Physical Description 2-1
Chapter 2Physical Description

This chapter provides information about the hardware features of the Model XM128U ISDN

Digital Modem. Use the key at the bottom of each illustration to identify the panel components.

Front Panel

For easier management and control of the Model XM128U modem, familiarize yourself with the

components on the front panel, as illustrated in Figure2-1.

Key:
1 = PWR (power) LED
2 = ISDN LEDs
3 = RS-232 COM LEDs
4 = PHONE 1 and PHONE 2 LEDs
Figure 2-1. Front panel of the Model XM128U modem (with S/T interface)
8262EA
DTR DSR RTS CTS TDDPWR B1 B2 AA CP
ISDN
RD 12
ISDN Digital Modem
INTERFACE
128Kpbs MODELXM128
U
COM
2 3 4
1
Xm128u_bk.fm Page 1 Wednesday, February 4, 1998 4:32 PM