Page 3 - ONTENTS
C ONTENTS A BOUT T HIS G UIDE Introduction iHow to Use This Guide iConventions ii 1 I NTRODUCTION 3Com Impact Digital Modem Features 1-3 Data Capabilities 1-4Voice Capabilities 1-4Simultaneous Data and Voice Capabilities 1-4Analog Modem Capabilities 1-5 3Com Impact Digital Modem Package Contents 1-5...
Page 4 - AT C; AT Command Set for the 3Com Impact; FCC C
Using the Phone Out Port 2-17 Placing Calls Using the Phone Out Port 2-18Receiving Calls Using the Phone Out Port 2-18 Protocol Support 2-19 Async-Sync PPP Conversion 2-19QuickSelect 2-19 3 T ROUBLESHOOTING Troubleshooting Tips 3-1Downloading Firmware to Your External Digital Modem 3-5 A AT C OMMAND...
Page 5 - IGURES; Back Panel Power Switch and Connectors 2-1
F IGURES 1-1 Analog and Digital Network Access with the3Com Impact Digital Modem 1-2 2-1 Back Panel Power Switch and Connectors 2-1 2-2 Front Panel LED Indicators 2-1 2-3 Configuration Dialog Box 2-8
Page 6 - ABLES
T ABLES 1 Text Conventions ii 2 Notice Icons ii 1-1 ISDN Ordering Information by Switch Type 1-7 1-2 Pin Descriptions 1-9 2-1 Front Panel LED Indicator Definitions 2-2 B-1 AT Command Set Summary B-1 B-2 AT Command Set Summary for the Internal Analog Modem B-4 B-3 Remote S Registers B-7 B-4 3Com Impa...
Page 7 - Introduction; Impact; How to Use This Guide; If you are looking for:
A BOUT T HIS G UIDE Introduction This guide describes how to install, operate, and troubleshoot the 3Com â Impact ä ISDN External Digital Modem, referred to throughout this guide as the 3Com Impact digital modem. If the information in the release notes shipped with your product differs from the info...
Page 8 - Conventions; Table 1; Convention; commands; Table 2; Icon
ii A BOUT T HIS G UIDE Conventions Table 1 and Table 2 list text and icon conventions that are used throughout this guide: Table 1 Text Conventions Convention Description Text represented as screen display This typeface is used to represent displays that appear on your terminal screen, for example: ...
Page 9 - NTRODUCTION; earer) channels for user data, and one 16 Kbps signaling
1 I NTRODUCTION The Integrated Services Digital Network (ISDN) is a digital communications standard for supporting voice, data, and video applications through conventional telephone wires. Specifically, ISDN is a method of connecting to the public telephone network using digital technology. ISDN use...
Page 10 - or IBM-compatible PC external digital
1-2 C HAPTER 1: I NTRODUCTION The 3Com Impact ISDN External Digital Modem (referred to as the 3Com Impact digital modem throughout this guide) is an external, stand-alone ISDN Basic Rate digital modem for connection with digital telephone services from local telephone companies in North America. It ...
Page 11 - Com Impact Digital Modem Features; bis
3Com Impact Digital Modem Features 1-3 The 3Com Impact digital modem can be connected to any compatible UL â -listed IBM AT â -compatible or Apple Macintosh personal computer that includes instructions for the installation of hardware and software options to serial ports. 3Com Impact Digital Modem F...
Page 12 - Data Capabilities; This high-speed performance allows you to do the following:; Voice Capabilities
1-4 C HAPTER 1: I NTRODUCTION Data Capabilities The 3Com Impact digital modem allows transmission of asynchronous data at speeds of up to 115.2 Kbps over digital ISDN connections with the highest reliability and error-free performance possible. With Multilink PPP, a digital connection of up to 128 K...
Page 13 - Analog Modem Capabilities; Com Impact Digital Modem Package Contents; Standard Package Contents; Com Impact ISDN External Digital Modem User Guide; Additional Contents
3Com Impact Digital Modem Package Contents 1-5 Analog Modem Capabilities The 3Com Impact digital modem (models 3C872 and 3C877) includes an integrated V.32 bis analog modem for data or fax transmissions of up to 14.4 Kbps over the ISDN line. V.42 bis data compression boosts analog modem throughput t...
Page 14 - ISDN Digital Line Configuration Requirements
1-6 C HAPTER 1: I NTRODUCTION Model 3C872 ■ One copy of TurboCom Windows software ■ One copy of Delrina â WinComm ä Lite and WinFax â Lite communications software ■ One DB-9-to-DB-25 serial connection adapter ISDN Digital Line Configuration Requirements The 3Com Impact digital modem requires an ISDN...
Page 15 - Computer System Requirements; ISDN Switch Type
Computer System Requirements 1-7 Computer System Requirements * Two directory numbers are required for Models 3C872 and 3C877. This allows a voice call and a call using the internal analog fax modem to occur at the same time. Connect the model 3C871 or 3C872 3Com Impact digital modem to an IBM-compa...
Page 16 - IBM PC or Compatible Requirements; driver for; Apple Macintosh Requirements; ) have data rates of up to
1-8 C HAPTER 1: I NTRODUCTION IBM PC or Compatible Requirements An IBM-compatible PC must have the following: ■ A 386, 486, or Pentium â processor ■ An available serial communications port For sustained performance at higher data rates (57.6 Kbps and 115.2 Kbps), it is recommended that your IBM or I...
Page 17 - Cabling Requirements; Pin Name
Cabling Requirements 1-9 Cabling Requirements Cables to connect the 3Com Impact digital modem to your computer are provided. For IBM or IBM-compatible PCs with a 25-pin serial port, a DB-9–to–DB-25 connection adapter is included with the digital modem. The asynchronous RS-232-C port on the digital m...
Page 19 - LED
2-2 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM Table 2-1 Front Panel LED Indicator Definitions LED Color Description Power Yellow Power Indicator. Lit when power is on and remains lit as long as power is available from the ac wall transformer plugged into the electrical outlet. Tes...
Page 20 - Installing the 3Com Impact Digital Modem; Installing the Digital Modem in an IBM-compatible PC; Turn off the computer.
Installing the 3Com Impact Digital Modem 2-3 Installing the 3Com Impact Digital Modem This installation procedure assumes that you are familiar with IBM and IBM-compatible or Apple Macintosh computers. If you are not, refer to the user guide that accompanied your computer for instructions on hardwar...
Page 21 - The 3Com Impact digital modem is designed; Turn on the computer’s power switch.
2-4 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM 7 Connect the RJ-45 (8-pin) connector end of the RJ-45/RJ-11 ISDN cable to the RJ-45 connector labeled Wall on the digital modem’s back panel. See Figure 2-1 for the location of the RJ-45 connector on the digital modem’s back panel. 8 ...
Page 23 - Turn on the computer’s power switch and restart.; Configuring the 3Com Impact Digital Modem
2-6 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM 9 Turn on the 3Com Impact digital modem by toggling the power switch on the back panel to the On position. See Figure 2-1 for the location of the power switch on the digital modem’s back panel. The indicator LEDs on the front panel (se...
Page 24 - Configuration for IBM PC or Compatible Computer; –based installation program.; Configuration Using Windows; COM1 is the default COM port.
Configuring the 3Com Impact Digital Modem 2-7 After you configure the digital modem and verify that it is working properly, you should install the TurboCom software. Refer to the installation instructions that came with the TurboCom software. This software is required only forIBM PC or compatible co...
Page 25 - Layer 1 status
2-8 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM Click Connect. The 3Com Impact Configuration dialog box appears, as shown in Figure 2-3. Figure 2-3 Configuration Dialog Box A status bar below the Help, Tools, Configure, and Exit buttons provides the following ISDN status information...
Page 26 - If the ISDN line has been configured with only one
Configuring the 3Com Impact Digital Modem 2-9 5 Select the type of switch, as specified by your telephone company, from the Telephone Company Switch drop-down list box. 6 Click in the Telephone Number field in the Number 1 area and enter the telephone number to which your digital modem is connected....
Page 27 - Configuration Using DOS
2-10 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM 12 If you have changed the Telephone Company Switch type, you must reset the digital modem by turning the power switch off and then on. 13 Verify the configuration. Check the status bar (located beneath the Help, Tools, Configure, and...
Page 28 - Execute INSTALL from the hard drive.; INSTALL; The Configuration screen will appear.
Configuring the 3Com Impact Digital Modem 2-11 Copy the files to a new DOS directory. For example, to create a directory dddd on your C drive at the C:\> DOS prompt, type: md c:\dddd To copy all files from the diskette to a directory \dddd at the A:\> DOS prompt, type: copy a:*.* c:\dddd 2 Exe...
Page 30 - Configuration for Apple Macintosh Computer
Configuring the 3Com Impact Digital Modem 2-13 12 Reset the digital modem by turning the power switch off and then on again. If the parameters match those registered at the telephone company ISDN switch, the D channel LED lights for a few minutes, flashes for several seconds, and then turns off. If ...
Page 32 - Placing and Receiving Calls; Placing ISDN Data Calls; ATD; to dial a digital ISDN data call. Depending on; Multilink PPP Calls With Dynamic Bandwidth Allocation
Placing and Receiving Calls 2-15 Placing and Receiving Calls This section illustrates how to place and receive a variety of calls with your 3Com Impact digital modem. The digital modem uses AT commands and S registers for call management. See Appendix A, “AT Command Set Overview,” for instructions o...
Page 33 - to the digital modem.
2-16 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM By default, the 3Com Impact digital modem dials the same number for both Multilink PPP channels. If the destination to which the digital modem is dialing to establish a second Multilink PPP channel requires a different telephone numbe...
Page 34 - Placing Analog Modem Calls; Using Communications Software to Place Calls; Using the Phone Out Port
Using the Phone Out Port 2-17 Placing Analog Modem Calls To place a call from your PC or Macintosh using the optional V.32 bis 14.4 Kbps internal analog fax modem (included with models 3C872 and 3C877), use the AT command ATDT (for connection to an analog modem using touch-tone dialing) or ATDP (for...
Page 35 - The 3Com Impact digital modem is designed to; Placing Calls Using the Phone Out Port
2-18 C HAPTER 2: I NSTALLING AND C ONFIGURING THE D IGITAL M ODEM CAUTION: The 3Com Impact digital modem is designed to operate with telephones that are compatible with the original AT&T 2500 touch-tone telephone standard. 3Com guarantees proper operation of up to three compatible touch-tone dev...
Page 36 - Protocol Support; Async-Sync PPP Conversion; so that you do not have to
Protocol Support 2-19 Protocol Support Async-Sync PPP Conversion One of the most unique and powerful features of the3Com Impact digital modem is its ability to convert asynchronous Point-to-Point Protocol (PPP) into synchronous (HDLC-based) PPP that can be transported in ISDNB channels to communicat...
Page 37 - ROUBLESHOOTING; Troubleshooting Tips; The power supply is connected and the power LED is on.
3 T ROUBLESHOOTING This chapter explains how to isolate and solve simple problems encountered with the 3Com Impact digital modem. Problems may stem from incorrect option settings or improper installation. Follow the steps outlined in this chapter. There are no user-serviceable parts inside your 3Com...
Page 38 - Monitor the status of the D channel LED.
3-2 C HAPTER 3: T ROUBLESHOOTING The 3Com Impact digital modem will not operate if connected to an analog telephone wall jack. Make sure that the digital modem is connected directly into the ISDN wall outlet without connection to any intermediate telephone equipment (an NT1 device is not required wi...
Page 41 - If problems persist, refer to Appendix C, “Technical Support.”; For IBM and IBM-Compatible PCs; Obtain the latest firmware file from the 3Com FTP site
Downloading Firmware to Your External Digital Modem 3-5 8 If problems persist, refer to Appendix C, “Technical Support.” If you have gone through the troubleshooting tips and still have not been able to resolve the problem, contact technical support. Please have the serial number of your 3Com Impact...
Page 42 - The download will take several minutes.; For Macintosh Computers; Copy the firmware file to your computer.
3-6 C HAPTER 3: T ROUBLESHOOTING 6 Select the firmware file that you copied from 3Com’sFTP site and click OK to start the download to the3Com Impact digital modem. The download will take several minutes. 7 Click the Exit button to exit the utility. For Macintosh Computers This section provides instr...
Page 43 - OMMAND; AT
A AT C OMMAND S ET O VERVIEW Most communications software supports an AT command line initialization string. The initialization string sets up the 3Com Impact digital modem to negotiate and connectwith a remote modem. Before dialing, the software sendsthe initialization string to the 3Com Impact dig...
Page 44 - Follow these steps to use AT commands:
A-2 A PPENDIX A: AT C OMMAND S ET O VERVIEW Follow these steps to use AT commands: 1 Launch your communications software. Be sure your communications software is in terminal mode. 2 Be sure the digital modem is in command mode (sometimes called local mode or terminal mode) so that it interprets your...
Page 45 - OMMANDS; Description
B AT C OMMANDS , R EGISTERS , AND R ESULT C ODES The 3Com Impact ISDN digital modem commands are summarized in Table B-1, modem commands for the internal analog modem in Table B-1, remote S registers in Table B-3, and digital modem result codes in Table B-4. AT Command Set for the 3Com ImpactDigital...
Page 48 - AT Command Set for Internal Analog Fax Modem
B-4 A PPENDIX B: AT C OMMANDS , R EGISTERS , AND R ESULT C ODES AT Command Set for Internal Analog Fax Modem Table B-1 summarizes the AT command set for the internal analog modem. Table B-2 AT Command Set Summary for the Internal Analog Modem Command Function (Example) Description B Set 1200 bps (op...
Page 51 - Remote S Registers; Registers
Remote S Registers B-7 Remote S Registers The 3Com Impact digital modem supports the S registers listed in Table B-3. All S registers except S0 are the 3Com extended registers. Table B-3 Remote S Registers Registers Descriptions S0 Auto Answer 0 — Disabled (default) 1 — Enabled S50 ISDN Switch Signa...
Page 54 - Digital Modem Result Codes; Table B-4 lists the 3Com Impact digital modem result codes.; Short Form
B-10 A PPENDIX B: AT C OMMANDS , R EGISTERS , AND R ESULT C ODES Digital Modem Result Codes Table B-4 lists the 3Com Impact digital modem result codes. Table B-4 3Com Impact Digital Modem Result Codes Short Form Long Form Meaning 0 OK Indicates that the most recent command or action was successfully...
Page 55 - On-line Technical Services; Com Bulletin Board Service; Country
C T ECHNICAL S UPPORT 3Com provides easy access to technical support information through the variety of services described in this appendix. On-line Technical Services 3Com offers worldwide support, through the following: ■ 3Com Bulletin Board Service (3ComBBS) ■ World Wide Web Site ■ Ask3Com SM on ...
Page 56 - World Wide Web Site; Log on to CompuServe.; go threecom; ComFacts Automated Fax Service; for adapter information, or NetFacts; CardFacts; provides adapter installation diagrams,
C-2 A PPENDIX C: T ECHNICAL S UPPORT World Wide Web Site Access the latest networking information on 3Com’s World Wide Web site by entering our URL into your Internet browser: http://www.3Com.com/ This service features news and information about 3Com products, customer service and support, 3Com’s la...
Page 57 - NetFacts; provides data sheets and technical articles on; Support from Your Network Supplier; Diagnostic error messages
Support from Your Network Supplier C-3 ■ NetFacts provides data sheets and technical articles on 3Com Corporation’s hub, bridge, router, terminal server, and software products. Document 8888 provides you with an index of system product documents. Call 3ComFacts using your touch-tone telephone. Inter...
Page 58 - Support from 3Com; for customer service.; Returning Products for Repair
C-4 A PPENDIX C: T ECHNICAL S UPPORT 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 sent directly to 3Com...
