Reference Guide for the Model XM128 ISDN Digital Modem

1-6 Introduction

Rear Panel

As illustrated in Figure1-3 and Figure 1-4, the rear panel contains a power switch, a power

receptacle, and ports to connect a computer, ISDN line, and two analog devices (phone, fax, or

modem).

key:
1 = ON/OFF switch
2 = Receptacle for power adap ter
3 = RS-232 COM port for connecting to a compu ter
4 = ISDN port for connec ting to an ISDN line NT-1
5 = PHONE 1 and PHONE 2 ports for connecting analog devices (telephone, fax, or modem)

Figure 1-3. Rear panel of the Model XM128 modem (with S inter face)

Key:
1 = ON/OFF switch
2 = Receptacle for power adap ter
3 = RS-232 COM port for connecting to a compu ter
4 = ISDN port for connec ting to an ISDN line
5 = PHONE 1 and PHONE 2 ports for connecting analog devices (telephone, fax, or modem)

Figure 1-4. Rear panel of the Model XM128 modem (with U interface)

7861MEA
RS-232
POWER
ON/OFF
1 2 3
ISDN-S PHONE 1PHONE 2
5
4
7862MEA
RS-232
POWER
ON/OFF
1 2 3
ISDN-U PHONE 1PHONE 2
5
4