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Symbol CRD 1500 Programmer's Manual

Symbol CRD 1500 Programmer's Manual

Modem/charging cradle
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CRD 1500
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Programmer's Guide

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  • Page 1 CRD 1500 Modem/Charging Cradle Programmer’s Guide...
  • Page 2 CRD 1500 Modem/Charging Cradle Programmer’s Guide 72E-52775-01 Revision A — May 2001 Symbol Technologies, Inc. One Symbol Plaza, Holtsville N.Y. 11742...
  • Page 3 CRD 1500 Modem/Charging Cradle Programmer’s Guide 72E-52775-01 Revision A May 2001...
  • Page 4 The software is provided strictly on an “as is” basis. All software, including firmware, furnished to the user is on a licensed basis. Symbol grants to the user a non-transferable and non-exclusive license to use each software or firmware program delivered hereunder (licensed program).

  • Page 5: Table Of Contents

    Symbol Support Centers ........
  • Page 6 CRD 1500 Modem/Charging Cradle Programmer’s Guide &Gn, Select Guard Tone ........... . 1-18 &Mn, Asynchronous/Synchronous Mode Selection .
  • Page 7 Contents S26, RTS to CTS Delay ........... . 2-15 S28, Bit Mapped Options Status .
  • Page 8 CRD 1500 Modem/Charging Cradle Programmer’s Guide...

  • Page 9: About This Guide

    About This Guide Introduction The CRD 1500 Modem/Charging Cradle Programmer’s Guide provides information necessary for developing applications for the SPT 1500/1550 using the SPT 1500 Modem/ Charging Cradle. Notational Conventions This document uses these conventions: • “terminal” refers to both the SPT 1500 and SPT 1550.

  • Page 10: Service Information

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Service Information If you have a problem with your equipment, contact the Symbol Support Center. If your problem cannot be resolved over the phone, you may need to return your equipment for servicing. If that is necessary, you will be given special directions.
  • Page 11 About This Guide Australia Austria Symbol Technologies Pty. Ltd. Symbol Technologies Austria GmbH 432 St. Kilda Road Prinz-Eugen Strasse 70 Melbourne, Victoria 3004 Suite 3 1-800-672-906 (Inside Australia) 2.Haus, 5.Stock +61-3-9866-6044 (Outside Australia) 1040 Vienna, Austria 1-505-5794 (Inside Austria) +43-1-505-5794 (Outside Austria)
  • Page 12 11-4405668 (Inside South Africa) +27-11-4405668 (Outside South Africa) Sweden Symbol Technologies AB Albygatan 109D Solna Sweden 84452900 (Inside Sweden) +46 84452900 (Outside Sweden) If you purchased your Symbol product from a Symbol Business Partner, contact that Business Partner for service.

  • Page 13: Warranty

    This warranty is provided to the original owner only and is not transferable to any third party. It shall not apply to any product (i) which has been repaired or altered unless done or approved by Symbol, (ii) which has not been maintained in accordance with any operating or handling instructions supplied...
  • Page 14 CRD 1500 Modem/Charging Cradle Programmer’s Guide Seller’s liability for damages to buyer or others resulting from the use of any product, shall in no way exceed the purchase price of said product, except in instances of injury to persons or property.

  • Page 15: Chapter 1. At Command Set

    Chapter 1 AT Command Set Introduction The Symbol MCDA Modem Card is used internally within the CRD1500-1000MC and CRD1500-1000EU. The 14.400kbps (V32bis) modem has additional Data Compression (MNP5, V42bis) for faster throughput to take advantage of the higher serial port speeds to the SPT1500. Error Correction (MNP4, V42) is also included.

  • Page 16: At Commands

    CRD 1500 Modem/Charging Cradle Programmer’s Guide AT Commands A/, Re-execute Command Description The modem behaves as if the DTE has re-sent the last command line. “A/” repeats all commands in the command buffer. This command re-executes a call (using the Dial command) that failed to connect due to a busy line, no answer, or a wrong number, and must appear alone on a command line.

  • Page 17: Bn, Ccitt Or Bell

    AT Command Set Bn, CCITT or Bell Description When configured to allow either option, the modem selects Bell or CCITT modulation for a line speed connection of 300 or 1200 bps according to the parameter supplied. Any other line speed uses a CCITT modulation standard. The parameter value, if valid, is written to S27 bit 6.
  • Page 18 CRD 1500 Modem/Charging Cradle Programmer’s Guide Dn, Dial Description Directs the modem to go on-line, dial according to the string entered, and attempt to establish a connection. If no dial string is supplied, the modem goes on-line and attempts the handshake in originate mode.

  • Page 19: En, Command Echo

    AT Command Set Wait for silence: the modem waits for at least 5 seconds of silence in the call progress frequency band before continuing with the next dial string parameter. If the modem does not detect the silence before the expiration of the call abort timer (S7), the modem terminates the call attempt with a NO ANSWER message.

  • Page 20: Fn, Select Line Modulation

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Fn, Select Line Modulation Description Selects the line modulation according to the parameter supplied. The line modulation is fixed unless Automode is selected. This command interacts with the S37 and the N command. The parameter value, if valid, is written to S37 bits 0-4.

  • Page 21: Hn, Disconnect (Hang-Up)

    AT Command Set connection at the Rockwell proprietary 7200 V.32 speed, e.g., with a RC9696/ 12 based modem. Selects V.32 bis 9600 or V.32 9600 as the only acceptable line modulations for a subsequent connection. Sets N0, sets S37 to 9, and clears S31 bit 1. This command is equivalent to command string ATN0S37=9.
  • Page 22 CRD 1500 Modem/Charging Cradle Programmer’s Guide Nn, Automode Enable Description Enables or disables automode detection. The parameter value, if valid, is written to S31 bit Disables automode detection (equivalent to setting the +MS <automode> subparameter to 0). A subsequent handshake is conducted according to the contents of S37 or, if S37 = 0, according to the most recently sensed DTE speed.

  • Page 23: P, Set Pulse Dial Default

    AT Command Set On, Return to On-Line Data Mode Description Determines how the modem enters the on-line data mode. In the on-line command mode, the modem enters the on-line data mode with or without a retrain. In the off-line command mode (no connection), ERROR is reported.

  • Page 24: Sn, Read/Write S-Register

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Qn, Quiet Result Codes Control Description Enables or disables the sending of result codes to the DTE according to the parameter supplied. The parameter value, if valid, is written to S14 bit 2. Enables result codes to the DTE (default)

  • Page 25: T, Set Tone Dial Default

    AT Command Set In some cases, writing to the S-Register appears to be accepted but the value is not written. Some commands are accepted, but the value may be limited and replaced by a maximum or minimum value. T, Set Tone Dial Default Description Forces DTMF dialing until the next P dial modifier or P command is received.

  • Page 26: Xn, Extended Result Codes

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Wn, Connect Message Control Description Controls the format of CONNECT messages. The parameter value, if valid, is written to S31 bits 2 and 3. Note that register S95 bits can override the Wn command (see...
  • Page 27 AT Command Set Disables monitoring of busy tones; send only OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and CONNECT XXXX (XXXX = rate). If busy tone detection is enforced and busy tone is detected, NO CARRIER is reported instead of BUSY. If dial tone detection is enforced or selected and dial tone is not detected, NO CARRIER is reported instead of NO DIALTONE.
  • Page 28 CRD 1500 Modem/Charging Cradle Programmer’s Guide Table 1-1. Result Codes (continued) n Value in ATXn Command Short Form Long Form RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 0600 CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 7200...
  • Page 29 AT Command Set Table 1-1. Result Codes (continued) n Value in ATXn Command Short Form Long Form DATA CARRIER 300 CARRIER 1200/75 CARRIER 75/1200 CARRIER 1200 CARRIER 2400 CARRIER 4800 CARRIER 7200 CARRIER 9600 CARRIER 12000 CARRIER 14400 COMPRESSION: CLASS 5 COMPRESSION: V.42 bis COMPRESSION: NONE PROTOCOL: NONE...

  • Page 30: Zn, Soft Reset And Restore Profile

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Yn, Long Space Disconnect Description Enables/disables the generation and response to long space disconnect. The parameter value, if valid, is written to S21 bit 7. Disables long space disconnect (default). Enables long space disconnect. In non-error correction mode, the modem sends a long space of four seconds before going on-hook, and responds to the receipt of a long space (i.e., a break signal greater than 1.6 seconds) by...

  • Page 31: At& Commands

    AT Command Set AT& Commands &Dn, DTR Option Description Interprets the ON to OFF transition of the DTR signal from the DTE according to the parameter supplied. The parameter value, if valid, is written to S21 bits 3 and 4. See S25, Delay To DTR on page 2-15.

  • Page 32: Fn, Restore Factory Configuration (Profile)

    CRD 1500 Modem/Charging Cradle Programmer’s Guide &Fn, Restore Factory Configuration (Profile) Description Loads the factory default configuration (profile). The factory defaults are identified for each command and in the S-Register descriptions. A configuration (profile) consists of a subset of S-Registers.

  • Page 33: Mn, Asynchronous/Synchronous Mode Selection

    AT Command Set &Kn, Flow Control Description Defines the DTE/DCE (terminal/modem) flow control mechanism. The parameter value, if valid, is written to S39 bits 0, 1, and 2. &K0 Disables flow control &K3 Enables RTS/CTS flow control &K4 Enables XON/XOFF flow control &K5 Enables transparent XON/XOFF flow control &K6...
  • Page 34 CRD 1500 Modem/Charging Cradle Programmer’s Guide &Qn, Sync/Async Mode Description This command is an extension of the &M command and controls the connection modes permitted. It is used in conjunction with S36 and S48. (See Nn, Automode Enable on page 1-8.)

  • Page 35: Rn, Rts/Cts Option

    AT Command Set Result Codes n = 0 to 6 ERROR Otherwise &Rn, RTS/CTS Option Description Selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &Kn, Flow Control on page 1-19 command). The parameter value, if valid, is written to S21 bit 2.
  • Page 36 CRD 1500 Modem/Charging Cradle Programmer’s Guide &T3 Initiates local digital loopback, V.54 Loop 2. Sets S16 bit 2. If no connection exists, ERROR is returned. Sets S16 bit 4 when the test is in progress. &T4 Enables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote modem is allowed.
  • Page 37 AT Command Set &V, Display Current Configuration and Stored Profiles Description Reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone numbers. Result Code Example AT&V ACTIVE PROFILE: B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 &Y0 S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002 S09:006 S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138 S48:007 S95:000...

  • Page 38: Wn, Store Current Configuration

    CRD 1500 Modem/Charging Cradle Programmer’s Guide &V1, Display Last Connection Statistics Description Displays the last connection statistics in the following format (shown with typical results): TERMINATION REASON LINK DISCONNECT or LOCAL REQUEST LAST TX data rate 14400 BPS HIGHEST TX data rate...

  • Page 39: Yn, Designate A Default Reset Profile

    AT Command Set ERROR Otherwise &Yn, Designate a Default Reset Profile Description Selects which user profile is used after a hard reset. &Y0 The modem uses profile 0. &Y1 The modem uses profile 1. Result Codes n = 0 to 1 ERROR If n >...

  • Page 40: At% Commands

    CRD 1500 Modem/Charging Cradle Programmer’s Guide AT% Commands %C, Enable/Disable Data Compression Description Enables or disables data compression negotiation. The modem can only perform data compression on an error corrected link. The parameter value, if valid, is written to S41 bits 0 and 1.

  • Page 41: L, Line Signal Level

    AT Command Set ERROR Otherwise Fallback/Fall Forward: When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient, the modem initiates a rate re-negotiation to a lower speed within the V.32 bis/V.32 modulation speeds. The modem continues to fall back within the current modulation if necessary until the speed reaches 4800 bps.

  • Page 42: At\ Commands

    CRD 1500 Modem/Charging Cradle Programmer’s Guide AT\ Commands \An, Select Maximum MNP Block Size Description The modem operates an MNP error corrected link using a maximum block size controlled by the parameter supplied. The parameter value, if valid, is written to S40 bits 6 and 7.

  • Page 43: Kn, Break Control

    AT Command Set Note When the modem receives a break from the remote modem, break is passed to the DTE as follows: • In non-error correction mode direct, the break length is passed • In non-error correction mode normal and in error correction mode, a 300 ms break is passed.
  • Page 44 CRD 1500 Modem/Charging Cradle Programmer’s Guide Send break to remote modem in sequence with data. Send break to remote modem in sequence with data (default). 1-30...
  • Page 45 AT Command Set Third State A break is received from a remote modem during a non-error corrected connection: Clear data buffers and send break to the DTE. Clear data buffers and send break to the DTE. Send a break immediately to DTE. Send a break immediately to DTE.
  • Page 46 CRD 1500 Modem/Charging Cradle Programmer’s Guide \Nn, Operating Mode Description Controls the preferred error correcting mode to be negotiated in a subsequent data connection. Selects normal speed buffered mode (disables error-correction mode). (Forces &Q6.) Selects direct mode and is equivalent to &M0, &Q0 mode of operation.

  • Page 47: At+ Commands

    AT Command Set AT+ Commands +GCI, Country Profiles Description The +GCI command functionality is in accordance with ITU V.250 and T.35 as follows: +GCI=xx Changes country code where xx is the T.35 code defined in the following table. The new country code is used after the next reset (either power or Z command).

  • Page 48: Ms, Select Modulation

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Table 1-2. Table of Country Codes according to ITU T.35 (continued) Country +GCI=xx *NCyy Country +GCI=xx *NCyy Greece Reserved for future Turkey use Reserved for future Hungary use European Notes 1. European-specific hardware is required. To avoid damage, use CRD1500-1000EU in Europe.
  • Page 49 AT Command Set 2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at their current values. Reporting Selected Options The modem can send a string of information to the DTE consisting of selected options using the following command: +MS? The response is:...
  • Page 50 CRD 1500 Modem/Charging Cradle Programmer’s Guide Subparameter Definitions <mod> A decimal number which specifies the preferred modulation (automode enabled) or the modulation (automode disabled) to use in originating or answering a connection. The options are: Table 1-3. Modulation Rates <mod>...
  • Page 51 AT Command Set <automode> an optional numeric value which enables or disables automatic modulation negotiation using V.8 bis/V.8 or V.32 bis Annex A. The options are: Automode disabled Automode enabled using V.8 bis/V.8 or V.32 Annex A (default) The default value is 1, which enables automode. However, there are modulations for which there is no automatic negotiation, e.g., Bell 212 (<mod>...
  • Page 52 CRD 1500 Modem/Charging Cradle Programmer’s Guide <min_rate> an optional number which specifies the lowest rate at which the modem may establish a connection. The value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps.

  • Page 53: Chapter 2. S-Registers

    Chapter 2 S-Registers Table 2-1 summarizes the S-Registers and their default values. Use the &Wn command to store registers denoted with an '*' in one of the two user profiles. Use the Zn command to load any of these profiles. “Reserved” denotes registers reserved for current or future use by the firmware, or are permanently overridden by PTT limitations.
  • Page 54 CRD 1500 Modem/Charging Cradle Programmer’s Guide Table 2-1. S-Register Summary Register Function Range Units Saved Default** Rings to Auto-Answer 0-255 rings Ring Counter 0-255 rings Escape Character 0-255 ASCII Carriage Return Character 0-127 ASCII Line Feed Character 0-127 ASCII Backspace Character...
  • Page 55 S-Registers Table 2-1. S-Register Summary (continued) Register Function Range Units Saved Default** Results Bit Mapped Options Status - 117 (75h) General Bit Mapped Options Status 62 (3Dh) Sleep Inactivity Timer 0-255 Delay to DTR Off 0-255 s or 0.01 s RTS-to-CTS Delay 0-255 0.01 s...

  • Page 56: S-Register Definitions

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Table 2-1. S-Register Summary (continued) Register Function Range Units Saved Default** Call Failure Reason Code 0-255 Result Code Messages Control *Register value may be stored in one of two user profiles with the &W command.

  • Page 57: S3, Carriage Return Character

    S-Registers S2, Escape Character Description Holds the decimal value of the ASCII character used as the escape character. The default value corresponds to an ASCII '+'. A value over 127 disables the escape process, i.e., no escape character is recognized. Range: 0-255, ASCII decimal Default: 43 (+)

  • Page 58: S6, Wait Time For Dial Tone Before Blind Dialing, Or After "W" Dial Modifier

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S5, Backspace Character Description Sets the character recognized as a backspace. Pertains to asynchronous operation only. The modem does not recognize the Backspace character if it is set to a value greater than 32 ASCII. This character can be used to edit a command line.

  • Page 59: S8, Pause Time For Dial Delay

    S-Registers S7, Wait Time For Carrier After Dial, For Silence Description Sets the length of time, in seconds, the modem waits for carrier before hanging up. The timer is started when the modem finishes dialing (originate), or 2 seconds after going off- hook (answer).

  • Page 60: S10, Lost Carrier To Hang Up Delay

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S10, Lost Carrier To Hang Up Delay Description Sets the length of time, in tenths of a second, the modem waits before hanging up after a loss of carrier. This allows for a temporary carrier loss without causing the local modem to disconnect.

  • Page 61: S14, General Bit Mapped Options Status

    S-Registers S14, General Bit Mapped Options Status Description Indicates the status of command options. Default: 138 (8Ah) (10001010b) Bit 0 This bit is ignored. Bit 1 Command echo (En) 0 = Disabled (E0) 1 = Enabled (E1) (default) Bit 2 Quiet mode (Qn) 0 = Send result codes (Q0) (default) 1 = Do not send result codes (Q1)

  • Page 62: S16, General Bit Mapped Test Options Status

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S16, General Bit Mapped Test Options Status Description Indicates the test in progress status. Default: 0 Bit 0 Local analog loopback 0 = Disabled (default) 1 = Enabled (&T1) Bit 1 Not used Bit 2...

  • Page 63: S18, Test Timer

    S-Registers S18, Test Timer Description Sets the length of time, in seconds, the modem conducts a test (commanded by &Tn) before returning to the command mode. If this register value is zero, the test does not automatically terminate; you must issue an &T0 or H command from the command mode. When S18 is non-zero, the modem returns the OK message upon test termination.

  • Page 64: S20, Autosync Hdlc Address Or Bsc Sync Character

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S20, AutoSync HDLC Address or BSC Sync Character Description Defines the HDLC address (S19 bit 1 = 1) or BSC Sync Character (S19 bit 1 = 0) for AutoSync operation (see &Qn, Sync/Async Mode on page 1-20).

  • Page 65: S22, Speaker/Results Bit Mapped Options Status

    S-Registers 0 = &S0 selected (default) 1 = &S1 selected Bit 7 Long space disconnect (Yn) 0 = Y0 (default) 1 = Y1 S22, Speaker/Results Bit Mapped Options Status Description Indicates the status of command options. Default: 117 (75h) (01110101b) Bits 0-3 Reserved Bits 4-6 Limit result codes (Xn) 0 = X0...
  • Page 66 CRD 1500 Modem/Charging Cradle Programmer’s Guide S23, General Bit Mapped Options Status Description Indicates the status of command options. Default: 62 (3Dh) (00111110b) Bit 0 Grant RDL 0 = RDL not allowed (&T5) (default) 1 = RDL allowed (&T4) Bits 1-3 DTE Rate...

  • Page 67: S25, Delay To Dtr

    S-Registers S24, Sleep Inactivity Timer Description Sets the length of time, in seconds, the modem operates in normal mode with no detected telephone line or DTE line activity before entering low-power sleep mode. The timer is reset upon any DTE line or telephone line activity. If the S24 value is zero, neither DTE line nor telephone inactivity will cause the modem to enter the sleep mode.

  • Page 68: S28, Bit Mapped Options Status

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S27, Bit Mapped Options Status Description Indicates the status of command options. Default: 73 (49h) (01001001b) Bits 0,1,3 Synchronous/asynchronous selection (&Mn/&Qn) 3 1 0 0 0 0 = &M0 or &Q0 0 0 1 = &M1 or &Q1 0 1 0 = &M2 or &Q2...

  • Page 69: S30, Disconnect Inactivity Timer

    S-Registers 0 = 39%-61% make/break ratio at 10 pulses per second (&P0) (default) 1 = 33%-67% make/break ratio at 10 pulses per second (&P1) 2 = 39%-61% make/break ratio at 20 pulses per second (&P2) 3 = 33%-67% make/break ratio at 20 pulses per second (&P3) Bit 5-7 Reserved S30, Disconnect Inactivity Timer Description...

  • Page 70: S32, Xon Character

    CRD 1500 Modem/Charging Cradle Programmer’s Guide Bits 6-7 Reserved (default = 11b) S32, XON Character Description Sets the value of the XON character. Range: 0-255, ASCII decimal Default: 17 (11h) S33, XOFF Character Sets the value of the XOFF character.

  • Page 71: S37, Desired Line Connection Speed

    S-Registers S37, Desired Line Connection Speed Description Specifies the desired line connection speed. Notes 1. When the Nn command is issued or the S37 register value is modified, the +MS command subparameters are updated to reflect the speed and modulation specified by the S37 value (see +MS, Select Modulation on page 1-34).

  • Page 72: S38, Delay Before Forced Hang Up

    CRD 1500 Modem/Charging Cradle Programmer’s Guide 7 = Attempt to connect at V.23. 8 = Attempt to connect at V.32 bis/V.32 4800 bps. F6 command 9 = Attempt to connect at V.32 bis/V.32 9600 bps. F8 command 10 = Attempt to connect at V.32 bis 12000 bps. F9 command 11 = Attempt to connect at V.32 bis 14400 bps.

  • Page 73: S40, General Bit Mapped Options Status

    S-Registers S39, Flow Control Bit Mapped Options Status Description Default: 3 (00000011b) Bits 0-2 Status of command options 0 = No flow control 3 = RTS/CTS (&K3) (default) 4 = XON/XOFF (&K4) 5 = Transparent XON (&K5) 6 = Both methods (&K6) Bits 3-7 Reserved S40, General Bit Mapped Options Status Description...

  • Page 74: S41, General Bit Mapped Options Status

    CRD 1500 Modem/Charging Cradle Programmer’s Guide 2 = 192 chars (\A2) 3 = 256 chars (\A3) S41, General Bit Mapped Options Status Description Indicates the status of command options. Default: 195 (C3h) (11000011b) Bits 0-1 Compression selection (%Cn) 0 = Disabled (%C0) 1 = MNP 5 (%C1) 2 = V.42 bis (%C2)

  • Page 75: S48, V.42 Negotiation Action

    S-Registers S46, Data Compression Control Description Controls selection of compression. The following actions are executed for the given values: Range: 136 or 138 Default: 138 S46=136 Execute error correction protocol with no compression. S46=138 Execute error correction protocol with compression (default). S48, V.42 Negotiation Action Description The V.42 negotiation process determines the capabilities of the remote modem.

  • Page 76: S86, Call Failure Reason Code

    CRD 1500 Modem/Charging Cradle Programmer’s Guide S86, Call Failure Reason Code Description When the modem issues a NO CARRIER result code, a value is written to this S-Register to help determine the reason for the failed connection. S86 records the first event that contributes to a NO CARRIER message.
  • Page 77 S-Registers Bit 4 Reserved. Bit 5 Enable COMPRESSION result code (XXXX = compression type). Bit 6 Reserved. Bit 7 Reserved. 2-25...
  • Page 78 CRD 1500 Modem/Charging Cradle Programmer’s Guide 2-26...
  • Page 79 Index Qn ......1-10 quiet results code ....1-10 AT command set .
  • Page 80 ..... 2-4 contacting Symbol ....viii RTS to CTS delay .
  • Page 81 S39 ......2-21 Symbol support centers ....viii S4 .
  • Page 82 SPT 1500/1550 Programmer’s Reference Guide Index-4...
  • Page 83 We’d like to know what you think about this Manual. Please take a moment to fill out this questionnaire and fax this form to: (631) 738-3318, or mail to: Symbol Technologies, Inc. One Symbol Plaza M/S B-4 Holtsville, NY 11742-1300 Attention: Technical Publications Manager IMPORTANT: If you need product support, please call the appropriate customer support number provided.

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