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CHAPTER

3

AT Commands

A

Hayes AT-compatible modem operates with
standard communications software that
enables a computer to control the L-Series

modems have a standard set of Hayes AT dialing
commands, in addition to an expanded set of commands
to control options not found in Hayes modems. The
Zypcom L-Series modems use the Cirrus Logic modem
chipset; thus, the L-Series modems will be compatible
with both Zypcom and Cirrus Logic modem drivers
found in popular communications software packages.

Software that will automatically identify your modem
(Windows 95, Netscape, etc.) will probably identify your
modem as a L-Series modem or a Cirrus Logic modem.
(The speed of the detected modem will vary with
software.) If your software says your modem is a
Zypcom L-Series or Cirrus Logic modem, accept the
modem description. Do not worry if your
communications software says it has detected a Zypcom
14.4 Kbps modem. Your software may have only
modem drivers for slower-speed versions of Zypcom or
Cirrus Logic. However, since the commands are the
same, these drivers will still operate your modem in
data and fax modes.

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Содержание Z34-PL

Страница 1: ...Zypcom Data Fax Modems User s Guide Z34 SL Z34 PL Part number 18008 513A August 1997...

Страница 2: ...Zypcom Inc 2301 Industrial Parkway West Bldg 7 Hayward CA 94545 TEL 510 783 2501 FAX 510 783 2414...

Страница 3: ...Zypcom Data Fax Modems User s Guide Z34 SL Z34 PL Part number 18008 513A August 1997...

Страница 4: ...ors Zypcom makes no endorsement of any vendor s product nor claims responsibility for the operation and accuracy of said product ____________________________________________________________ Zypcom SE...

Страница 5: ...ttings or Plug and Play Settings 2 2 Hardware Installation Steps 2 4 Additional Installation Information 2 7 Windows 95 Modem Setup for Z34 PL and Z34 SL 2 8 Using HyperTerminal with Windows 95 2 12 I...

Страница 6: ...3 7 AT Commands for Data Mode 3 9 Error Control and Compression Commands 3 24 Chapter 4 Troubleshooting General 4 1 Basic Communication Problems 4 2 Other Common Problems 4 6 Other Frequently Encount...

Страница 7: ...dition Zypcom welcomes your comments concerning this manual Although every effort has been made to keep it free of errors some do occasionally occur When reporting a specific problem or error please d...

Страница 8: ...A repair order RO number must accompany all returned equipment see Service Information later in this section Zypcom will repair and return the equipment to the Buyer and will prepay transportation cha...

Страница 9: ...0 days after the alleged breach THIS STATEMENT OF WARRANTY AND LIMITATION OF LIABILITY IS A COMPLETE AND EXCLUSIVE STATEMENT OF ALL WARRANTY AND LIABILITY REPRESENTATIONS OF ZYPCOM INC It may not be v...

Страница 10: ...in the original box or similar protective shipping container and send it prepaid to Repair Department Reference RO Number _______ Zypcom Inc 2301 Industrial Parkway West Bldg 7 Hayward CA 94545 Pleas...

Страница 11: ...quipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is...

Страница 12: ...number of devices that may be connected to your telephone line and that will still ring when your telephone number is called In most areas but not all the sum of the RENs of all the devices you may c...

Страница 13: ...the equipment is not malfunctioning This equipment may not be used on coin service provided by the telephone company Connection to party lines is subject to state tariffs Statement of Fax Branding The...

Страница 14: ...associated with a single line individual service may be extended by means of a telephone extension cord Compliance with the above conditions may not prevent degradation of service in certain situation...

Страница 15: ...number are listed on the modem label The Canadian DOC connector codes supported are CA11A CA41A and CA45A For internal modems on which the agency information label cannot be seen when the modem is in...

Страница 16: ...xiv Z...

Страница 17: ...eed data modem or a fax machine The L Series modems include software to control and use the advanced data and fax features supported by this modem Features q V 34 33 600bps asynchronous data modem wit...

Страница 18: ...t ISA slot q 3 5 floppy drive q Hard disk drive with 5MB free space q Free COM port address 1 2 3 or 4 q Free IRQ for the COM port 3 4 5 7 10 11 or 12 Modes of Operation The Zypcom L Series modems inc...

Страница 19: ...for data are listed in Table 3 1 in Chapter 3 Error Control Modes In data mode the modem supports error correction V 42 MNP 2 MNP 3 and MNP 4 and data compression V 42bis and MNP 5 Error correction en...

Страница 20: ...endix B For more information about Class 1 faxing please refer to the SuperVoice User s Guide included with your modem or use the software s Help functions Caller ID Caller ID is a service that allows...

Страница 21: ...g and Play feature to let the included driver disc PNP software select the COM port address and interrupt for the modem Check List In addition to this User s Guide your package includes the following...

Страница 22: ...re diskette and manual q User s Guide As you can see from our User s Guide both the Z34 SL and Z34 PL are sophisticated modems with advanced fax features which will serve you well for years to come Zy...

Страница 23: ...Z34 SL and Z34 PL installed on your PC and running on an asynchronous data dial up communication link You ll learn about the communication software you might need how to connect the Z34 SL and Z34 PL...

Страница 24: ...replacing a lower speed modem use those settings on your Z34 PL If you do not know of an available COM port and IRQ then try Plug and Play Plug and Play is Microsoft technology that will attempt to fi...

Страница 25: ...r modem for Plug and Play Windows 95 will assign the COM port and IRQ However it is recommended that you select your own settings rather than having the computer do it for you To place the jumpers ref...

Страница 26: ...r Remove the existing silver bracket behind the slot where you want to install the modem 5 Before you remove the modem from its static resistant bag be sure to discharge any static electricity on your...

Страница 27: ...d in step 2 Reconnect your PC power cord and any cables removed in the installation 8 Connect the modem telephone cable to the outside telephone line Plug one end of the telephone cable included with...

Страница 28: ...ovided on the Windows Drivers disk Please refer to the Windows 95 Modem Setup section in this chapter Windows 3 1 If you are using Windows 3 1 then you are ready to use the modem with your existing so...

Страница 29: ...ur new hardware From a bulleted list select Driver from disk provided by hardware manufacturer Click OK Insert the CD labeled Windows 95 CD ROM Click OK Windows 95 then asks whether or not to use the...

Страница 30: ...from the speaker Listen for the modem handshake Log in to the computer system that was called To log off click on the Disconnect icon If this does not work please refer to Chapter 4 entitled Troublesh...

Страница 31: ...pter To use HyperTerminal to test your new modem see the section on HyperTerminal which appeared earlier in this chapter Using HyperTerminal with Windows 95 After installing the modem and the INF file...

Страница 32: ...cannot do this if you have downloaded new features not supported by the modem you selected in the previous installation It is recommended that you remove the old Windows 95 modem setup if you repeat t...

Страница 33: ...another device and use this IRQ for your modem Alternately you can free up an IRQ by removing an existing board from the computer and removing its name from the Computer Properties screen CAUTION Remo...

Страница 34: ...M3 typically use IRQ4 COM2 and COM4 IRQ3 Windows 95 does not appropriately support devices sharing IRQs For plug and play devices this may become a major problem For non plug and play boards Windows 9...

Страница 35: ...oes not appear then either the modem was not added through the Modem Icon in the Control Panel or the modem s installation process failed 6 After double clicking your modem type a new screen displays...

Страница 36: ...modem if your modem supports that IRQ number 3 To determine which COM port addresses are available select the Input Output I O circle at the top of the Computer Properties screen Scroll down the scree...

Страница 37: ...n Proceed again SuperVoice Install is now copying all needed files will appear in the dialog box After all files have been copied insert diskette 2 into drive A Click on OK SuperVoice Install is now c...

Страница 38: ...refer to the Software User s guide for additional information If you are using other communication software please follow these suggestions 1 You must indicate to your communication software which COM...

Страница 39: ...n popular communications software packages Software that will automatically identify your modem Windows 95 Netscape etc will probably identify your modem as a L Series modem or a Cirrus Logic modem Th...

Страница 40: ...telephone number go off hook to answer an incoming fax or send an outgoing fax Online Data Mode When the modem connects to a remote modem it acquires carrier from the remote modem then negotiates its...

Страница 41: ...pendent escape sequence escape sequence To return to online data mode use the ATO ENTER command or the ATH ENTER command to disconnect If you enter an incorrect AT command while in this mode the modem...

Страница 42: ...ephone number to be dialed ENTER is the end of line flag that tells the modem to process the command entered Command Responses When you issue an AT command and end of line flag ENTER to the modem your...

Страница 43: ...eter from the command buffer do one of the following 1 Type AT ENTER or lower DTR to reset the command buffer 2 Use the BACKSPACE key to move backward or the DELETE key to erase the last character Mul...

Страница 44: ...mands must be separated from the following command by a semicolon The modem supports the commands listed in this chapter AT commands must always begin with the AT prefix and end with ENTER The only ex...

Страница 45: ...trol 3 12 N Handshaking 3 12 O Return to data mode 3 13 Q Result codes transmission 3 13 V Result codes type 3 13 W Connection result codes 3 14 X Basic result codes 3 14 Y Long space disconnect 3 16...

Страница 46: ...able abort character 3 24 C MNP control 3 24 A MNP block size 3 25 C Buffer control 3 25 G Modem port flow control 3 25 J Speed conversion 3 26 N Data mode control 3 26 O Originate reliable link 3 27...

Страница 47: ...Selects the frequency transmitted by the modem COMMAND DESCRIPTION B0 Use CCITT V 22 at 1200 bps and CCITT V 21at 300 bps B1 Use Bell 212A at 1200 bps and Bell 103 at 300 bps B2 Use CCITT V 23 only Th...

Страница 48: ...er S6 Switch hook flash 0 75 seconds duration Waits for 5 seconds of silence before continuing Returns to command mode after dialing S n Dials one of the four stored telephone numbers each with a maxi...

Страница 49: ...us Shows information about the read only memory ROM the firmware revision level and the revision levels of the data pump COMMAND DESCRIPTION I0 Reports product code I1 Reports modem chip firmware vers...

Страница 50: ...off M1 Speaker on until modem detects the carrier signal M2 Speaker is always on when modem is off hook M3 Speaker off during dialing on until modem carrier present Nn Negotiate Handshake Selects whe...

Страница 51: ...ode O1 Retrains equalizer and then returns to data mode Qn Result Codes Defines whether or not the modem will issue result codes to the DTE during normal operation These codes can cause confusion to s...

Страница 52: ...s W4 Reports protocol and line speed Xn Result Code Defines the type of result codes to be returned to the DTE COMMAND DESCRIPTION X0 Enables result codes 0 4 disables detection of busy and dial tone...

Страница 53: ...ECT 4800 11 N Y Y Y Y CONNECT 7200 24 N Y Y Y Y CONNECT 9600 12 N Y Y Y Y CONNECT 12000 25 N Y Y Y Y CONNECT 14400 13 N Y Y Y Y CONNECT 16800 59 N Y Y Y Y CONNECT 19200 14 N Y Y Y Y CONNECT 24000 62 N...

Страница 54: ...PTION Y0 Disables Long Space Disconnect Y1 Enables Long Space Disconnect The modem disconnects when it receives 1 6 or more seconds of a continuous break signal In addition when the modem receives a b...

Страница 55: ...ol Determines how DTR is interpreted by the modem D operates differently in asynchronous and synchronous communication and also works in conjunction with register S25 in asynchronous communication COM...

Страница 56: ...OMMAND DESCRIPTION G0 Disables guard tone G1 Enables 550 Hz guard tone G2 Enables 1800 Hz guard tone Kn Flow Control Specifies the DTE to modem flow control Software flow control uses the characters X...

Страница 57: ...Communication Protocol Control The modem is always in asynchronous mode The M0 command is also supported and represents the same function as Q0 Use the Nn command to specify which error control proto...

Страница 58: ...tes Remote Digital Loopback with self test T8 Initiates Local Analog Loopback with self test Un Trellis Control Selects whether the modem transmits or receives modulated 9600 bps carrier with QAM or T...

Страница 59: ...ed profile 0 on power up Y1 Recall stored profile 1 on power up Zn x Store Telephone Numbers Stores telephone number x in location n where n 0 through 3 The maximum length of each stored telephone num...

Страница 60: ...lly initiates a change to a higher speed or lower speed depending on received signal quality that is rate renegotiation The modem always responds to any rate change initiated by the remote modem COMMA...

Страница 61: ...ive V34B or V34BS is for 33600 to 2400 V34 or V34S is for 28800 to 2400 V32B is for 14400 to 7200 V32 is for 9600 and 4800 V22B is for 2400 and 1200 V22 is for 1200 V21 is for 300 Automode allows the...

Страница 62: ...et 21600 as max rate MS V34B 1 0 21600 B1 Set 9600 as min rate MS V34B 1 9600 0 Set 28800 only MS V34 1 28800 28800 Set 9600 to 300 only MS V32 1 0 0 B1 Set 9600 to 4800 only MS V32 0 0 0 Set 33600 to...

Страница 63: ...acter 0 through 127 Default 13 Cn MNP 5 Control Controls whether the data sent during the MNP frame is compressed using MNP Class 5 compression standard COMMAND DESCRIPTION C0 No compression C1 Enable...

Страница 64: ...lled non buffered modem calls a modem operating in buffered mode COMMAND DESCRIPTION G0 Disables port flow control G1 Sets port flow control to XON XOFF Jn Speed Conversion If enabled the serial port...

Страница 65: ...mpt to connect in V 42 or MNP mode The Cn Hn and J1 commands will also affect the operation of error control and data compression COMMAND DESCRIPTION N0 Normal data mode with buffering N1 Normal data...

Страница 66: ...hardware flow control uses the CTS control line to stop or start data from the DTE only while bidirectional hardware flow control also uses the RTS control to stop or start data from the modem COMMAND...

Страница 67: ...flow control is enabled G1 in normal mode this command specifies whether the XON and XOFF characters received from the remote modem are sent to the DTE In both cases flow control operation is not aff...

Страница 68: ...ressed into one V 42bis word The default is 32 bytes The range is 6 to 250 characters S REGISTER The L Series modem has 30 status registers commonly referred to as S registers which can be used to con...

Страница 69: ...changed using the ATSn x command where n is the register number and x is the value to be stored The contents of the S registers can be read using the ATSn command Each S register that is storable wil...

Страница 70: ...Character S2 0 128 Register S2 defines an ASCII character as the escape character Default 43 ASCII Return Character S3 0 127 Register S3 defines the end of line character Upon receiving this characte...

Страница 71: ...2 or 4 this register is ignored Also since the W modifier overrides S6 the modem will wait the length of the failed call timer S7 for dial tone when the W modifier is part of the dial command string...

Страница 72: ...of a second that the modem must see carrier before responding to it Default 6 0 6 seconds Lost Carrier Disconnect S10 1 255 Register S10 determines the amount of time the modem must wait to disconnec...

Страница 73: ...between 50 and 255 represents the number of milliseconds that the tone will be sent Default 70 0 070 seconds Guard Time S12 0 255 Register S12 controls the amount of time after receiving three escape...

Страница 74: ...0 the test continues indefinitely until stopped by the operator To manually stop a test enter the escape sequence and from online command mode issue an AT T0 ENTER command or ATH ENTER Default 0 indef...

Страница 75: ...detecting a change in the DTR signal Default 5 0 05 seconds S27 Bit mapped N A Inactivity Timer S30 0 255 Register sets the length of time in minutes that the modem stays online before disconnecting...

Страница 76: ...ty If you want to limit the maximum data rate at which the modem will begin to handshake this command is easier to use than the more robust MS command 0 DTE Rate 1 Reserved 2 Reserved 3 300 4 Reserved...

Страница 77: ...ata and parity 7 odd 7 even or 8 none q Terminal speed 115200 or 57600 or 38400 q Correct COM port is selected Z34 SL DTR LED on q Local echo setting on PC terminal is set to off q Hardware flow contr...

Страница 78: ...ulation mode TTY or VT100 which is sometimes called a direct connect mode To start troubleshooting double click on the SuperTerminal icon and set up the Setting Communication parameters Set Baud Rate...

Страница 79: ...4 Verify that the modem is connected to the serial port on your terminal or computer with your communications software Normally terminals and PCs for a selected port will have DTR and RTS on For examp...

Страница 80: ...parity 1 start bit and 1 stop bit 3 Type AT ENTER The TXD and RXD LEDs should reflect some activity by monitarily turning on off If these LEDs show activity when you type AT ENTER then type AT F W ENT...

Страница 81: ...you type If it doesn t enable local echo ATE1 ENTER and type the command blindly no echoing If ATE1 was already set then check to see if the CXR and DSR LEDs are on on the Z34 SL If not set them on AT...

Страница 82: ...a common problem involves error control If your modem is set for error control but you did not complete an error control handshake you can see a lot of unusual characters on your screen Force error co...

Страница 83: ...delays or not The four step process covers the following areas modem retraining line speed fallback and error control retransmissions Step One System Delays If the modem gets data with a lot of delays...

Страница 84: ...Zypcom technical support to assist you 2 However if the results are the same lots of modem retraining then reduce the maximum line speed allowed for the modem use the S37 or MS command 3 Have the pho...

Страница 85: ...o speed increments If no improvement has resulted then delays are not due to retransmissions Modem Drops the Connection Frequent line drops are normally due to a noisy telephone line a low quality mod...

Страница 86: ...oftware This kind of problem is usually site specific that is there are no problems with many other numbers and is due to some peculiarity in the modems which are communicating If the problem is repea...

Страница 87: ...tes the command settings to memory If you don t specify memory location n where n can be 0 or 1 the modem assumes 0 If the modem does not automatically answer when connected to a minicomputer or mainf...

Страница 88: ...into the connector labeled PHONE For the Z34 PL plug the phone line into a telephone to check dialtone 2 Lift the telephone handset If dial tone is not present you probably have a faulty line Call th...

Страница 89: ...ut Streams Garbage Characters If the modem dials connects to the remote modem streams lots of garbage characters on to your screen then streams possible hangs up see previous section modem fails to ha...

Страница 90: ...AT command NOTE Not all modems support the same AT command set Check the AT command set in this manual to ensure that you are using a supported AT command in your modem s initialization string Modem...

Страница 91: ...odem The phone line coming from the wall must be connected to the Wall or Line jack Windows 95 Installation Problems Refer to Chapter Two or Appendix E in this manual Technical Support If you could no...

Страница 92: ...4 16 4...

Страница 93: ...PL and Z34 SL 16bit ISA Parallel Bus and Plug and Play Interface Data Communication Standards Modulation V 34 V 34 V 32bis V 32 V 23 V 22bis V 22 V 21 and Bell 12A 103 Data Rates 33 6K 31 2K 28 8K 26...

Страница 94: ...EIA TIA 578 Fax Class 1 Fax Standards Modulation ITU T V 17 V 29 V 27 ter and V 21 channel 2 Data Rate 14 400 12 000 9600 7200 4800 2400 300 bps Format ITU T T 4 Group 3 Fax Handshake ITU T T 30 Group...

Страница 95: ...5 L ROM Flash memory see Appendix F Cables 7 telephone cable Connectors One RJ11 jack for a telephone line connection Humidity 20 90 non condensing Temperature 0 to 70 C 32 to 158 F Transmit Level 10...

Страница 96: ...Appendix A 4 A...

Страница 97: ...unication software and a Zypcom L Series modem to communicate with group 3 fax machines The fax identity and test commands are listed below Fax Identity Commands These commands are used by fax softwar...

Страница 98: ...nd is 3 FRM n Selects receive data modulation Modulation standards followed by ST represent short training Settings are 24 V 27ter 2400 48 V 27ter 4800 72 V 29 7200 73 V 17 7200 74 V 17ST 7200 96 V 29...

Страница 99: ...aining Settings are 24 V 27ter 2400 48 V 27ter 4800 72 V 29 7200 73 V 17 7200 74 V 17ST 7200 96 V 29 9600 97 V 17 9600 98 V 17ST 9600 121 V 17 12200 122 V 17ST 12200 145 V 17 14400 and 146 V 17ST 1440...

Страница 100: ...B Appendix B 4...

Страница 101: ...he telephone network and reaches the other modem The remote modem translates the analog signal received back to data demodulation and sends to the receiving end computer Fax Modem Normal modem can be...

Страница 102: ...for asynchronous data receiving and transmitting The normal UART device used in PC is NS16450 For high speed serial data receiving 38400 bps and up the PC may not be fast enough and data may get lost...

Страница 103: ...up defaults INIT Strings An initialization string is a series of specific commands that prepares a modem to operate with communications software Consult your communication software manual and AT comm...

Страница 104: ...0bps DTE to modem speeds AT commands 300 115200bps Fax mode DTE to modem speed FCLASS commands 19 200bps Voice mode DTE to modem speed FCLASS commands 19 200 115 200bps MNP Microcom Network Protocol i...

Страница 105: ...nds for Request To Send a handshake line in which the computer tells the modem it can accept new data CTS stands for Clear To Send which allows the modem to tell the computer that it can accept new da...

Страница 106: ...off hook to dial or answer and it remains off hook while you are connected On hook Hangs up a telephone receiver You are not connected to the Telephone Central Office when the modem is on hook DTMF Du...

Страница 107: ...new INF files mdmcir inf and serwvcir inf into the floppy drive The latest versions are on the BBS at Zypcom 510 783 2580 2 Click on START SETTINGS CONTROL PANEL MODEMS REMOVE to remove any modems lis...

Страница 108: ...r Cirrus Logic INF file If it does remove both files By removing these files Windows 95 will look at everything on the diskette without taking any shortcuts 5 Now you can install the new INFs Click on...

Страница 109: ...s the Properties button press the Connection tab press the Advanced button and check the box for Record Log File This will set up the system so that whenever you use the modem with Microsoft Phone a l...

Страница 110: ...D Appendix D 4...

Страница 111: ...ctions 3 In your communication software set the communication parameters to the following q 115 2 Kbps data connection modem to DTE q Parity none q Data bits 8 q Stop bits 1 q RTS CTS flow control 4 T...

Страница 112: ...continue the download procedure press the Page Up key 9 From the menu of download protocols choose R for the RAW ASCII downloading protocol 10 At the prompt Please enter filename enter the path and na...

Страница 113: ...or modem until after you see the END message If this happens you must re install downloadable code with the burning in procedure in Section II above 12 To see the version of firmware you ve downloade...

Страница 114: ...Appendix E 4 E...

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