3Com 3C871 Programming manual

®
3C OM I MPACT
ISDN E
XTERNAL
D
IGITAL
M ODEM Q UICK S TART
I
NSTRUCTIONS
Part Number 09-0700-002
The following information will help you install the 3Com

Impact

ISDN External digital modem models 3C871,3C872,
3C876,or 3C877.Refer to the
3Com Impact ISDN External
Digital Modem User Guide
for additional information.
Site Preparation
The Basic Rate ISDN line and computer serial port must be
properly configured.
Ordering,Installing, and Configuring the ISDN Line
3Com has determined the optimal ISDN line configurations
for the 3Com Impact digital modem and has provided that
configuration data to many telephone companies.To simplify
the ordering process for an ISDN digital line,use the following
simplified ISDN ordering code:
3ComA * J6
If your digital modem has an internal analog fax modem
(Models 3C872 and 3C877),then two directory numbers
(telephone numbers) will be required to allow a voice call and
a fax modem call to occur at the same time.When you tell the
telephone company the ISDN ordering code (3ComA * J6) let
the representative know that you will need two directory
numbers.
If your telephone company does not support simplified ISDN
ordering codes,refer to Table 1 for ISDN ordering information.
An internal NetworkTermination Type 1 device (NT1) is built
into the 3Com Impact digital modem,so an external NT1 is
not usable.When the telephone company installs the ISDN
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line at your location,be sure it provides you with the
following information.For future reference,write the
information in the blank spaces.
Table 1 ISDN Ordering Information by SwitchType
* 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.
ISDN Switch Type: (See Table1) ___________________
Phone #1: (Local ISDN Directory Number 1) ___________________
SPID #1: (Service Profile Identifier Number 1) ___________________
Phone #2: (Local ISDN Directory Number 2) ___________________
SPID #2: (Service Profile Identifier Number 2) ___________________
ISDN Switch Type
ISDN Line
Configuration
Parameter AT&T

5ESS
Custom
AT&T 5ESS
National
ISDN-1
Northern
Telecom

DMS100
National
ISDN-1
Siemens

EWSD
National
ISDN-1
Line Code 2B1Q (no NT1
required) 2B1Q (no NT1 required) 2B1Q (no NT1 required) 2B1Q (no NT1 required)
Directory
Numbers 1
*
1
*
21
*
Channels 2B alternate
circuit-switched
data and voice
2B alternate
circuit-switched
data and voice
2B alternate
circuit-switched
data and voice
2B alternate
circuit-switched
data and voice
Terminal Type A with
Point-to-Point A with Point-to-Point Functional PVC 2 Functional
TEI Dynamic Dynamic Dynamic Dynamic
Call
Appearances Idle Idle — —
Supplemental
Voice Features None None None None
EKTS Features No No No No
D Channel
Packet No No No No
B Channel
Packet No No No No
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Installing the 3Com Impact Digital Modem 3
The 3Com Impact digital modem has an RS-232-C
asynchronous interface port that operates at data rates of up
to 115.2 Kbps.Some computers may need additional
hardware or driver software for reliable operation.
IBM PCs and Compatible Computers
An IBM

PC or compatible computer must have a buffered
UART (universal asynchronous receiver/transmitter) chip,called
the 16550 UART,to operate at 115 Kbps.Under Microsoft

Windows

,run the Microsoft Diagnostic Program ( msd ) at the
DOS prompt and select COM Ports within msd.The UARTs
present in your computer are listed under each COM port.
To operate at the maximum data rate,install an enhanced
16550 UART expansion card in your PC.If you have a
nonupgradable PC with a slower UART (16450 or 8250),the
3Com Impact digital modem can operate at lower data rates,
since it automatically adjusts to the PC serial COM port data
rate.The COMM.DRV driver for Windows 3.1 only allows data
rates of up to 38.4 Kbps.If you have a UART that supports
higher rates than this (for example,16550),you must install the
TurboCom

enhanced driver that is provided with the digital
modem.
Apple Macintosh Computers
Motorola

68XXX-based Macintosh

systems support a
maximum asynchronous serial port data rate of 57.6 Kbps.
Power Macintosh

computers may operate at higher serial
port data rates.
Installing the 3Com Impact Digital Modem
Follow the appropriate procedure for installing the
3Com Impact digital modem in your computer.Refer to
Figure1 during the installation procedure.
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Figure 1 3Com Impact Digital Modem Rear Panel
Installing the Digital Modem in an IBM-compatible PC
To install the 3Com Impact digital modem in an IBM or
compatible PC,follow these steps:
1 Turn off the computer.
2 Insert the 9-pin male end of the 3Com Impact digital
modem-to-PC serial signal cable into the connector labeled
Computer on the digital modem’s back panel and tighten the
connector screws.
3 Connect the other end of the 3Com Impact digital
modem-to-PC serial signal cable to a serial communications
(COM) port on the back of your PC and tighten the connector
screws.
4 Connect the 3Com Impact digital modem power cable to the
connector marked 12V AC on the back panel of the digital
modem.
5 Plug the transformer end of the power cable into a standard
117V ac wall outlet.
6 Connect the RJ-45 (8-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-45 connector labeledWall on the
digital modem’s back panel.
7 Connect the RJ-11 (6-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-11 telephone ISDN jack.
Power 12V AC RS232D Wall
ISDN BRI-U ONLY
RS232D
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Installing the 3Com Impact Digital Modem 5
CAUTION: The 3Com Impact digital modem is designed to
operate with Basic Rate ISDN 2B1Q U Interface network
terminations.AninternalNetworkTerminationdevice(NT1)is
built into the digital modem.Do not connect the 3Com
Impact digital modem ISDN port to a standard analog
telephone jack or to an external NT1 device.Make sure that it
is connected to the ISDN jack.
8 Turn on the 3Com Impact digital modem by toggling the
power switch on the back panel to the On position.
9 Turn on the computer’s power switch.
10 Go to the section “Configuration for IBM PC or Compatible
Computer” to configure the 3Com Impact digital modem for
your computer.
Installing the Digital Modem in an Apple Macintosh
Computer
To install the 3Com Impact digital modem in an Apple
Macintosh computer,follow these steps:
1 Turn off the computer.
2 Insert the 9-pin male end of the 3Com Impact digital
modem-to-Macintosh serial signal cable into the
connector labeled Computer on the digital modem’s back
panel and tighten the connector screws.
3 Connect the other end of the 3Com Impact digital
modem-to-Macintosh serial signal cable to the serial
communications port on the back of the Macintosh.
The serial communications port is the mini-DIN,8-pin serial
port connector,indicated on the Macintosh connector panel
by the telephone handset imprint.
4 Connect the 3Com Impact digital modem power cable to
the connector marked 12V AC on the back panel of the
digital modem.
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5 Plug the transformer end of the power cable into a
standard 117V ac wall outlet.
6 Connect the RJ-45 (8-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-45 connector labeledWall on the
digital modem’s back panel.
7 Connect the RJ-11 (6-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-11 telephone ISDN jack.
CAUTION: The 3Com Impact digital modem is designed to
operate with Basic Rate ISDN 2B1Q U Interface network
terminations.An internal NetworkTermination device (NT1)
is built into the digital modem.Do not connect the 3Com
Impact digital modem ISDN port to a standard analog
telephonejackortoanexternal NT1 device.Makesurethatit
is connected to the ISDN jack.
8 Turn on the 3Com Impact digital modem by toggling the
power switch on the back panel to the On position.
9 Turn on the computer’s power switch and restart.
10 Go to the section “Configuration for Apple Macintosh
Computer” to configure the 3Com Impact digital modem for
your computer.
Configuring the 3Com Impact Digital Modem
The 3Com Impact digital modem requires the five essential
configuration parameters below before it can operate
properly on an ISDN line.Before configuring the digital
modem,make sure you have this information readily
available.These five parameters are provided to you at the
time of installation of your ISDN line by the telephone
company installer.
■
ISDN Switch Type
■
Phone #1 (local directory telephone number)
■
SPID #1 (Service Profile Identifier)
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Configuring the 3Com Impact Digital Modem 7
■
Phone #2 (if required by the telephone company)
■
SPID #2 (if required by the telephone company)
Each of these items is stored in special S registers within the
digital modem.These S registers are set by issuing ATSxx=
commands to the digital modem.The 3Com Impact digital
modem software will automatically issue the AT commands
to set the S registers as part of the configuration process.
The following three sections describe how to configure the
3Com Impact digital modem using the Windows,DOS,or
Macintosh operating systems,respectively.
After you configure the digital modem and verify that it is
working properly,you should install theTurboCom software.
Refer to the installation instructions that came with the
TurboCom software.This software is required only for
IBM PC or compatible computers runningWindows 3.X.
Configuration for IBM PC or Compatible Computer
You can configure the 3Com Impact digital modem for
an IBM PC or compatible using either theWindows-based
installation program or the MS-DOS

–based installation program.
Configuration Using Windows
To configure the digital modem for an IBM PC or compatible
computer using Windows:
1 Insert the 3Com Impact DOS & Windows Installation
Diagnostic Utilities diskette into an available diskette drive.
2 Select Run from the File menu.In the Run dialog box,type:
a:setup
The check box labeled Run Minimized should be left
unchecked.
3 Click OK.
The installation process begins copying the configuration
program to the hard disk.A message box provides the status
of the installation and indicates when it is complete.
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4 Double-click the 3Com Impact icon to access the 3Com
Impact Configuration dialog box.
COM1 is the default COM port.
■
If the digital modem is connected to COM1,the 3Com
Impact Configuration dialog box appears,as shown in
Figure2.Go on to step 5.
■
If the digital modem is not connected to COM1,the
COM Port Provisioning dialog box appears.Choose the
COM port to which the digital modem is connected.Click
Connect.The 3Com Impact Configuration dialog box
appears,as shown in Figure 2.
Figure 2 Configuration Dialog Box
A status bar below the Help,Tools,Configure,and Exit
buttons provides the following ISDN status information:
■
Layer 1 status
■
Service Profile Identifier (SPID) for telephone numbers 1 and 2
■
Terminal Endpoint Identifiers (TEI) 1 and 2 (for information
purposes only)
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Configuring the 3Com Impact Digital Modem 9
A message bar at the bottom of the dialog box provides help
for completing the fields.If you click in a field,the message
bar tells you what information to enter in the field.The
message bar also provides status information about the
digital modem.If the digital modem is disconnected from
the ISDN telephone line,for example,a message indicates
this condition.
The right side of the dialog box shows the digital modem
software version,along with any installed options (such as
Multilink PPP or internal analog fax modem).
5Select the type of switch,as specified by your telephone
company,from the Telephone Company Switch
drop-down list box.
6Click in the Telephone Number field in the Number 1 area
and enter the telephone number to which your digital
modem is connected.
7Click in the Service Profile Identifier (SPID) field and enter
the corresponding SPID for the telephone number you
entered in the previous step.
You should have received this SPID from your telephone
company.
CAUTION:If the ISDN line has been configured with only one
telephone number (Point-to-Point),do not include the SPID.
8Specify which device should receive the calls coming to
Telephone Number 1.
You can select Phone Port or Internal Fax/Modem.If your
model has the internal analog fax modem installed
(Models 3C872 and 3C877),you can select both.
If both boxes are checked,the internal analog fax modem and
the phone will both ring,enabling you to answer using either
device.
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10 3COM IMPACT ISDN EXTERNAL DIGITAL MODEM QUICK START INSTRUCTIONS
9If you have a second telephone number associated with
your ISDN telephone line (some telephone companies
require two),enter the number and corresponding SPID in
the appropriate fields in the Number 2 area.
10 Specify which device should receive the calls coming to
Telephone Number 2.
11 Click the Configure button to download the parameters
listed in steps 5 through 10 to your digital modem’s
S registers.
12 If you have changed theTelephone 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 Exit buttons of the Configuration dialog box)
to verify correct configuration.If the parameters were
configured accurately and the digital modem is ready to
send and receive calls,the status bar fields will appear as
shown below.Note that theTEI number(s) are not configured
by the user.The TEI number is provided by the telephone
company for informational purposes only.
■Layer 1:UP
■SPID 1:Init
■TEI 1:Number from 0 to 127
■SPID 2:Init (if required)
■TEI 2:Number from 0 to 127 (if required)
14 Click Exit to leave the utility.
This completes the configuration procedure.
15 Install the TurboCom software.
Refer to the installation instructions that came with the
TurboCom software.
,
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