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ECHNICAL

EFERENCE

8-3

Typing Commands

•

Type commands in either upper or lower case, not a combination. Use the Backspace key to delete errors. (You cannot
delete the original AT command since it is stored in the modem buffer.)

•

If a command has numeric options and you don’t include a number, zero is assumed. For example, if you type

ATB

, the

command

ATB0

is assumed.

•

Every command except

+++

, and

must begin with the AT prefix and be entered by pressing

ENTER

•

The maximum command length is 58 characters. The modem doesn’t count the AT prefix, carriage returns, or spaces.

NOTE:

All defaults are based on the &F1



Hardware Flow Control template loaded in NVRAM when the

modem is shipped. Defaults are listed in italics.

Содержание 3CP5613

Страница 1: ...3Com Corporation All rights reserved 3800 Golf Rd Rolling Meadows IL 60008 IMPORTANT In accordance with the ITU T standard for 56K transmissions V 90 U S Robotics 56 Kbps modems are capable of 56 Kbp...

Страница 2: ......

Страница 3: ...Robotics Modem 5 1 Uninstalling a Winmodem Modem 5 1 Uninstalling an Internal Faxmodem 5 2 Uninstalling an External Faxmodem 5 2 Troubleshooting and Help Resources 6 1 Problems and Solutions 6 1 Help...

Страница 4: ...ink Rates 28000 29333 30666 32000 33333 34666 36000 37333 38666 40000 41333 42666 44000 45333 46666 48000 49333 50666 52000 53333 54666 56000 57333 Back Channel Link Rates 4800 7200 9600 12000 14400 1...

Страница 5: ...l Panel This will erase any faxes you have in your inbox and delete your phone fax lists If you need to save them copy them to a new directory The Connections CD contains the RapidComm communications...

Страница 6: ...press the SPEAKER button If you do not hear your phone ring you may not have the telephone s cord plugged into the modem s PHONE jack If you are using your communications software to dial speakerphone...

Страница 7: ...you d like to say something without the receiving party hearing you you can press the MUTE button When you mute a call the ONLINE light will blink To turn off the mute feature press MUTE again The ON...

Страница 8: ...Installing the Wizard 1 Insert the Connections CD into your CD ROM drive 2 The Connections interface will appear automatically 3 Click Software 4 Click Modem Software 5 Click the Internet Update Wizar...

Страница 9: ...Select Winmodem 6 Click Properties 7 Choose the Port Settings tab and then click the Uninstall button 8 Windows displays the following message Warning you are about to remove this device from your sy...

Страница 10: ...modem you wish to remove 4 Click the Remove button 5 Shut down Windows 6 Remove the phone cords from the modem s TELCO or and PHONE or jacks If the modem is a voice modem remove any microphones or po...

Страница 11: ...move button 7 Remove the phone cords from the modem s TELCO or and PHONE or jacks 8 Shut down Windows CAUTION To avoid the risk of electric shock make sure your computer and all peripheral devices are...

Страница 12: ...e it s Trying to Connect to Another Modem but Fails 6 16 My Modem Isn t Achieving a 56K Internet Connection 6 17 Macintosh Modems 6 18 Basic Troubleshooting Steps 6 18 My Computer Isn t Recognizing my...

Страница 13: ...ls 6 32 My Modem Isn t Achieving a 56K Internet Connection 6 33 Internal PCI Modems 6 34 Basic Troubleshooting Steps 6 34 My Computer Isn t Recognizing my Modem 6 34 My Software Isn t Recognizing my M...

Страница 14: ...your modem other similar looking power supplies may be of different voltages and could damage your modem 3 Are you using the proper cable to connect your modem to your computer Make sure you are usin...

Страница 15: ...must use the power supply that came with your modem other similar looking power supplies may be of different voltages and could damage your modem When your modem is properly connected to power and is...

Страница 16: ...ossible that you may be plugging an external modem s cable into a disabled serial port Refer to your computer s manual for information about enabling COM ports This usually involves altering the BIOS...

Страница 17: ...ems Here you will see a list of installed modems You can also add remove or view the properties of modems from this window The 3Com U S Robotics modem you have installed should be present in the list...

Страница 18: ...modem s phone cord into a digital line which can damage your modem Call your phone company if you are unsure whether or not your phone line is digital If your phone system requires dialing 9 to acces...

Страница 19: ...RESOURCES 6 8 Windows 98 Windows NT Possible solution Make sure the DIP switches on the back of your modem are set correctly DIP switches 3 5 and 8 should be in the down position See the diagram below...

Страница 20: ...56K connection and contain only one analog to digital conversion The 56K signal from your ISP begins as a digital signal Somewhere between the ISP and your modem there will be a analog to digital sign...

Страница 21: ...3 Are you using the proper cable to connect your modem to your computer If you are using your modem as a USB device you will to need to purchase a USB A to B cable If you are using your modem as a ser...

Страница 22: ...turned on If it is check the outlet with another electric device like a lamp to be sure that you are getting power Also you must use the power supply that came with your modem other similar looking po...

Страница 23: ...Device Manager tab If your USB is enabled there will be a USB icon Universal serial bus controller under Computer See the picture below for an example of how the USB icon appears in Device Manager If...

Страница 24: ...another device Click Windows Start Settings and Control Panel and then double click Modems Look for another modem already in the machine If there is another modem installed click the Diagnostics tab...

Страница 25: ...Guide that came with your modem There should be a place in the Setup section of your software for port settings Possible solution You may not have the correct modem type selected in your software or...

Страница 26: ...ur modem s box if possible Possible solution You may have devices between the modem and the phone jack There should be no line splitters fax machines or other devices between the modem and the wall ja...

Страница 27: ...AND HELP RESOURCES 6 16 Possible solution You may have a poor connection All calls are routed differently so try placing the call again You may see one of the following error messages Windows 95 Windo...

Страница 28: ...56K connection and contain only one analog to digital conversion The 56K signal from your ISP begins as a digital signal Somewhere between the ISP and your modem there will be a analog to digital sign...

Страница 29: ...sure you are getting power 3 Are you using the proper cable to connect your modem to your computer Make sure you are using a hardware handshaking cable which is packaged with your modem 4 If there ar...

Страница 30: ...odem Possible solution Your communications software may not function properly if you have more than one version of the software installed you are using an older version or you have more than one commu...

Страница 31: ...ack The phone cord should be plugged into the jack on the modem and into the wall phone jack Use the phone cord included in your modem s box if possible Possible solution You may have devices between...

Страница 32: ...P switches on the back of your modem are set correctly DIP switches 1 3 5 and 8 should be in the down position See the diagram below for the proper settings PROBLEM My modem isn t achieving a 56K Inte...

Страница 33: ...o digital signal conversion in the path from your ISP to your modem If more than one analog to digital conversion occurs your connect speeds will default to V 34 33 6 There may also be impairments on...

Страница 34: ...his product Check your modem s original box to find out which operating systems are supported PROBLEM My computer isn t recognizing my modem Possible solution Make sure that your modem is installed co...

Страница 35: ...you have experienced The steps need to be followed exactly for a successful installation PROBLEM My software isn t recognizing my modem Possible solution Your communications software may not function...

Страница 36: ...alls FOR BOTH DIALING AND ANSWERING PROBLEMS Possible solution You may have a bad phone cord connection to your modem or your phone cord may be plugged into the wrong jack The phone cord should be plu...

Страница 37: ...d when messages are waiting Retrieve your voice mail to restore your normal dial tone PROBLEM My modem sounds like it s trying to connect to another modem but fails Possible solution You may have a po...

Страница 38: ...ing a 56K connection and contain only one analog to digital conversion The 56K signal from your ISP begins as a digital signal Somewhere between the ISP and your modem there will be a analog to digita...

Страница 39: ...ter isn t recognizing my modem Possible solution You may be using an IRQ that is already in use To work properly your modem needs to be assigned to a free IRQ Windows 95 98 If you set your modem s jum...

Страница 40: ...ows NT Users section on the other side of this Guide for more information If there are no IRQs available you may have to remove disable or relocate another device in order to free an IRQ for use by yo...

Страница 41: ...lace in the Setup section of your software that addresses port settings Make sure the software s port settings match those for your modem See the Installation Guide that came with your modem for an ex...

Страница 42: ...solution You may have a bad phone cord connection to your modem or your phone cord may be plugged into the wrong jack The phone cord should be plugged into the jack on the modem and into the wall phon...

Страница 43: ...ered when messages are waiting Retrieve your voice mail to restore your normal dial tone PROBLEM My modem sounds like it s trying to connect to another modem but fails Possible solution You may have a...

Страница 44: ...56K connection and contain only one analog to digital conversion The 56K signal from your ISP begins as a digital signal Somewhere between the ISP and your modem there will be a analog to digital sign...

Страница 45: ...your modem for complete instructions PROBLEM My computer isn t recognizing my modem Possible solution You may be using an IRQ that is already in use To work properly your modem needs to be assigned to...

Страница 46: ...modem Refer to that device s documentation for more information about removing disabling or relocating it Possible solution You may be using a COM port address that is either already in use or not con...

Страница 47: ...ur communication software s documentation for instructions on adjusting the port settings in your software Possible solution You may not have the correct modem type selected in your software or in Win...

Страница 48: ...re should be no line splitters fax machines or other devices between the modem and the wall jack OFFICE USERS Possible solution You may have plugged your modem s phone cord into a digital line Contact...

Страница 49: ...ntly support The telephone line between your ISP and your modem must be capable of supporting a 56K connection and contain only one analog to digital conversion The 56K signal from your ISP begins as...

Страница 50: ...call specify your modem serial number found on the modem and on the outside of the box the software being used and if possible have the contents of your ati7 screen available Customer Support via the...

Страница 51: ...l permission Service available in the U S only If You Need to Return the Modem to 3Com for Repair Contact 3Com Customer Support If the support representative determines that you need to return the mod...

Страница 52: ...k up the phone line when it detects a certain number of rings See S register S0 in the Technical Reference chapter of this manual auto dial A process where your modem dials a call for you The dialing...

Страница 53: ...hnique consisting of a test performed on each block or frame of data by both sending and receiving modems The sending modem inserts the results of its tests in each data block in the form of a CRC cod...

Страница 54: ...ital signals from the computer or terminal and immediately returns the data to the screen for verification digital signals Discrete uniform signals In this manual the term refers to the binary digits...

Страница 55: ...et for a fee ITU T An international organization that defines standards for telegraphic and telephone equipment For example the Bell 212A standard for 1200 bps communication in North America is observ...

Страница 56: ...al loopback A test that checks the phone link and a remote modem s transmitter and receiver remote echo A copy of the data received by the remote system returned to the sending system and displayed on...

Страница 57: ...standard that extends the V 32 connection range 4800 7200 9600 12 000 and 14 400 bps V 32 bis modems fall back to the next lower speed when line quality is impaired fall back further as necessary and...

Страница 58: ...ion commonly found in modem connections x2 connections require a modem with x2 technology calling a digitally connected Internet Service Provider or corporate host site compatible with x2 technology X...

Страница 59: ...8 2 Top of the Case Lights Voice Faxmodem Pro Externals 8 2 Typing Commands 8 3 Basic Data Commands 8 4 Extended Data Commands 8 8 DIP Switches 8 12 S Registers 8 13 Fax Commands 8 20 Screen Messages...

Страница 60: ...rminal Ready ON if modem receives a DTR signal from computer Always ON modem ignores DTR if the DTR override is ON D0 CS Clear to Send ON until modem lowers CTS when Transmit Data hardware flow contro...

Страница 61: ...ions and you don t include a number zero is assumed For example if you type ATB the command ATB0 is assumed Every command except A and A must begin with the AT prefix and be entered by pressing ENTER...

Страница 62: ...mand prefix except with A and A Use alone to test for OK result code Bn U S ITU T answer sequence B0 ITU T answer sequence B1 U S answer tone Dn Dials the specified phone number Includes the following...

Страница 63: ...Nonvolatile memory NVRAM settings I6 Link diagnostics I7 Product configuration I9 Plug and Play information I11 Extended link diagnostics Ln Controls speaker volume internals only L0 Low volume L1 Low...

Страница 64: ...43 CONNECT 16800 85 CONNECT 19200 91 CONNECT 21600 99 CONNECT 24000 103 CONNECT 26400 107 CONNECT 28800 151 CONNECT 31200 155 CONNECT 33600 Result Codes X0 X1 X2 X3 X4 256 CONNECT 28000 260 CONNECT 2...

Страница 65: ...y configuration 0 Y3 Use factory configuration 1 Y4 Use factory configuration 2 Z Resets modem Z0 Resets modem to NVRAM profile selected by Y command or dip 7 Z1 Resets modem to NVRAM profile 0 Z2 Res...

Страница 66: ...rammable factory configuration F0 Generic template F1 Hardware flow control template F2 Software flow control template Gn Sets Guard Tone G0 No guard tone U S and Canada G1 550 Hz guard tone some Euro...

Страница 67: ...0 bps N6 9600 bps N7 12 000 bps N8 14 400 bps N9 16 800 bps N10 19 200 bps N11 21 600 bps N12 24 000 bps N13 26 400 bps N14 28 800 bps N15 31 200 bps N16 33 600 bps Note N17 through N39 apply only to...

Страница 68: ...ector T8 Analog Loopback with self test and error detector Un With n 0 sets the floor connect speed lowest acceptable connection speed Note If your modem cannot connect to the remote modem at or above...

Страница 69: ...figuration to NVRAM templates W0 Modifies the NVRAM 0 template Y0 W1 Modifies the NVRAM 1 template Y1 Yn Sets break handling Y0 Destructive but doesn t send break Y1 Destructive expedited Y2 Nondestru...

Страница 70: ...OFF Suppresses result codes ON Enables result codes 4 OFF Command Mode Local Echo Suppression OFF Displays keyboard commands ON Suppresses echo 5 ON Auto Answer Suppression OFF Modem answers on first...

Страница 71: ...s delete function S6 2 Sets number of seconds modem waits before dialing If Xn is set to X2 or X4 this is time out length if no dial tone S7 60 Sets number of seconds modem waits for a carrier May be...

Страница 72: ...t position 0 5 32 Reserved 6 64 Disable quick retrains 7 128 Disconnect on escape code The 1 5K byte non MNP buffer allows data transfer via XModem and YModem file transfer protocols without flow cont...

Страница 73: ...o change a setting use ATSr n where r is the register and n is a decimal value from 0 255 unless otherwise indicated Register Default Function 8 15 Note To disable V 42 detect phase select sum of bits...

Страница 74: ...ity timer This timer activates when there is no data activity on the phone line at time out the modem hangs up S19 0 disables the timer S20 0 Reserved S21 10 Sets length in 10 millisecond units of bre...

Страница 75: ...modulation 3 8 Disables 2100 Hz answer tone to allow two V 42 modems to connect faster 4 16 Enables V 23 fallback mode 5 32 Disables V 32bis mode 6 64 Disable V 42 selective reject 7 128 Software com...

Страница 76: ...all Indicate enabled 1 2 Enables V 8 mode 2 4 Reserved 3 8 Disable V 34 modulation 4 16 Disable V 34 modulation 5 32 Disable x2 modulation 6 64 Disable V 90 modulation 7 128 Reserved S33 0 Bit mapped...

Страница 77: ...D trellis encoding 4 16 Disable non linear coding 5 32 Disable TX level deviation 6 64 Disable Pre emphasis 7 128 Disable Pre coding S35 S37 Reserved S38 0 Sets an optional delay in seconds before a f...

Страница 78: ...lt Function 8 20 S41 0 Bit mapped register setup To set registers see instructions for S13 Bit Value Result 0 1 Distinctive ring enabled 1 2 Speakerphone connect message override voice products only 2...

Страница 79: ...nce is detected or when the user types anything which is ignored FTM n Transmits data using the modulation specified by n n 3 24 48 72 96 97 98 121 122 145 or 146 Note See the Screen Messages table at...

Страница 80: ...the receipt of a network altering ring 3 NO CARRIER No carrier is being received from the modem 4 ERROR The previous command line has not been recognized or was completed abnormally 6 NO DIAL Optiona...

Страница 81: ...f a shielded cable when connecting a modem to a computer to ensure minimal interference with radio and television Pin assignments are factory set in the U S Robotics modem to match the standard DB 25...

Страница 82: ...ence Number REN You must provide this information to the telephone company if requested The REN is used to determine the number of devices you may legally connect to your telephone line In most areas...

Страница 83: ...g device in accordance with the specifications in Part 15 of FCC rules which are designed to provide reasonable protection against such interference in a residential installation This equipment genera...

Страница 84: ...y s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with...

Страница 85: ...for ninety 90 days from shipment or the remainder of the initial warranty period whichever is longer YEAR 2000 WARRANTY In addition to the Warranty stated above 3Com warrants that each product sold o...

Страница 86: ...data of Customer contained in stored on or integrated with any products returned to 3Com for repair whether under warranty or not WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED A...

Страница 87: ...HASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE DISCLAIMER Some countries states or pro...

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