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AT Command Set

B-2

DTR control (AT &D0)

&D0 causes ISDN modem to ignore DTR
from host.

&D1 causes ISDN modem to enter
command state on detecting on-off
transition of DTR.

&D2 causes ISDN modem to hang up
current calls upon on-off transition of DTR
and prepares serial port to accept AT
command at any speed (default).

AT command echo (AT E0)

E0 disables the echo of AT commands
back to the host computer.

E1 enables the echo of AT commands to
the host computer (default).

Restore factory defaults (AT &F)

Restores all factory default settings.

Hang up (AT H)

Hangs up the current connections.

Identification (AT I0)

I0 displays the model number.

I1 displays the flash memory checksum.

I2 computes and compares the flash
memory checksum to a prestored value.

I3 displays the product name and release
number.

Enter connect state (AT O)

Causes the ISDN modem to go out of
command mode into on-line mode.

Result code control (AT Q0)

Q0 enables the output of result codes
(default).

Q1 disables the output of result codes.

Q2 disables the output of result codes in
answer mode only.

Serial port flow control (AT \Q1)

\Q0 disables flow control.

\Q1 enables bidirectional XON/XOFF
software flow control.

\Q3 enables bidirectional RTS/CTS
hardware flow control (default).

Read all S registers (AT %R)

Provides an output list of all S registers.

Serial number

Displays serial number of ISDN modem.

Sn?

Read configuration register
(AT S60?)

Reads a specific S register setting.

(continued)

Table B-1

AT Command Set Summary (continued)

Command Function (Example)

Description

Содержание Impact IQ 3C882

Страница 1: ... 3COMIMPACT IQ EXTERNAL ISDN MODEM USER GUIDE Part No 09 0885 000 Published July 1996 ...

Страница 2: ...cial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished rights reserved under the copyright laws of the United States The software described in this documentation is furnished under a license agreement included with the product either as a separate document or on the softwar...

Страница 3: ...that the 3ComImpact IQ External ISDN modem has a 5 Year limited warranty on the hardware in lieu of the standard 1 year warranty The software for the 3ComImpact IQ External ISDN Modem has a 90 day warranty as further specified in the Limited Warranty statement To ensure the very best 3Com service and support take the time to register on line or complete the product registration card ...

Страница 4: ...Features 1 4 Upgradability 1 4 Diagnostics 1 4 Warranty 1 4 3C882 ISDN Modem Package Contents 1 5 Before You Install the 3C882 ISDN Modem 1 5 IBM PC or Compatible Requirements 1 6 Apple Macintosh Requirements 1 6 ISDN Information 1 7 2 INSTALLING THE 3C882 ISDN MODEM Familiarizing Yourself with the 3C882 ISDN Modem 2 2 Installing a Serial Cable 2 4 Installing the ISDN Cable 2 5 Installing Analog E...

Страница 5: ... Computer 4 1 Installing the 3C882 Software 4 2 Running SPID Wizard 4 4 Configuring Multilink PPP 4 9 Configuring the B Channel Rate 4 10 Configuring Voice Call Routing 4 10 Verifying the Configuration 4 12 5 ADVANCED CONFIGURATION Advanced Configuration Parameter Default Values 5 1 Changing The Parameter Settings 5 4 6 PLACING AND RECEIVING CALLS Placing ISDN Data Calls 6 1 Placing Calls Automati...

Страница 6: ...DN SERVICE Placing the ISDN Order Through 3Com A 1 Placing the ISDN Order Through Your Telephone Company A 1 AT T 5ESS Switch NI1 A 3 AT T 5ESS Custom Switch A 4 NorthernTelecomDMS 100 Switch A 5 Siemens EWSD Switch A 6 B AT COMMANDS S REGISTERS AND RESULT CODES AT Command Set B 1 S Registers B 4 Result Codes B 8 C SPECIFICATIONS 3C882 ISDN Modem Specifications C 1 RS 232 COM Port Pin Specificatio...

Страница 7: ...Web Site E 2 3ComForum on CompuServe E 3 3ComFacts Automated Fax Service E 3 Support from Your Network Supplier E 4 Support from 3Com E 4 Returning Products for Repair E 4 GLOSSARY INDEX LIMITED WARRANTY 3COM END USER SOFTWARE LICENSE AGREEMENT FCC CLASS B CERTIFICATION STATEMENT CANADIAN NOTICE ...

Страница 8: ... 4 SPID Wizard Start Message for PC 3 3 3 5 First Telephone Number Dialog Box for PC 3 4 3 6 Second Telephone Number Dialog Box for PC 3 5 3 7 Successful Configuration Dialog Box 3 5 3 8 Configuration Dialog Box for PC 3 6 3 9 Voice Call Routing Default Setting 3 9 3 10 Configuration for One Telephone Number per Device 3 10 3 11 Configuration for One Telephone Number Two Devices 3 11 3 12 New Hard...

Страница 9: ...7 Select Modem Port Screen 4 4 4 8 SPID Wizard Start Screen 4 5 4 9 Switch Detection Status Screen for Macintosh 4 6 4 10 First Telephone Number Screen for Macintosh 4 6 4 11 Second Telephone Screen for Macintosh 4 7 4 12 Successful Configuration Screen 4 8 4 13 Configuration Dialog Box for Macintosh 4 8 4 14 Voice Call Routing Default Setting 4 10 4 15 Configuration for One Telephone Number per D...

Страница 10: ... A 2 A 2 Line Configuration for AT T 5ESS NI1 A 3 A 3 Line Configuration for AT T 5ESS Custom A 4 A 4 Line Configuration for DMS 100 A 5 A 5 Line Configuration for Siemens EWSD A 6 B 1 AT Command Set Summary B 1 B 2 S Registers B 4 B 3 3C882 ISDN Modem Result Codes B 8 C 1 Pin Descriptions C 2 C 2 PC COM Port Cable Pin Assignments C 3 C 3 Macintosh COM Port Cable Pin Assignments C 3 ...

Страница 11: ...r Turn to General information Chapter 1 Instructions for installation Chapter 2 Instructions for configuration for an IBM or compatible PC Chapter 3 Instructions for configuration for a Macintosh computer Chapter 4 Advanced configuration Chapter 5 Instructions for placing and receiving data and voice calls Chapter 6 Troubleshooting tips Chapter 7 Instructions for ordering ISDN service Appendix A T...

Страница 12: ...red to in the text they are called out by their labels such as the Return key or the Escape key or they may be shown as Return or Esc If two or more keys are to be pressed simultaneously the keys are linked with a plus sign for example Press Ctrl Alt Del Italics Italics are used to denote new terms or emphasis Table 2 Notice Icons Icon Type Description Information Note Information notes call atten...

Страница 13: ...upports both IBM or IBM compatible PCs and Apple Macintosh computers The 3C882 ISDN modem is designed for users who require high speed access to the Internet Intranet on line information services or corporate local area networks LAN A typical 3C882 ISDN modem application is shown in Figure 1 1 Figure 1 1 Network Access with the 3C882 ISDN Modem 3ComImpact IQ External ISDN Modem Internet Intranet o...

Страница 14: ...imultaneously For example you can send a fax or place a voice telephone call while maintaining a high speed connection to the office LAN you can also send or receive a voice telephone call while you are connected to the Internet The 3C882 ISDN modem can be connected to any compatible UL listed computer that includes RS 232 compliant serial ports 3C882 ISDN Modem Features The 3C882 ISDN modem provi...

Страница 15: ...FC 1717 which creates a single digital network connection of up to 128 Kbps 56K TollSaver which places a data call over a voice connection saving you the additional charge for a data call Protocols ANSI V 120 rate adaption Async Sync PPP feature which automatically converts asynchronous PPP into synchronous HDLC based PPP ISDN IETF PPP RFC 1661 IETF Multilink PPP ISDN Caller ID ISDN Standards and ...

Страница 16: ...u to place or receive a voice call while a Multilink PPP call is active Two analog voice ports for attaching analog telephone equipment touch tone or cordless telephones fax and answering machines and analog modems to the ISDN line Flexible call routing to the two analog ports Upgradability Flash memory for field firmware updates Firmware posted on 3Com s ftp and BBS sites Diagnostics LED status d...

Страница 17: ...rrect ISDN service installed at your location with an available ISDN RJ 11 outlet If you have not ordered ISDN service yet see Appendix A ISDN configuration information Fill out the ISDN Information Sheet in the ISDN Information section of this chapter A computer that meets UL standards in the United States or is certified to CSA standards in Canada Refer to the section IBM PC or Compatible Requir...

Страница 18: ...ns port For 230 4 Kbps data rate You will need an enhanced serial port card and COM port driver software which support 230 4 Kbps For 115 2 Kbps data rate 3Com recommends that your IBM or IBM compatible PC serial COM port be equipped with a 16C550 UART universal asynchronous receiver transmitter To determine what UART is installed in your PC run the Microsoft Diagnostic Program msd from the DOS pr...

Страница 19: ...the switch type and SPID s if any were assigned You may need to refer to this information for technical support If necessary ask your telephone company ISDN representative for the ISDN information Figure 1 2 ISDN Information Sheet ISDN Information Sheet 3ComImpact IQ ISDN Modem ISDN Switch Type AT T 5ESS NI1 AT T 5ESS Custom Northern Telecom DMS 100 Siemens EWSD Number of Telephone Numbers 1 or 2 ...

Страница 20: ...lephone number write 1 If you ordered two ISDN telephone numbers write 2 ISDN Telephone Number 1 Write down your ISDN telephone number provided to you by the telephone company ISDN representative ISDN Telephone Number 2 Write the second ISDN phone number if you ordered two ISDN telephone numbers for your line SPID Number If required by your telephone company fill in the SPID number for each ISDN p...

Страница 21: ... Macintosh or IBM compatible computer If you are not refer to the user guide that accompanied your computer for instructions on hardware installation and operating system commands The main hardware installation steps are depicted in Figure 2 1 Figure 2 1 Installation Steps for the 3C882 ISDN Modem Install serial cable Install power cable Install ISDN cable Install analog equipment optional Familia...

Страница 22: ... panel and back panel of the 3C882 ISDN modem prior to installation The LED status display shown in Figure 2 2 consists of eight front panel LEDs that are described in Table 2 1 Figure 2 2 Front Panel LED Indicators Figure 2 3 shows the back panel Figure 2 3 Back Panel Connectors PWR TEST D B1 B2 SD RD DTR 3ComImpact IQ TM 3 Com RESET 9 VDC 6A MAX RS 232 ISDN U 1 2 ...

Страница 23: ...ures are not properly established Remains lit if the physical ISDN interface is not synchronized or is disconnected B1 Amber or green B1 Channel Activity Green indicates a circuit switched data call in progress Amber indicates a circuit switched voice call in progress If a call is in a dialing state the LED flashes When the call is disconnected the LED goes off B2 Amber or green B2 Channel Activit...

Страница 24: ...e pin specifications provided in Appendix C For a PC you will need the 25 pin male to 9 pin female serial cable that was provided For PCs with a 25 pin serial port connector you will need to purchase a standard 9 pin to 25 pin adapter To install the 3C882 ISDN modem serial cable 1 Insert the 25 pin male end of a serial signal cable into the RS 232 serial port on the 3C882 ISDN modem s back panel a...

Страница 25: ...i DIN 8 pin serial connector depicted by the telephone handset Installing the ISDN Cable To install the ISDN cable 1 Connect the RJ 45 8 pin connector end of the RJ 45 RJ 11 ISDN cable to the RJ 45 ISDN line port labeled ISDN U on the 3C882 ISDN modem s back panel as shown in Figure 2 5 Figure 2 5 ISDN Cable Connection 2 Connect the RJ 11 6 pin connector end of the RJ 45 RJ 11 ISDN cable to the RJ...

Страница 26: ...le for each analog phone port connection To install an analog device 1 Insert one RJ 11 connector to a phone port labeled with a telephone icon on the back of the ISDN modem as shown in Figure 2 6 Figure 2 6 Analog Equipment Connection 2 Insert the other RJ 11 end into the appropriate RJ 11 port on the analog device 3 If you have another analog device to install repeat steps 1 and 2 RESET 9 VDC 5A...

Страница 27: ...ese three devices on up to 200 feet of AWG 26 or heavier AWG wiring Although the 3C882 ISDN modem may function satisfactorily at longer cable distances with more than two attached telephones proper operation at longer cable distances is not guaranteed in all situations Specialized telephone equipment such as speaker phones that draw large amounts of power may not work on the 3C882 ISDN modem s Pho...

Страница 28: ...rmer end of the power cable into a surge protected standard 110 VAC wall outlet The indicator LEDs on the front panel see Figure 2 2 flash momentarily as the unit undergoes a power up self test diagnostic This completes the 3C882 ISDN modem installation Go to the appropriate chapter to configure the 3C882 ISDN modem either Chapter 3 Configuration for an IBM Compatible PC or Chapter 4 Configuration...

Страница 29: ... are as follows Configuring the 3C882 ISDN modem Setup Using Windows 95 Setup Using Windows NT RAS For instructions on using the DOS operating system refer to Appendix D Configuring the 3C882 ISDN Modem for a PC The main steps are shown in Figure 3 1 Figure 3 1 Main 3C882 Configuration Steps for a PC Install 3C882 software Run SPID Wizard Configure Multilink PPP B channel rate voice call routing V...

Страница 30: ...3 x select Run from the File menu In the Run dialog box shown in Figure 3 2 type a setup Figure 3 2 Run Dialog Box 3 Click OK After the configuration program is copied to the hard disk the readme file opens Review the information and then close the file A message confirms installation is complete If you are running Windows 3 x a message box appears and asks you whether you want to install a COM po...

Страница 31: ...le click the 3ComImpact IQ 3 0 icon shown in Figure 3 3 Figure 3 3 3ComImpact IQ Globe Icon You will see a start message as shown in Figure 3 4 Figure 3 4 SPID Wizard Start Message for PC If you do not want to run the SPID Wizard click Cancel The Configuration dialog box appears see Figure 3 8 Select your ISDN switch type and then enter the telephone number s and if required enter the correspondin...

Страница 32: ...n Figure 3 5 Figure 3 5 First Telephone Number Dialog Box for PC 2 Enter the first telephone number for your ISDN line 3 Click Next A message appears indicating that the 3C882 ISDN modem is detecting the SPID for the first telephone number After the SPID is configured the dialog box shown in Figure 3 6 appears ...

Страница 33: ... Box for PC 4 If you have a second telephone number for your ISDN line enter it and then click Next If not leave the field incomplete and then click Done After successful configuration of your switch type and SPID number s Figure 3 7 appears Figure 3 7 Successful Configuration Dialog Box ...

Страница 34: ...og box appears as shown in Figure 3 8 Figure 3 8 Configuration Dialog Box for PC A message bar at the bottom of the dialog box provides status information about the 3C882 ISDN modem The Configuration dialog box buttons do the following Help Click the Help button to access help for the Configuration dialog box There is also comprehensive on line help accessible from the 3ComImpact IQ ISDN modem pro...

Страница 35: ...e Update Click the Update button to download the current configuration parameters to your ISDN modem s S registers After you click the Update button the name changes to Updated to indicate that the change was made Exit Click Exit to leave the Configuration dialog box Running SPID Wizard Again The SPID Wizard automatically runs when you are configuring the 3C882 ISDN modem for the first time or if ...

Страница 36: ...es a method for combining multiple PPP connections Multilink PPP combines the two ISDN B channels creating a virtual single digital connection of up to 128 Kbps Note that the destination you are dialing must also support Multilink PPP or the dual channel link will not occur and you will get a single B channel connection By default Multilink PPP is enabled To enable or disable Multilink PPP do the ...

Страница 37: ...xample using the default setting is shown in Figure 3 9 Figure 3 9 Voice Call Routing Default Setting By default all Phone Port boxes are checked This allows calls to and from both ISDN telephone numbers to ring both devices simultaneously You may want to exclusively assign a telephone number to a device Instructions for configuring two common scenarios is as follows RES ET 9 VD C 5A MAX RS 232 IS...

Страница 38: ... for your ISDN line and two analog devices check the Phone Port 1 and Phone Port 2 boxes located in the Number 1 group box as shown in Figure 3 11 Calls to that telephone number will ring both devices allowing you to answer a call using either one Note that while you are using the fax machine for example you cannot use the telephone to place or receive calls because your ISDN line has only one tel...

Страница 39: ...gister Verifying the Configuration Check the status bar located toward the bottom of the Configuration dialog box If the parameters were configured accurately and the 3C882 ISDN modem is ready to send and receive calls the status bar fields will appear as shown here Layer 1 UP SPID 1 Init if required TEI 1 Number from 64 to 126 SPID 2 Init if required TEI 2 Number from 64 to 126 if required RES ET...

Страница 40: ...e ISDN modem configuration procedure For Windows 3 x users go to Chapter 5 Advanced Configuration and review the default settings to ensure that they reflect your preferences If you prefer not to change the default settings go on to Chapter 6 Placing and Receiving Calls If you are using Windows 95 or Windows NT Remote Access Service RAS refer to the appropriate section Setup Using Windows 95 or Se...

Страница 41: ...lus and the 3C882 ISDN modem software have already been installed 1 Reboot your PC with the 3C882 ISDN modem powered up and physically connected to your PC The New Hardware dialog box appears shown in Figure 3 12 Figure 3 12 New Hardware Dialog Box 2 Select the Driver from disk provided by hardware manufacturer option 3 Click OK The Install From Disk dialog box appears as shown in Figure 3 13 ...

Страница 42: ...all From Disk Dialog Box 4 Insert the 3ComImpact IQ Windows DOS Installation Diagnostic Utilities diskette into an available floppy drive 5 Click OK The Select Device dialog box appears as shown in Figure 3 14 Figure 3 14 Select Device Dialog Box ...

Страница 43: ... rates up to 115 2 Kbps the process is complete Go to Chapter 5 Advanced Configuration to review the default settings and ensure that they reflect your preferences If you prefer not to change the default settings then go on to Chapter 6 Placing and Receiving Calls 7 From the Control Panel dialog box double click on the Modems icon The Modems Properties dialog box appears 8 Click Add The Install Ne...

Страница 44: ...shown in Figure 3 16 appears Figure 3 16 Modem Manufacturers and Models Dialog Box 11 From the Manufacturers list box select 3COM 12 From the Models list box select 3ComImpact IQ 230K 13 Click Next 14 Select the appropriate COM port 15 Click Next A dialog box indicates successful setup 16 Click Finish This completes the setup procedure ...

Страница 45: ...dem using Windows NT RAS version 3 5 1 1 Using the File Manager locate the Windows NT MODEM INF file in the SystemRoot System32 RAS directory and rename it MODEM ORG For example if your root directory is windows you would look for the Windows NT MODEM INF file in the following directory C windows System32 RAS 2 Copy the 3C882 ISDN modem MODEM INF file to the same directory as the MODEM ORG file 3 ...

Страница 46: ...From the Installed Network Software list box select Remote Access Service and then click Configure The Remote Access Setup dialog box appears as shown in Figure 3 18 Figure 3 18 Remote Access Setup Dialog Box 5 If a modem is already configured select it and then click Remove ...

Страница 47: ...230 4 Kbps and then specify the port usage Click OK The Remote Access Setup dialog box appears 10 Click Continue 11 Click OK to exit the Network Settings dialog box The Network Settings Change alert box appears 12 Click Restart Now Once your computer has rebooted you are ready to use the 3C882 ISDN modem Go to Chapter 5 Advanced Configuration to review the default settings and ensure that they ref...

Страница 48: ...the ISDN telephone numbers from the ISDN Information Sheet you completed in Chapter 1 Configuring the 3C882 ISDN Modem for a Macintosh Computer The main steps are shown in Figure 4 1 Figure 4 1 Main 3C882 Configuration Steps for a Macintosh Install 3C882 software Run SPID Wizard Configure Multilink PPP B channel rate voice call routing Verify configuration ...

Страница 49: ...er 1 Insert the 3ComImpact IQ Installer Diagnostic Utilities software utility diskette into the floppy drive and then double click the diskette icon 2 Double click the 3ComImpact IQ Installer icon shown in Figure 4 2 Figure 4 2 3ComImpact IQ Installer Icon A message box appears 3 Click Continue Figure 4 3 appears Figure 4 3 Installation Confirmation Message Box ...

Страница 50: ...elect the location on your hard drive where you would like the 3ComImpact IQ folder If you do not want to use the default folder name change the name Click Install After all of the 3ComImpact IQ ISDN modem software is installed Figure 4 5 appears Figure 4 5 Successful Installation Message Box 6 Click OK This completes the software installation procedure ...

Страница 51: ... ISDN modem to a different ISDN line After the ISDN switch type telephone number s and SPID s are configured clicking on the 3ComImpact IQ program icon causes the Configuration dialog box to be displayed You will need the ISDN telephone numbers from the ISDN Information Sheet you completed in Chapter 1 1 Double click the 3ComImpact IQ 3 0 program icon shown in Figure 4 6 Figure 4 6 3ComImpact IQ P...

Страница 52: ... If you do not want to run the SPID Wizard click Cancel The Configuration dialog box appears see Figure 4 13 Select your ISDN switch type and then enter the telephone number s and if required enter the corresponding SPID s for your ISDN line Refer to the section Configuring Multilink PPP 3 Click Next The SPID Wizard first checks for ISDN layer 1 status and then configures the switch type The statu...

Страница 53: ...Macintosh Computer 4 6 Figure 4 9 Switch Detection Status Screen for Macintosh After the switch type is configured the First Telephone Number dialog box appears as shown in Figure 4 10 Figure 4 10 First Telephone Number Screen for Macintosh ...

Страница 54: ...econd Telephone Screen for Macintosh 5 If your ISDN line has a second telephone number assigned to it enter it here and then click Next If it does not have a second telephone number assigned to it leave the field as is and then click Done If you entered a second telephone number for your ISDN line the SPID for the second telephone number is configured A message box indicates that the configuration...

Страница 55: ...cessful Configuration Screen 6 Click Done The on line registration dialog box appears Enter your information and then click Register Now After your information is sent the Configuration dialog box appears as shown in Figure 4 13 Figure 4 13 Configuration Dialog Box for Macintosh ...

Страница 56: ...es a method for combining multiple PPP connections Multilink PPP combines the two ISDN B channels creating a virtual single digital connection of up to 128 Kbps Note that the destination you are dialing must also support Multilink PPP or the dual channel link will not occur and you will get a single B channel connection By default Multilink PPP is enabled To enable or disable Multilink PPP do the ...

Страница 57: ...ault setting An example using the default setting is shown in Figure 4 14 Figure 4 14 Voice Call Routing Default Setting By default all Phone Port boxes are checked This allows calls to and from both ISDN telephone numbers to ring both devices simultaneously You may want to exclusively assign a telephone number to a device Instructions for configuring two common scenarios is as follows RES ET 9 VD...

Страница 58: ...ne Port 2 boxes as shown in Figure 4 16 Calls to that telephone number will ring both devices allowing you to answer a call using either one Figure 4 16 Configuration for One Telephone Number Two Devices RES ET 9 VD C 5A MAX RS 232 ISDN U 1 2 908 555 1212 908 555 1213 Number 1 Telephone Number Service Profile Identifier SPID 9085551212 015551212000 Number 2 Telephone Number Service Profile Identif...

Страница 59: ...lephone Number 2 3 Click the Update Configuration button to download the change to your 3C882 ISDN modem s S register Verifying the Configuration Check the status bar located toward the bottom of the Configuration dialog box to verify correct configuration If the parameters were configured accurately and the 3C882 ISDN modem is ready to send and receive calls the status bar fields will appear as s...

Страница 60: ... the Update Configuration button to update this information to the 3C882 ISDN modem 3 Click Quit to exit the Configuration dialog box This completes the 3C882 ISDN modem configuration Go to Chapter 5 Advanced Configuration to review the default settings and ensure that they reflect your preferences If you prefer not to change the default settings then go on to Chapter 6 Placing and Receiving Calls...

Страница 61: ...tems For Macintosh users terminal emulation software was installed in the 3ComImpact IQ folder during software installation The advanced configuration parameters and their default settings are as follows Auto Answer disabled Baud Rate automatic detection of rates up to 115 2 Kbps Compression enabled Dynamic Bandwidth Allocation enabled QuickSelect enabled Each parameter is described in detail in t...

Страница 62: ...oice call comes in or if you lift the handset to place a call while you have both B channels in use because of Multilink PPP one of the B channels is temporarily removed from the Multilink PPP call and is used for the voice call Once the voice call ends that B channel is automatically returned to the Multilink PPP call Although throughput is reduced while the voice call is active the reliability o...

Страница 63: ...od The following check modes are negotiable None One Byte Sequence Number and Extended Extended is the preferred choice The degree of compression depends on the type of file being transferred For example a text only file compresses better than a file with graphics Compression is enabled default and will automatically be invoked unless you are running compression on your computer If you are running...

Страница 64: ...ctions on how to send AT commands refer to the section Changing The Parameter Settings 3 Change the setting of your application program to 230400 bps This completes the procedure to change the baud rate to 230 4 Kbps Changing The Parameter Settings To change parameter settings 1 Launch your communications or terminal emulation software Be sure your communications software is in terminal mode 2 Be ...

Страница 65: ...acing and Receiving Calls Table 5 1 Changing Default Settings To access the Configuration dialog box the baud rate must be set to Autobaud Parameter Default Value To Change the Default QuickSelect Enabled Send the command ATS71 1 to use Async Sync PPP exclusively or ATS71 2 to use V 120 exclusively DBA Enabled Send the command ATS70 0 to disable DBA Auto Answer Disabled Send the command ATS0 numbe...

Страница 66: ...u can let your communications software send and receive calls for you or you can use a terminal emulator to place calls manually Software that communicates using AT commands is required to control the 3C882 ISDN modem You can enter these codes manually However they are often entered automatically by modem communications software When you place a call the B channel LED s flash green then remain lit...

Страница 67: ...unications software must be in terminal emulation mode Follow these steps to use AT commands In most situations an initialization string is not necessary with the 3C882 ISDN modem If an initialization string is required by the communications software or server use the Hayes default initialization string 1 Launch your communications software Be sure your communications software is in terminal mode ...

Страница 68: ... not including the two AT characters or spaces Placing Multilink PPP Calls Before you place a call ensure that the Multilink PPP box on the 3C882 ISDN modem Configuration dialog box is checked Also the destination you are calling must also support Multilink PPP For example if you are trying to dial into the Internet your Internet service provider must also support Multilink PPP in order to success...

Страница 69: ...string of your application software telephone number 1 telephone number 2 An example is as follows 1 908 555 1212 1 908 555 1213 To manually dial two telephone numbers type the following ATD telephone number 1 telephone number 2 An example is as follows ATD 1 908 555 1212 1 908 555 1213 Placing a 56K TollSaver Call You can place a 56 Kbps data call using a voice channel saving you the additional c...

Страница 70: ...hen a data call comes in a RING message is delivered to the RS 232 port upon reception of an incoming data call to the 3C882 ISDN modem Enter the command AT A to answer the incoming data call A CONNECT message is then delivered to the RS 232 port upon successful connection If Auto Answer is enabled the call is automatically answered and a CONNECT message indicating the speed of the connection is d...

Страница 71: ...shes amber and then remains lit once the call is established Receiving Voice Calls Using an Analog Phone Port By default incoming calls to ISDN telephone number one ring devices connected to both ports simultaneously Calls coming to ISDN telephone number two also ring both devices simultaneously If both ports are busy the third incoming call generates a busy signal to the far end When the 3C882 IS...

Страница 72: ...ing on line help Finding more information Contacting technical support Downloading Firmware There are no user serviceable parts inside your 3C882 ISDN modem Unauthorized opening of the unit will void the warranty Checking the Basics Before you monitor the LEDs or refer to the section on symptoms and solutions check the following Verify that the cables are not physically damaged If damage is appare...

Страница 73: ...D flashes If the LED goes out after the test has been completed the test has been successful If the TEST LED flashes and remains on for more than a few minutes there is an internal failure Notify your reseller that the 3C882 ISDN modem has failed the self test and order a replacement Monitoring the D Channel LED Observe the D channel LED If you are connected to a live digital ISDN line the D chann...

Страница 74: ...any If the telephone wires at your site appear to be satisfactory call your local telephone company for repair of telephone company equipment and troubleshooting assistance D channel continues to flash for more than a few minutes A mismatch between the settings of the ISDN line and the 3C882 ISDN modem configuration Verify the telephone number and SPID if required If the D channel LED continues to...

Страница 75: ...ability mismatch between the local and remote applications Make sure that the local and remote data applications have communications capability and are properly configured Upon power up both the TEST and D channel LEDs flash A previous firmware download did not complete successfully Download the firmware Refer to the Readme file for firmware download instructions Both B1 and B2 flash when the D ch...

Страница 76: ...Web site at http www 3Com com Contacting Technical Support If you have gone through the troubleshooting tips and still have not been able to resolve the problem contact 3Com Technical Support at 800 876 3266 When you call please have the following information available The serial number of your 3C882 ISDN modem A list of symptoms including any LED status information and computer display status The...

Страница 77: ...o order the ISDN service from the telephone company for the 3C882 ISDN modem 1 Call the telephone company and ask for the ISDN representative A list of telephone numbers for major U S telephone companies is provided at the end of this appendix 2 Tell the representative that you want to place an order for ISDN service for a 3ComImpact IQ External ISDN modem and that you have the line provisioning a...

Страница 78: ...time 4 Ask the representative which ISDN switch type your ISDN line will be using Place a check mark in the appropriate box on the supplied ISDN Information Sheet see Figure 1 2 5 Look for the ISDN switch type table in this appendix 6 Provide the information for your specific switch type to the telephone company 7 Ask the ISDN representative to provide the information you need to fill out the ISDN...

Страница 79: ... to receive an incoming call while a dual channel Multilink PPP call is active If you do not want this feature which may cost extra FCO is not required Table A 2 Line Configuration for AT T 5ESS NI1 Required Information Specification Line Type Standard 2B D National ISDN 1 line Line Code 2B1Q Interface Type U interface with an RJ 45 jack Directory Numbers 2 Maximum Terminals 1 Maximum B Channels 2...

Страница 80: ...ive an incoming call while a dual channel Multilink PPP call is active If you do not want this feature which may cost extra FCO is not required Table A 3 Line Configuration for AT T 5ESS Custom Required Information Specification Line Type Standard 2B D ISDN line with point to point configuration Line Code 2B1Q Interface Type U interface with an RJ 45 jack Directory Numbers 2 Maximum Terminals 1 Ma...

Страница 81: ... do not want this feature which may cost extra FCO is not required Table A 4 Line Configuration for DMS 100 Required Information Specification Line Type Standard 2B D National ISDN 1 line Line Code 2B1Q Interface Type U interface with an RJ 45 jack Directory Numbers 2 Circuit switched Option Yes Bearer Restriction Option No packet mode data NOPMD Protocol Functional version 2 PVC 2 SPID Suffix 1 T...

Страница 82: ...e call at a time FCO also referred to as Additional Call Offering allows you to receive an incoming call while a dual channel Multilink PPP call is active If you do not want this feature which may cost extra FCO is not required Table A 5 Line Configuration for Siemens EWSD Required Information Specification Line Type Standard 2B D National ISDN 1 line Line Code 2B1Q Interface Type U interface with...

Страница 83: ...improve data transfer times using the Stac compression method The following check modes are negotiable None One Byte Sequence Number and Extended Extended is the preferred choice C0 disables compression C2 enables compression C Serial port CD control AT C2 C0 forces CD to remain on at all times C1 forces CD to follow the state of carrier from the remote system CD turns on after CONNECT message is ...

Страница 84: ... checksum I2 computes and compares the flash memory checksum to a prestored value I3 displays the product name and release number O Enter connect state AT O Causes the ISDN modem to go out of command mode into on line mode Q Result code control AT Q0 Q0 enables the output of result codes default Q1 disables the output of result codes Q2 disables the output of result codes in answer mode only Q Ser...

Страница 85: ...t W Displays connection speed W0 displays COM port rate only default W1 displays COM port and ISDN data rate W2 displays ISDN data rate only W Stores configuration AT W Stores the configuration of all S registers that are not part of the ISDN modem initial configuration set Z Reset AT Z Disconnects all calls in progress and performs a complete ISDN modem system reset Enter command state Causes ISD...

Страница 86: ...e auto answer S50 ISDN Switch Signaling Type 0 Unknown default 1 AT T 5ESS Custom 3 NI1 AT T 5ESS 6 NI1 NTI DMS 100 or Siemens EWSD S51 Phone 1 S52 Phone 1 Service Profile ID SPID S53 Phone 2 if required by your carrier S54 Phone 2 Service Profile ID SPID if required by your carrier S55 Terminal Endpoint Identifier 1 Stores the first TEI assigned by the switch A value of 255 indicates no TEI has b...

Страница 87: ...ided only if your carrier requires a second directory number This field is read only 0 ISDN modem has not attempted initialization 1 ISDN modem has initialized successfully using SPID 2 2 ISDN modem has failed initialization using SPID 2 S59 U Interface Status This field is read only 0 ISDN U interface is not synchronized with the switch 1 ISDN U interface is synchronized and ready S60 B Channel D...

Страница 88: ... only 11 Phone 1 to Phone port 1 or 2 Phone 2 to Phone port 2 only 12 Phone 1 calls blocked Phone 2 to Phone port 1 or 2 13 Phone 1 to Phone port 1 only Phone 2 to Phone port 1 or 2 14 Phone 1 to Phone port 2 only Phone 2 to Phone port 1 or 2 15 Phone 1 to Phone port 1 or 2 Phone 2 to Phone port 1 or 2 default S65 ISDN Caller ID for Voice Calls for Phone Port 1 Displays the phone number of an inco...

Страница 89: ...ou are using Windows NT use the two second delay 0 No delay default 1 Two second delay S80 Multilink PPP 0 Disable 1 Enable default S82 Multilink PPP Endpoint Identifier Class 1 Locally Assigned Address 2 Internet Protocol IP Address 3 IEEE 802 1 Globally Assigned MAC Address 4 PPP Magic Number Block 5 Public Switched Network Directory Number default S83 Multilink PPP Endpoint Identifier up to 20 ...

Страница 90: ...ocation you are calling is not responding 5 CONNECT 1200 Indicates 1200 bps serial port connection 10 CONNECT 2400 Indicates 2400 bps serial port connection 11 CONNECT 4800 Indicates 4800 bps serial port connection 12 CONNECT 9600 Indicates 9600 bps serial port connection 13 CONNECT 7200 Indicates 7200 bps serial port connection 14 CONNECT 12000 Indicates 12000 bps serial port connection 15 CONNEC...

Страница 91: ...N Basic Rate telephone service provided by the telephone company Physical Interface U integrated NT1 Physical Dimensions Length 8 66 in 22 0 cm Width 5 44 in 13 8 cm Height 1 56 in 4 0 cm Environmental Operating Range Operating temperature 50 to 122 F 10 to 50 C Relative humidity Up to 90 noncondensing Power Input 110 120 VAC Output 9 VDC Ringer Equivalence Number REN 3 per analog phone port on up...

Страница 92: ...s for data communications equipment DCE Table C 1 Pin Descriptions Pin Pin Name Signal Direction 1 Shield Ground GND 2 Send Data SD To ISDN modem 3 Receive Data RD From ISDN modem 4 Request to Send RTS To ISDN modem 5 Clear to Send CTS From ISDN modem 6 Data Set Ready DSR From ISDN modem 7 Signal Ground GND 8 Carrier Detect DCD From ISDN modem 18 Local Loopback From ISDN modem 20 Data Terminal Rea...

Страница 93: ... 3 Table C 2 PC COM Port Cable Pin Assignments DB9 Pin Pin Name DB25 Pin 1 Data Carrier Detect DCD 8 2 Receive Data RD 3 3 Send Data SD 2 4 Data Terminal Ready DTR 20 5 Signal Ground GND 7 6 Data Set Ready DSR 6 7 Request to Send RTS 4 8 Clear to Send CTS 5 9 Ring Indicator RI 22 Shield 1 Table C 3 Macintosh COM Port Cable Pin Assignments 8 Pin DIN Pin Pin Name DB25 Pin 1 Data Terminal Ready DTR 2...

Страница 94: ...tilities diskette into the floppy drive of the PC Create a new DOS directory For example to create a directory named 3Com on your C drive at the C DOS prompt type md c 3Com 2 Copy the INSTALL EXE and README TXT files from the 3ComImpact Windows DOS Installation Diagnostic Utilities diskette to the hard drive To copy the INSTALL EXE file at the C 3Com prompt type copy a install exe To copy the READ...

Страница 95: ...enter the telephone number to which your ISDN modem is connected 8 Enter the corresponding Service Profile Identifier SPID in the SPID 1 field for the telephone number you entered in the previous step You should have received this SPID from your telephone company 9 If you have a second telephone number associated with your ISDN telephone line some telephone companies require two enter the number a...

Страница 96: ...ly ring the analog device attached to Phone Port 1 12 If your ISDN line has two telephone numbers specify which Phone port should handle the calls associated with telephone number two 13 Confirm that the parameters listed in steps 6 through 12 are correct When these parameters are updated the information is read back to the screen Check to see that the values have been correctly entered 14 Press F...

Страница 97: ...following on line systems 3Com Bulletin Board Service 3ComBBS World Wide Web site 3ComForum on CompuServe 3ComFactsSM automated fax service 3Com Bulletin Board Service 3ComBBS contains patches software and drivers for all 3Com products as well as technical articles This service is available via modem or ISDN seven days a week 24 hours a day Access by Analog Modem To reach the service by modem set ...

Страница 98: ...s news and information about 3Com products customer service and support 3Com s latest news releases selected articles from 3TECH 3Com s award winning technical journal and more Country Data Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 France up to 14400 bps 33 1 69 86 69 54 Germany up to 9600 bps 49 89 627 32 188 or 49 89 627 32 189 Hong Kong up to 14400 bps 852 2537 5608 Italy f...

Страница 99: ...acts provides data sheets technical articles diagrams and troubleshooting instructions on 3Com products 24 hours a day seven days a week Call 3ComFacts using your analog touch tone telephone International access numbers are Local analog numbers are Country Telephone Number Hong Kong 852 2537 5610 U K 44 1442 278279 U S 1 408 727 7021 Country Telephone Number Country Telephone Number Australia 800 ...

Страница 100: ...n levels Details about recent configuration changes if applicable If you are unable to contact your network supplier see the following section on how to contact 3Com Support from 3Com If you are unable to receive support from your network supplier technical support contracts are available from 3Com In the U S and Canada call 800 876 3266 for customer service Returning Products for Repair A product...

Страница 101: ...tobaud automatically detects the baud rate of your computer s serial port B channel Bearer channel In ISDN communications a B channel transmits data and voice traffic at a rate of up to 64 Kbps BRI Basic Rate Interface A BRI line is one of two access methods to the ISDN Each BRI consists of two 64 Kbps B channels and one 16 Kbps D channel for each ISDN line CHAP Challenge Handshake Authentication ...

Страница 102: ...owing check modes are negotiable None One Byte Sequence Number and Extended Extended is the preferred choice The degree of compression depends on the type of file being transferred For example a text only file compresses better than a file with graphics D channel The signaling channel on an ISDN line used to carry messages between the 3C882 ISDN modem and the public switch DBA Dynamic bandwidth al...

Страница 103: ...between the communication equipment If layer one is down there is no ISDN connection between the devices The status bar in the 3C882 ISDN modem Configuration screen indicates layer 1 status Multilink PPP Multilink PPP is a protocol which provides a method for combining multiple PPP connections With a BRI line Multilink PPP aggregates the two 56 Kbps or 64 Kbps I SDN B channels creating a virtual s...

Страница 104: ...Rate Interface A PRI line is one of two access methods to the ISDN In North America each PRI consists of twenty three 64 Kbps B channels and one 64 Kbps D channel QuickSelect A built in feature that automatically detects and uses the protocol required for each digital call V 120 or Async Sync PPP SPID Service Profile Identifier If required this number is supplied to you by the telephone company Ty...

Страница 105: ... 6 5 voice placing 6 6 receiving 6 6 call routing analog ports for Macintosh 4 12 analog ports for PC using DOS D 3 analog ports for PC using Windows 3 11 Challenge Handshake Authentication Protocol CHAP 1 4 COM port connection 2 5 pinout specifications C 2 compression 5 3 CompuServe E 3 configuration for an Apple Macintosh computer 4 2 using DOS D 1 using Windows 3 1 using Windows 95 3 13 using W...

Страница 106: ...work interface C 1 network supplier support E 4 Northern Telecom DMS 100 switch A 5 NT1 1 3 2 5 O on line help 7 5 on line technical services E 1 ordering ISDN service for AT T 5ESS Custom A 4 for AT T 5ESS NI1 A 3 for Northern Telecom DMS 100 A 5 for Siemens EWSD A 6 P package contents 1 5 Password Authentication Protocol PAP 1 4 PC requirements 1 6 Phone port 2 6 3 9 4 10 physical dimensions C 1...

Страница 107: ...1 switch type A 3 to A 6 T technical support E 1 Test LED 7 2 7 3 troubleshooting 7 1 checking the basics 7 1 evaluating symptoms and solutions 7 3 monitoring LEDs 7 2 V V 120 protocol 1 2 voice calls placing 6 6 receiving 6 6 W warranty 1 4 Windows 95 Plug and Play setup 3 13 Windows NT 3 17 World Wide Web site E 2 ...

Страница 108: ...rovided 3Com s sole obligation with respect to this express warranty shall be at 3Com s discretion to refund the purchase price paid by Customer for any defective software products or to replace any defective media with software which substantially conforms to 3Com s applicable published specifications Customer assumes responsibility for the selection of the appropriate applications program and as...

Страница 109: ...ILITY TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAI...

Страница 110: ...ll as the supporting documentation to the same party or destroy any such materials not transferred Except as set forth above you may not assign your rights under this License Agreement Modification reverse engineering reverse compiling or disassembly of the Software is expressly prohibited However if you are a European Community EC resident information necessary to achieve interoperability of the ...

Страница 111: ...d to agreements entered into and to be performed entirely within California between California residents and by the laws of the United States You agree that the United Nations Convention on Contracts for the International Sale of Goods 1980 is hereby excluded LIMITED WARRANTY LIMITATION OF LIABILITY All warranties and limitations of liability applicable to the Software are as stated on the Limited...

Страница 112: ...hat interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and rece...

Страница 113: ...e customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user...

Страница 114: ... 1996 3Com Corporation ...

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