Chapter 3. Installing an Analog Modem

COM

Rear View

Port

of PC

 

RS-232 Cable

Dial Line Jack Internal Analog Modem

 

RJ-11 to RJ-11

 

Telephone Cable

AC Outlet

 

 

 

OFF

 

 

 

 

 

ON

 

 

POWER

RS232

MODEM

2

1

ISDNU

RJ-11 to RJ-11

Telephone Cable

RJ-45 to RJ-45

Cable

NT1

ISDN Telephone

Wall Jack

AnalogTelephone

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.

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Express XRT User Guide

61202.153L3-1

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ADTRAN Express XRT manual Internal Analog Modem Application, Connecting an Internal Analog Modem