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Chapter 3. installing an analog modem – ADTRAN Express XRT User Manual

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Chapter 3. Installing an Analog Modem

36

Express XRT User Guide

61202.153L3-1

Figure 3-7

Internal Analog Modem Application

When using an internal analog modem and the Express XRT, two
COM ports are assigned on the PC. Both COM ports are config-
ured independently. See the manufacturer's documentation for
internal analog modem configuration.

Connecting an Internal Analog Modem

To connect an internal analog modem to the Express XRT, use the
following procedure:

1. Ensure the Express XRT is connected to the PC. See the section

Connecting the Express XRT on page 6 for detailed instructions.

2. Connect one end of the RJ-11 to RJ-11 telephone cable to the

telephone jack labeled 2 on the Express XRT. Positioned above
the jack is an illustration of a telephone above a modem.

3. Connect the other end of the RJ-11 to RJ-11 telephone cable to

the Dial Line or Line jack on the internal analog modem. See
the documentation for the internal analog modem to determine
which jack on the internal analog modem is the Dial Line or
Line

jack.

ISDNU

OFF

ON

2

1

MODEM

RS232

POWER

1

2

3

4

RS-232 Cable

COM
Port

ISDN Telephone

Wall Jack

AnalogTelephone

Internal Analog Modem

Dial Line Jack

Rear View

of PC

AC Outlet

RJ-11 to RJ-11

Telephone Cable

RJ-45 to RJ-45

Cable

RJ-11 to RJ-11

Telephone Cable

NT1