the GSS, i.e. the registration status is “Not registered” or “Registered”.
  • Page 109 Session completed but the requested Location Update was not accepted 3..14 Reserved, but indicate Location Update failure if used Access is denied A3LA-RM-reported values: A3LA-RM has been locked and may not make SBD calls (see +CULK command) Gateway not responding (local session timeout) Connection lost (RF drop) Link failure (A protocol error caused termination of the call) 20..31 Reserved, but indicate failure if used...

  • Page 110: Sbdsx - Short Burst Data: Status Extended

    No SBD ring alert SBD ring alert has been received and needs to be answered Note: The RA flag is set whenever the A3LA-RM receives an SBD ring alert; this happens even if the +SBDMTA setting specifies that SBD ring indications are disabled.

  • Page 111: Ccwa - Call Waiting Service

    Unsolicited result notifying that a call is waiting +CCWA:<number>,<type>,<class> Note: While this command is implemented in the A3LA-RM, it may not yet be supported in the Iridium network. Stand by for an Iridium Technical Bulletin announcing network support for this feature.
  • Page 112 GSM supplementary services is described in the GSM standard. Defined values <n> (sets/shows the result code presentation status in the A3LA-RM): disable unsolicited result presentation enable unsolicited result presentation On a DTE-DCE command, <n> will set the result code presentation status in the A3LA-RM, regardless of the value of any <mode>...

  • Page 113: Clck - Facility Lock

    +CCWA:1,1 If a remote caller tries to place a voice call to the A3LA-RM while it already has a call in progress, and the Call Waiting service has been made active for class Voice, then the network will send a message to the A3LA-RM. Then, if <n> has previously been set to ‘1’, the A3LA-RM will send an unsolicited result code to the DTE, e.g.:...
  • Page 114 Execute command is used to activate or deactivate Call Barring Supplementary Services, SIM Fixed Dialling feature, the SIM card PIN Code, or to enable or disable the Phone Lock feature in the A3LA-RM. A password code (detailed below) may be required, depending on the action chosen.
  • Page 115 AL3A-RM User Guide Version B "AB" All Barring services (refer GSM 02.30 [5]) (applicable only for <mode>=0). The Call Barring password is required as <passwd>. Note: Several GSM standard facility codes including the following are NOT supported: "OI" BOIC (Bar Outgoing International Calls) (refer GSM 02.88 [4] clause 1). All Iridium calls are International, so this facility should not be exercised by a user interface.

  • Page 116: Cpwd - Change Password

    AL3A-RM User Guide Version B This parameter defaults to 7, equal to all classes, but the A3LA-RM only supports Voice Call Barring so this is illegal. Therefore in practice the DTE must supply <classx>=1 when querying or changing the status of any Call Barring facility. When querying (<mode>=2), <passwd>...

  • Page 117: Csdt - Sidetone

    Exec Command: +CSDT=<sidetone enabled> This command controls the A3LA-RM RF board sidetone generation. Enabling sidetone will cause the A3LA-RM to start sidetone generation. Disabling sidetone will cause the A3LA-RM to stop sidetone generation. The following parameter values are currently supported: <...
  • Page 118 AL3A-RM User Guide Version B Exec Command: none Unsolicited Announcement: +CDSI:<status> where: <status>: 0..255 Success code or failure cause (TD_SMS_RP_CAUSE_*) Unassigned Number Operator Barring Call Barred SM Transfer Rejected Memory Capacity Exceeded Destination Out Of Order Unidentified Subscriber Facility Rejected Unknown Subscriber Network Out Of Order Temporary Failure...

  • Page 119: Gpssta - Configure Gps Status

    Iridium band transmitter and the GPS band receiver. Note: the GPS receiver (and associated circuitry) is optional and is not fitted to some revisions of the A3LA-RM RF board. In this case all forms of the +GPSSTA command will return an error.

  • Page 120: Ploc - Gps: Display Position To

    DTR line is brought high again. While in auto dial mode, the A3LA-RM will not respond to AT commands. Instead, the A3LA-RM will continuously dial the number that is setup for auto dialing. The ^ADR command controls the retry delay in between dial attempts.

  • Page 121: Adr - Auto Dial Retry

    The password will not be reset by AT command &F. When the A3LA-RM is set to echo, all entries are replaced with asterisks (*) instead of the actual typed value. All passwords must be between 8 and 16 characters in length.

  • Page 122: Ffw - Flash Firmware

    AL3A-RM User Guide Version B B.125 ^FFW – F LASH IRMWARE Exec Command: ^FFW Puts the firmware into flashing mode B.126 ^KD – K EY FOR ECRYPTION NCRYPTION Exec Command: ^KD=<password>,<key> Allow entering the 32 bytes for the AES decryption key. These bytes must be entered with mandatory leading 0s, where each byte is represented by 2 hexadecimal uppercase characters for a total of 64 digits.

  • Page 123: Kz - Key Zeroization (Encryption)

    AL3A-RM User Guide Version B NOTE: The Encryption key must match the Decryption key at the base station or NOC. <password>: The Crypto Officer Password must be enclosed by two single quotes (‘ ‘). The Crypto Officer Password must be changed from its factory-set value before this command will work.

  • Page 124: Mptfp- Modem Power Toggle Forced Power-Cycle

    AL3A-RM User Guide Version B 0 Disable the MPT functionality during a data call. 1 Enable the MPT functionality during a data call. Read Command: ^MPTDC? Query the current modem power toggle data connection mode. The response is in the form: ^MPTDC: <mode>...

  • Page 125: Mptfr- Modem Power Toggle Forced Registration

    AL3A-RM User Guide Version B B.132 ^MPTFR- M ODEM OWER OGGLE ORCED EGISTRATION Exec Command: ^MPTFR = [<mode>] Enable or disable the modem power toggle forced registration functionality. Every hour the modem will attempt to find a period of inactivity to make a registration. If it cannot find a period of inactivity, it will retry a set number of times, after which it will force a registration.

  • Page 126: Msb - Motion Sensor Begin

    AL3A-RM User Guide Version B Read Command: ^MPTNC? Query the current modem power toggle not data connection mode. The response is in the form: ^MPTNC: <mode> Test Command: ^MPTNC=? List the supported modem power toggle not data connection modes. The response is in the form: ^MPTNC: (supported <mode>s) B.134 ^MSB –...

  • Page 127: Pktst - Packet Send Timer

    AL3A-RM User Guide Version B Use packets Use streaming encryption Read Command: ^PKTS? Query the current setting if the unit will use packets. Response is in the form: ^PKTS: <pkts> Test Command: ^PKTS=? List the supported <pkts> Response is in the form: ^PKTS: (supported <pkts>s) B.136 ^PKTST –...

  • Page 128: Pktth - Packet Send Threshold

    AL3A-RM User Guide Version B Read Command: ^PKTRT? Query the current value of the packet resend timeout delay. Response is in the form: ^PKTRT: <pktrt> Test Command: ^PKTRT=? List the supported <timer> Response is in the form: ^PKTRT: (supported <timer>s) B.138 ^PKTTH –...

  • Page 129: Rle - Use Run Length Encoding

    AL3A-RM User Guide Version B B.141 ^RLE – U ENGTH NCODING Exec Command: ^RLE=<rle> Set the modem to utilize run length encoding for data transfers. <rle> can have the following values: Do not use run length encoding Use run length encoding Read Command: ^RLE? Query the current setting if the unit will use packets.

  • Page 130: Smsd - Sms Delete

    AL3A-RM User Guide Version B ^SE: =<imei>,<blocks>,<timeout> Test Command: ^SE=? Test command returns lists of memory storages supported by the A3LA-RM. Response is in the form: ^SE: (list of supported <imei >s),(list of supported <blocks>s), (list of supported <timeout>s) mand following the AT.

  • Page 131: Ssi - Send Start-Up Information

    AL3A-RM User Guide Version B B.146 ^SSI – S TART NFORMATION Exec Command: ^SSI=<n> This command sets whether or not to display the start-up information. <n>: 0 Do not display the start-up information 1 Display the start-up information Read Command: ^SSI? Returns the current value Test Command: ^SSI=? Returns a fixed message indicating the range of acceptable values.

  • Page 132: Volb - Volume Boost

    AL3A-RM User Guide Version B (“Encryption Currently Enabled” OR “Encryption Currently Disabled”) AND ("Set to be Enabled Next Power Cycle" OR "Set to be Disabled Next Power Cycle") "Encryption Feature Not Included" B.149 ^VOLB – V OLUME OOST Exec Command: ^VOLB=<n> This command controls the volume boost function.

  • Page 133: Appendix C: S-Register Definitions

    AL3A-RM User Guide Version B C: S-R PPENDIX EGISTER EFINITIONS S-registers allow control over specific A3LA-RM operations. Some S-registers contain a single numeric value. Other S-registers are bit mapped where individual bits, or sets of bits, control specific functions. EGISTER OMMANDS Commands allow S-registers to be read, written, or simply referenced (i.e., set a pointer to...

  • Page 134: Standard S-Registers

    AL3A-RM User Guide Version B TANDARD EGISTERS Table 5: Standard S-Registers Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 0 – 127 13 Carriage return character 0 – 127 10 Line feed character 0 – 32 Backspace character Wait for dial tone 0 –...
  • Page 135 AL3A-RM User Guide Version B Table 5: Standard S-Registers Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 Bitmap register where bit 0 reflects telephone jack control, bit 2 reflects RTS/CTS on/off, bits 3 and 4 reflect the 0 – 255 48 &Dn setting, bit 5 reflects the &Cn setting, bit 6 reflects DSR on/off, and bit 7 reflects disconnecting long space.
  • Page 136 AL3A-RM User Guide Version B Table 5: Standard S-Registers Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 Bitmap register where bits 0, 1, and 2 reflect the link type setting. 0 – 255 7 No action, compatibility only Bitmap register where bits 0, 1 and 2 0 –...

  • Page 137: Iridium Specific S-Register Extensions

    AL3A-RM User Guide Version B RIDIUM PECIFIC EGISTER XTENSIONS Table 6: Iridium Specific S-Register Extensions Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 Bitmap register where bits 0–1 reflect the DCE data bits, bits 2–3 reflect the 0 – 255 DCE stop bits, bits 4–6 reflect the DCE parity settings, and bit 7 is not used.
  • Page 138 AL3A-RM User Guide Version B Table 6: Iridium Specific S-Register Extensions Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 Bitmap register: 0–2 = +CPBS setting 0 – 255 5-6 = +CREG setting 7 = +CLIP setting Bitmap register: 0–1 = +CNMI parameter <mode>...
  • Page 139 AL3A-RM User Guide Version B Table 6: Iridium Specific S-Register Extensions Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 S104 4 – 255 IRLP T4 parameter S106 1 – 10 IRLP riwf->isu parameter S107 1 – 10 IRLP risu->iwf parameter SBD upload message sequence number S112 0 –...
  • Page 140 AL3A-RM User Guide Version B Table 6: Iridium Specific S-Register Extensions Sr=n Command Register Range Default Description Write-Protected Number in SAC0201 Dynamic link delay measurement delay S125 1 – 100 tolerance (+WDLM<dtl> setting). Value in % unit. Bitmap register: 0 = Ignore &Dn command specified reaction to DTR ON to OFF transitions.

  • Page 141: Appendix D: Summary Of Result Codes

    AL3A-RM User Guide Version B D: S PPENDIX UMMARY OF ESULT ODES The following tables list the result codes returned by the A3LA-RM. Table 7: V.25ter/Hayes Result Codes Numeric Verbose (V1) Description (V0) Acknowledges execution of command; voice call ‘OK’...
  • Page 142 AL3A-RM User Guide Version B Table 7: V.25ter/Hayes Result Codes Numeric Verbose (V1) Description (V0) ‘CONNECT 115200’ Data call connection established at 115200 bps. ’CARRIER 300’ Data rate detected at 300 bps. ’CARRIER 1200/75‘ Data rate detected at V.23 backward channel. ’CARRIER 1200’...

  • Page 143: Table 10: Gsm 7.07 Result Codes

    AL3A-RM User Guide Version B Table 8: GSM 7.07 Result Codes Numeric Verbose (V1) Description (V0) as verbose ‘+CR: ASYNC’ Asynchronous transparent data connection as verbose ‘+CR: REL ASYNC’ Asynchronous nontransparent data as verbose ‘+CME ERROR: <error> Command not accepted ‘+CREG: Registration indication status (unsolicited if as verbose...

  • Page 144: Table 12: Iridium Specific Result Codes

    AL3A-RM User Guide Version B Table 10: Iridium Specific Result Codes Numeric Verbose (V1) Description (V0) Ready to receive SBD binary message data as verbose ‘READY’ from DTE. as verbose ‘+AREG:<event>,<reg error>’ Auto-registration event report. as verbose ‘+CIEV:<sig><value>’ Indicator event report. as verbose '+ADJANT:<deployed>' User antenna adjustment is required.

  • Page 145: Appendix E: Informative Examples

    When beginning to build a communication link, a general DTE application controlling the A3LA- RM should confirm the type of Iridium device to which it is connected. Table 11: Unit Identification To A3LA-RM (from DTE) To DTE (from A3LA-RM) Description...

  • Page 146: Setting The Default Configuration

    SBD M OWER ON TO ENDING AN ESSAGE The DTE will power up the A3LA-RM, wait for the A3LA-RM to acquire the network, and send a 70-byte message. Table 13: Sending an SBD Message To A3LA-RM (from To DTE (from...

  • Page 147: Sbd Automatic Notification Registration

    Tell the A3LA-RM to register for automatic AT+SBDREG notifications +SBDREG: 2,0 A3LA-RM is now registered AT+SBDREG? Query the A3LA-RM registration status +SBDREG: 2 A3LA-RM is registered AT+SBDMTA=1 Enable SBD ring indications from A3LA-RM to DTE Document Number: 451-93156-002B 147 of 172...

  • Page 148: Sbd Automatic Notification Message Reception

    RI line also toggles. DTE initiates an SBD session in answer to the AT+SBDIXA automatic notification A3LA-RM informs DTE that a 90-byte message was successfully received with MTMSN 237, +SBDIXA:0,23,1,237,90,2 and that two further MT messages are queued at the GSS...

  • Page 149: Sbd Automatic Notification Automatic Registration

    A3LA-RM is registered AT+SBDAREG=2 DTE sets the automatic registration to “Ask” mode … A3LA-RM is moved +AREG: 0, 0 A3LA-RM notifies DTE that it needs to register AT+SBDREG DTE instructs the A3LA-RM to register +SBDREG: 2, 0 Registration is successful RIGINATING A...

  • Page 150: Answering A Data Call

    Call connected at DTE rate of 9600 CONNECT ASYNC 9600 NSWERING A The A3LA-RM is capable of accepting mobile-terminated data calls. The following is a sequence of commands that can be used to establish the connection. Table 18: Answering a Data Call...

  • Page 151: Coordination Of +Clcc And +Cpas Responses

    OORDINATION OF RESPONSES In order to determine the call state of the A3LA-RM, the +CLCC and +CPAS commands may be used. The following table demonstrates how the output of the two commands, as well as the Extended Ring Message, can be combined to provide a more detailed definition of the call state than any one of the results provides by itself.
  • Page 152 AL3A-RM User Guide Version B Table 20: Coordination of +CLCC and +CPAS Responses +CPAS Extended Ring Call State +CLCC Response Response Message command ATD dialing – Data command aborts call aborts call Alerting after ATD command command aborts call dialing – Voice aborts call Alerting after ATD command...

  • Page 153: Appendix F: Power Consumption

    The A3LA-RM can be connected to a DPL handset through an HRC-24-8R data kit to make voice calls. The DPL handset requires 12 V, which is supplied by the A3LA-RM through pin 2 of the multi-interface connector. When the DPL handset is on with the backlight turned on, the DPL handset current drawn is about 350 mA at 12 V or about 500 mA at 5 V.

  • Page 154: Figure 6: Average Current Drawn During Standby

    AL3A-RM User Guide Version B 0.20 4.0V to 5.5V 5.0V to 32V 0.15 0.10 0.05 0.00 Voltage (DC) Figure 6: Average Current Drawn During Standby 1.25 4.0V to 5.5V 5.0V to 32V 1.00 0.75 0.50 0.25 Voltage (DC) Figure 7: Average Power Consumption During Standby Document Number: 451-93156-002B 154 of 172...

  • Page 155: Figure 8: Average Current Drawn During Standby With Dpl Handset

    AL3A-RM User Guide Version B 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 8: Average Current Drawn During Standby with DPL Handset 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 9: Average Power Consumption During Standby with DPL Handset Document Number: 451-93156-002B 155 of 172...

  • Page 156: Figure 10: Average Current Drawn During A Data Switch Call

    AL3A-RM User Guide Version B 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 10: Average Current Drawn During a Data Switch Call 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 11: Average Power Consumption During a Data Switch Call Document Number: 451-93156-002B 156 of 172...

  • Page 157: Figure 12: Average Current Drawn During An Sbd Transmission

    AL3A-RM User Guide Version B 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 12: Average Current Drawn During an SBD Transmission 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 13: Average Power Consumption During an SBD Transmission Document Number: 451-93156-002B 157 of 172...

  • Page 158: Figure 14: Average Current Drawn During An Sms Transmission

    AL3A-RM User Guide Version B 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 14: Average Current Drawn During an SMS Transmission 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 15: Average Power Consumption During an SMS Transmission Document Number: 451-93156-002B 158 of 172...

  • Page 159: Figure 16: Average Current Drawn During A Voice Call Using Dpl Handset

    AL3A-RM User Guide Version B 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 16: Average Current Drawn During a Voice Call Using DPL Handset 4.0V to 5.5V 5.0V to 32V Voltage (DC) Figure 17: Average Power Consumption During a Voice Call Using DPL Handset Document Number: 451-93156-002B 159 of 172...

  • Page 160: Appendix G: The Iridium Network

    AL3A-RM User Guide Version B G: T PPENDIX RIDIUM ETWORK The Iridium satellite network is owned and operated by Iridium Communications Inc. It is constructed as a constellation of 66 satellites in low-earth orbit (LEO), terrestrial gateways, and Iridium subscriber units (ISUs). An ISU can either be an Iridium satellite phone or various types of modems.

  • Page 161: Iridium Network Data Capabilities

    AL3A-RM User Guide Version B beams are shut down. The satellite footprint is approximately 4,700 km in diameter. Under each footprint, a satellite is power-limited to approximately 1,100 simultaneous circuits. The Iridium network uses a time division duplex (TDD) method and transmits and receives in an allotted time window within the frame structure.

  • Page 162: Dial-Up Data Service

    AL3A-RM User Guide Version B Figure 19: Iridium Network Data Capabilities G.2 D ERVICE Dial-up data service provides connectivity through the Iridium satellite network to another Iridium modem, to the public switched telephone network (PSTN), to the Defense Switch Network (DSN), to a remote LAN (e.g., a corporate network), or to an internet service provider (ISP) at a nominal data rate of 2.4 kilobits per second (kbps).

  • Page 163: Figure 20: Pstn Dial-Up Connectivity

    AL3A-RM User Guide Version B to a specific modem with a phone number to dial, user identification, and password. The modem can then be used to call another computer, a remote Local area network (LAN), or an Internet service provider(ISP), as shown in Figure 20. The handshaking and protocols are established between the modems independent of the landline.

  • Page 164: Direct Internet Connection

    AL3A-RM User Guide Version B Figure 21: Iridium Dial-up Data Service IRECT NTERNET ONNECTION The Iridium Direct Internet service allows users to connect to the internet via the Iridium gateway without having to sign up with an internet service provider. This service utilizes a dedicated Apollo Server at the Iridium gateway, which provides high-speed connectivity to the internet and optimizes server-to-Iridium modem communications.

  • Page 165: Short Burst Data

    AL3A-RM User Guide Version B effective data throughput is achieved through the use of user-transparent data compression. The channel rate is still 2.4 kbps. However, 10 kbps effective throughput can be achieved depending on content (graphics and images result in lower effective throughput). G.4 S HORT URST...

  • Page 166: Rudics

    AL3A-RM User Guide Version B SMSC. Unlike standard GSM, the Iridium SMS can only acknowledge that the message was delivered to the SMSC and not the end destination. SMS messages can be sent and received simultaneously while a voice call is in progress. This is possible because SMS messages travel over and above the radio channel using the signaling path, whereas the voice call uses a dedicated “traffic”...

  • Page 167: Appendix H: Standards Compliance

    TANDARDS OMPLIANCE The A3LA-RM comprises an Iridium 9523 L-band transceiver board. The 9523 is a regulatory approved daughter module transceiver that can be fitted within an enclosed host system. The 9523 is designed to comply with the standards for Radio Emissions Compliance, Electromagnetic Compatibility, and AC Safety in the United States, European Union, and Canada, assuming an antenna with a gain of ~3 dBi and adequate shielding.

  • Page 168: Appendix I: Mil-Std-810G Certification

    AL3A-RM User Guide Version B I: MIL-STD-810G C PPENDIX ERTIFICATION Figure 22: Mil-STD-810G Certification Document Number: 451-93156-002B 168 of 172...

  • Page 169: Appendix J: Export Compliance

    The A3LA-RM is controlled by the export laws and regulations of the United States of America (USA). It is the policy of NAL Research to fully comply with all U.S. export and economic sanction laws and regulations. The export of NAL Research products, services, hardware, software and technology must be made only in accordance with the laws, regulations and licensing requirements of the U.S.

  • Page 170: Appendix K: Design Specifications

    Average data call current: ..........~400 mA @ 5.0 VDC (peak of 2 A) Note: The power requirements apply to DC power measured at the A3LA-RM multi-interface connector input. The average data call current may vary depending on the field of view between the modem antenna and the Iridium satellite.

  • Page 171: Environmental Specifications

    AL3A-RM User Guide Version B NVIRONMENTAL PECIFICATIONS Operating temperature range: ........–30°C to +70°C (–22°F to +158°F) Operating humidity range: .........< 75% RH Storage temperature range: ........–40°C to +85°C (–40°F to +185°F) Storage humidity range: ..........< 93% RH I/O S PECIFICATIONS Dial-up data/RUDICS: ..........2.4 kbps (average) Direct Internet: ............2.4 kbps (average) Short-burst data: ............1960 bytes for mobile-originated and 1890...

  • Page 172: Appendix L: Mechanical Drawing

    93156-002B L: M PPENDIX ECHANICAL RAWING Figure 23: A3LA-RM Mechanical Drawing Document Number: 451-93156-002A.1 172 of 172...

Table of Contents