ZyXEL Communications COMET 336 User Manual
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ZyXEL Communications COMET 336 User Manual

ZyXEL Communications COMET 336 User Manual

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Comet 336
User's Manual
March 97

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Summary of Contents for ZyXEL Communications COMET 336

  • Page 1 Comet 336 User’s Manual March 97...

  • Page 2: Limited Warranty

    Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to two (2) years from the date of purchase. During the warranty period, and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials, ZyXEL will, at its option, repair or replace the defective products or components without charge for either parts or labor, and to whatever extent it shall deem necessary to restore the product or components to proper operating...

  • Page 3: Contacting Zyxel

    Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Shielded RS-232 cables are required to be used to ensure compliance with FCC Part 15, and it is the responsibility of the user to provide and use shielded RS-232 cables.
  • Page 4 FTP address: ftp.zyxel.com For European versions and related files, use the address: ftp.zyxel.co.at • Postal Service: You can send written communications at the following address: ZyXEL Communications Corporation 6, Innovation Road II, Science-Based Industrial Park Hsinchu, Taiwan 300, ROC ZyXEL Communications Inc.

  • Page 5: Table Of Contents

    Contacting ZyXEL iii 1 Introduction 1 Unpacking Your Modem 1 Becoming a Registered Owner 1 2 Installation 3 Optional Steps for Comet 336 Installation 3 Telephone Jack 4 Microphone 4 Speaker 4 Driver and Software Installation 4 Windows 95 Driver Installation 4...
  • Page 6 Non-Volatile Memory 18 Storing Phone Numbers 19 Dialing Stored Phone Numbers 19 Saving Settings and User Profiles 19 Helpful Hints for PC Computers 19 Default Modem Settings for PC’s 20 4 Advanced Data Communications 22 Front Panel LEDs 22 DTE Interface 22 Synchronous and Asynchronous Communications 22 UART 23 Serial Port 23...
  • Page 7 Basic AT Command Set 30 Extended AT& Command Set 31 Extended AT* Command Set 33 7 Status Registers & Result Codes 36 S-Registers "ATSn=x" 36 S-Register Definitions 36 Result Code Options 39 "ATXn" Result Code Option Table 39 Result Code Field Descriptions 40 8 Fax Operation 42 Modem as Fax Machine 42 ITU-T T.30 Fax Protocol 42...

  • Page 8: Introduction

    Introduction Congratulations on the purchase of your Comet 336 modem - one of ZyXEL's premier high-performance products. The Comet 336 is world renown for its ability to maintain ultra high speeds and clear, quality connections while communicating around the globe.
  • Page 9 2 Introduction...

  • Page 10: Installation

    LINE jack on the back of the modem. Plug the other end into a telephone wall jack, just as you would a standard telephone. Turn the Comet 336 on by raising the blue power switch. The PWR LED should come on and the modem performs a self-test procedure.

  • Page 11: Telephone Jack

    Driver and Software Installation This section contains step by step procedures for installing the Windows 95 and NT drivers, and configuring Dial-up Networking for the Comet 336. Windows 95 Driver Installation Open the Control Panel by double clicking the “Control Panel” icon in your “My Computer”...
  • Page 12 INF file from ZyXEL’s FTP, Website, or BBS, use "Browse" to find the location of the updated .INF file, click "Open.” Then click "OK.” Select Comet 336 from the list. Then click "Next.” Installation 5...

  • Page 13: Windows 95 Dial-Up Networking

    Click "Finish.” You should see a window similar to the one below: 7. Click "Close.” This completes the installation of your Comet 336 modem driver. You may now use programs such as "Dial-Up Networking" with your ZyXEL modem.
  • Page 14 2. From within the Dial-up Networking folder, double click on the "Make New Connection" icon. Choose a name for your connection and select your modem type from the drop down window. Then click on the "Next" button. Enter the phone number to your ISP or whatever host you are calling into. Click on the "Next"...
  • Page 15 Click on the Finish button. A new icon is created in the Dial-up Networking folder. Right click on this icon. Then select "Properties" from the menu. Make sure your Comet modem appears in the "Connect Using.” Then click on the "Server Type"...
  • Page 16 These options are mostly host or server specific. • If you are using PPP, use the default settings shown above. • If you are logging on to an Internet connection, then select "TCP/IP.” • If you are connecting to a LAN, then select "Login to Network.” •...
  • Page 17 If your host requires you to specify an IP address (Static IP), then click on the "Specify and IP address" radio button and enter your IP address. If your host assigns an IP when you log in (Dynamic IP), then leave the "Server assigned IP address"...

  • Page 18: Setup For Dos Fax/Modem Software

    If your communications software requires you to select a modem, and the ZyXEL Comet 336 is not one of the choices, you can either check our web site for the driver or select the ZyXEL U-1496 modem. In many cases, the commands for these modems are identical.
  • Page 19 6. Type AT and press the Enter key. You should see the AT characters you typed, followed by an OK result code. If you do not see an OK result code, turn the modem off and on, then repeat this step. Type ATDT number and press Enter, where number is your modem’s telephone number.
  • Page 20 Installation 13...

  • Page 21: Basic Modem Operation

    This chapter covers the basic commands and techniques involved in modem operation. In many cases, this is the only information you will need in order to get your Comet 336 up and running with communication software, and to start making connections with your Comet 336.

  • Page 22: Dialing And Answering Techniques

    Type: ATA<Enter> The Comet 336 will pick up the phone line, and try to communicate. Normally, this command is only used to answer an incoming call made from another modem. Thus the high pitched noise you will hear from the speaker. To abort the operation, press any key, or select “Disconnect”...

  • Page 23: Auto-Answer And Hook Controls

    Originating a call using an Answer Tone: ATDT 555 1212,,,,,,R Redialing the Last Number Called: ATDL Waiting for Five Seconds of Silence: ATDT 800 555 1212 @ 123456,1 714 555 1212 Transferring a Call (using flash hook): ATDT! 2468 Auto-Answer and Hook Controls Enabling Auto-Answer: ATS0=n Disabling Auto-Answer:...
  • Page 24 The Comet 336 processes commands from left to right. The AT command that appears to the right might over-write the command to the left if they are trying to accomplish tasks or set modes that cannot coexist. • If you see duplicated characters for each one you type, your Comet 336 and software both have their “echo”...

  • Page 25: Modem Result Codes

    Non-Volatile Memory The Comet 336 has an amount of memory set aside for storing user information such as frequently used phone numbers and default command settings. This latter is particularly useful when you use your modem to call a variety of different locations that require different settings.

  • Page 26: Storing Phone Numbers

    There are some cases where you may wish to save the settings you have made as the default settings that are recalled when the Comet 336 is powered up. The AT&WZ command selects the current settings as the power-on profile.

  • Page 27: Default Modem Settings For Pc's

    Default Modem Settings for PC’s The Comet 336 factory settings are configured for operation with PC type computers and communications software. In most cases, no additional settings will be required. The following are some of the default settings that are used for operation with PC...
  • Page 28 Basic Modem Operation 21...

  • Page 29: Advanced Data Communications

    Comet 336, including definitions of many of the communications-related terms used in this manual. Front Panel LEDs The Comet 336 has 9 front panel LEDs. Refer to the following tables for details on the LED status indicators and their meanings. State...

  • Page 30: Uart

    In the USA, Bell Systems used to create de facto standards such as Bell 212A for 1200 bps modems and Bell 103 for 300 bps modems. The Comet 336 supports all the above mentioned modem standards and are compatible with existing modems.

  • Page 31: Universal Protocol Compatibility

    Universal Protocol Compatibility Universal compatibility covers a broad range of ITU-T and BELL standards, and provides data compression. Various operation modes that can be achieved are as follows: Standard BPS rate Baud rate Modulation Carrier Freq (+/-0,01%) (+/-0,01%) [Hz] V.34bis 33,600/31,200 2400 1800...

  • Page 32: Crc (Cyclical Redundancy Check) Error Detection

    The modem checks every block received for error(s). Data Compression The Comet 336 supports both V.42bis and MNP5 data compression protocols. Data compression works by representing the original data information in less bits and transmitting the reduced data bits through the data link. The receiver recovers the original information by reversing the representing process.

  • Page 33: Hardware Or Software Flow Control

    DTE. In asynchronous full-duplex applications, the Comet 336 always responds to the RTS signal as a flow control signal. The Comet 336 defaults automatically to this hardware flow control setting and it is a better choice.

  • Page 34: Special Functions

    Special Functions This chapter describes the special features of the Comet 336, and offers instructions on how each is used. Caller Number Delivery (Caller ID) Caller Number Delivery (CND), commonly called Caller ID, is a new kind of phone service that may be offered by your local phone company. Check your phone company for availability.

  • Page 35: Distinctive Ring

    NMBR NMBR = <number> or P or O where <number> is the telephone number of the caller, where P indicates that the calling number information is not available since the originating caller has requested private service, and where O indicates that the calling number information is not available or out of service at the calling location.
  • Page 36 Special Functions 29...

  • Page 37: At Command Set Summaries

    AT Command Set Summaries Basic AT Command Set Command Options Function & Description Ref. Re-execute the last command once <any key> Terminate current connection attempt when enter in handshaking state. Escape sequence code, entered in data state, wait for modem to return to command state. All the Following Commands Require a “AT”...

  • Page 38: Extended At& Command Set

    Command Options Function & Description Ref. Speaker ON until CD is detected Return to on-line state Return to on-line state with forced retrain Result code displayed Q0 * Modem returns result code Modem does not return result code Modem returns result code but quiet after answering on a RING.
  • Page 39 Command Options Function & Description Ref. &Kn Modem error control and data compression. &K0 No error control. &K1 MNP4 &K2 MNP4+MNP5 &K3 V.42+MNP4. &K4 * V.42+V.42bis, compatible with &K2 &Mn Synchronous/asynchronous mode selection &M0 * Asynchronous mode with data buffering &M1 Asynchronous command, synchronous data &M2...

  • Page 40: Extended At* Command Set

    Command Options Function & Description Ref. &Sn Data Set Ready (DSR) function selection. &S0 * DSR overridden, DSR always ON. &S1 DSR set ready &Tn Modem testing. &T0 Terminate test in progress. &T1 Initiate Analog Loop-back (ALB) test. &T3 Initiate Local Digital Loop-back (LDL) test &T4 Grant Remote Digital Loop-back request from remote modem...
  • Page 41 Enables Distinctive Ring Type 2 and 3 Enables Distinctive Ring Type 1, 2, and 3 Fax commands are located in Chapter 8 of the ZyCD edition of the Comet 336 User’s Manual. Voice commands are located in Chapter 9 of the ZyCD edition of the Comet 336 User’s Manual.
  • Page 42 AT Command Set Summaries 35...

  • Page 43: Status Registers & Result Codes

    Status Registers & Result Codes In most bit-mapped S-registers, the default bit value is 0. Non-0 default values are followed by an asterisk. Some bits are reserved for factory use and should not be changed. S-Registers "ATSn=x" Command Function & Description Range Ref.
  • Page 44 S3 - Carriage Return Character Sets the command line and result code terminator character. Pertains to asynchronous operation only. S4 - Line Feed Character Sets the character recognized as a line feed. Pertains to asynchronous operation only. The Line Feed control character is output after the Carriage Return control character if verbose result codes are used.
  • Page 45 S10 - Lost Carrier To Hang Up Delay Sets the length of time, in tenths of a second, that 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 46: Result Code Options

    S32 - XON Character Sets the value of the XON character. S33 - XOFF Character Sets the value of the XOFF character. S38 - Delay Before Forced Hang Up This register specifies the delay between the modem's receipt of the H command to disconnect (or ON-to-OFF transition of DTR if the modem is programmed to follow the signal), and the disconnect operation.

  • Page 47: Result Code Field Descriptions

    CONNECT 38400 CONNECT 57600 CONNECT 115200 CONNECT 16800 CONNECT 21600 CONNECT 24000 CONNECT 26400 CONNECT 28800 Result Code Chart Symbol Reference: Supported Reports the DTE Speed as: <cr><lf>CONNECT DTE_Speed<cr><lf> CONNECT DTE_Speed/Protocol DCE_Speed/Error_Control † Example: CONNECT 38400/V.32bis 14400/V.42bis <cr><lf>CONNECT DCE_Speed[/Error_Code]<cr><lf> Example: CONNECT 14400/ARQ CONNECT DCE _Speed/Error_Code/Error_Control †...
  • Page 48 Status Registers & Result Codes 41...

  • Page 49: Fax Operation

    Fax Operation The Comet 336 can be used as a fax machine, and this chapter explains how. In the sections below, we will describe how the modem works as a fax machine, the ITU-T T.30 fax protocol and the Class 1 and 2 fax commands. The instructions for using the included modem/fax/voice utility program are included on the software disk.

  • Page 50: Defining The Fax Command Sets

    The flow control signaling used sending a fax is: • CTS is used by the Comet 336 to flow control the DTE. When the modem turns CTS off, the buffer inside the modem is full and cannot accept any more data. The computer should send data only when CTS is ON.

  • Page 51: Fax Class 2 At Command Set

    +FCLASS=n Service Class ID. n=0 * Select Data Mode. Select Facsimile Class 1. Select Facsimile Class 2. Select voice mode. +F<command> Report Active Configuration. +F<command> Report Operating Capabilities. +FAE=n Data/Fax Auto Answer. n=0 * Disable data/fax auto answer mode. Enable data/fax auto answer mode. +FRH=n Receive Data with HDLC Framing.
  • Page 52 n=0 * Select Data Mode. Select Facsimile Class 1. Select Facsimile Class 2. Select voice mode. +F<command> Report Active Configuration. +F<command> Report Operating Capabilities. +FAE=n Data/Fax Auto Answer. Disable data/fax auto answer mode Enable data/fax auto answer mode +FAA=n Adaptive answer. n=0 * Constrains the DCE to answer as set by +FCLASS.
  • Page 53 +FPHCTO Phase C time out. +FPOLL Indicates polling request. +FPTS: Page transfer status. +FPTS= Page transfer status. +FREV? Identify revision. +FSPL Enable polling +FTSI: Report the transmit station ID. +FBADLIN: # of consecutive bad line. +FBADMUL: Error rate multiplier. +FBUG: Session message reporting.
  • Page 54 Fax Operation 47...

  • Page 55: Voice Operation

    Voice Operation Voice mode refers to the Comet 336’s ability to digitize incoming voice messages, which the computer stores and forwards. It also means the modem can playback the recorded digitized voice either off-line for local message listening or on-line for a message announcement.
  • Page 56 the VCON message, after which AT commands can be entered without aborting the telephone line connection. If the modem is the answerer, it enters Online Voice Command Mode immediately after going off-hook, and can report instances of DTMF tones and calling tones to the DTE. If the modem is the originator, it enters Online Voice Command Mode based on detection of the ringback cadence going away, upon expiration of the ringback never came timer, or upon detection of answer tone, and the modem can report DTMF tones, answer tones,...
  • Page 57 command. This mode is typically used when playing back greeting messages or previously received/recorded messages. In this mode: 1. If the Voice Sub-configuration is in operation, voice decompression is provided by the ADPCM codec, and the decompressed ADPCM voice data is then reconstituted into analog voice by the DAC at the original compression quantization sample-per-bits rate.
  • Page 58 Data The modem dials and reports call progress to the DTE as in all modes. A data handshake is pursued according to the current configuration. Adaptive Originate (Dial with Voice/Data/Fax Discrimination) The DTE may wish to originate a call which adapts to the remote answerer. For instance, the user may wish to send a voice message if a human picks up the telephone, but a facsimile if a fax machine answers.
  • Page 59 Data/Fax Discrimination If the DTE wishes to allow for a data or fax call, the +FCLASS and +FAA or +FAE commands can be configured for adaptive answer between data and Class 1 or Class 2 fax. Voice/Fax Discrimination This is the most important discrimination capability needed from the user's standpoint. The modem must be configured for Voice/Audio (#CLS=8), causing the modem to enter Online Voice Command Mode immediately upon going off-hook.
  • Page 60 72,000 bps 115.2 kbps 2 (4-bits) 36,000 bps 38.4 kbps 4 (2-bits) 18,000 bps 19.2 kbps b. 11.025 kHz Sample Rate Modem Samples per 8-bit Byte Required Asynchronous DTE Speed (8N1 Format) Implied DTE Speed Supported 1 (8-bits) 110,250 bps 115.2 kbps 7.2.4 Tone and Status Monitoring Shielded <DLE>...
  • Page 61 DTE have the ability to stop the code with flow control. If the DTE has started (but not completed) sending any AT command, the Tone Monitoring function is disabled until the command has been received and processed. The modem can discriminate between single and multiple DTMF tones received. If calling tone, dial tone, busy tone, or answer tone is detected, this detection is reported repeatedly (at reasonable intervals) if the DTE takes no action, and the tone continues to be detected.
  • Page 62 dial tone continues to be detected and the DTE does not react. This allows the DTE the flexibility of ignoring what could be a false dial tone detection. <DLE>e European Data Modem Calling Tone. Sent when the V.25 1300 Hz Calling Tone (Data Modem) is detected in a voice submode.
  • Page 63 Code Sent to DTE Meaning <DLE>s Silence. Sent in Voice Receive Mode after the silence detection timer (#VSP) expires and if valid voice has not been detected (#VSS). In general, <DLE>s is sent if no sound was detected at all. This differs slightly from Quiet (<DLE>q) in that it can be used by the DTE in its discrimination algorithms as a means of determining if anything at all is coming from the remote station.
  • Page 64 Table 7-3. Shielded DTE Codes Code Sent to Modem Meaning <DLE>p Pause. Sent during Voice Transmit Mode to force the modem to suspend sending voice data to the selected output device(s). Any data currently in the voice transmit buffer is saved until either a resume (<DLE>r), or cancel <DLE><CAN>, is received, in which case the data is lost.
  • Page 65 volume by a value of 5 units. The <DLE>d code can be used to adjust the volume within the range of 128-228. (See <DLE><u> and <DLE><d> in Section 7.3.2.) <DLE><CAN> Cancel. Sent during Voice Transmit Mode to indicate that the DTE has finished transmitting a voice message and wants the modem to discard any remaining data in the voice transmit buffer.
  • Page 66 Recording can be canceled only via two events: 1. The DTE sends any character to the modem. This is the key abort, and is the normal method of terminating the receive mode. 2. The S30 Disconnect Inactivity timer expires, which is generally an undesired event. 7.2.7 Voice Playback To effect playback of a message recorded via a handset or microphone, or of a message recorded during a voice call, the DTE must configure the modem for Voice Mode...

  • Page 67: Voice At Command Set

    When in Voice Receive Mode, the modem sends the proper shielded <DLE> code when dial tone or busy tone is detected. The modem stays in Voice Receive Mode, however, until the DTE issues a key abort to force Online Voice Command Mode. The DTE must issue the H command if it wishes to hang up.
  • Page 68 #V<command> Report Active Configuration. #V<command> Report Operating Capabilities. Answering command in voice mode. Dial command in voice mode. Hang up in voice mode. Reset from voice mode. #BDR Select baud rate (turn off autobaud). #CLS Select data, fax, or voice. Data.
  • Page 69 Route only the handset through the modem. Can be chosen before recording a greeting message. route only the speaker through the modem.Can be chosen before playing back any message. only the auxiliary input device (microphone) should be routed through the modem. Can be chosen before recording a greeting message.
  • Page 70 #VSP Silence detection period (voice receive). n=0-255 (0 - 2.55 sec), default:55 #VSR Sampling rate selection. n=7200 * 7200 Hz sampling rate for ADPCM or PCM. n=11025 11025 Hz sampling rate for PCM only. #VSS Silence detection tuner (voice receive). n=0 * Disables silence detection in Voice Receive Mode...

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