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Reference Guide for the Model XM128 ISDN Digital Modem

Introduction 1-3

Interface Options

Several interfaces are available. Table 1-1 lists the interface options for the Model XM128 modem

as applicable for each region.

For the North American ISDN, NETGEAR provides an optional 2B1Q U interface to allow direct

connection to the network without the use of an external NT-1 device.

Front Panel

For easier management and control of the Model XM128 modem, familiarize yourself with the

components on the front panel, as illustrated in Figure 1-1 and Figure 1-2. Use the key at the

bottom of each illustration to identify the panel components.

Key:

1 = PWR (power) LED

2 = ISDN LEDs

3 = RS-232 COM LEDs

4 = PHONE 1 and PHONE 2 LEDs

Figure 1-1. Front panel of the Model XM128 modem (with S/T interface)

Table 1-1. Interface options

XM128NA XM128GE XM128UK XM128AU XM128JP

Unit XM128U XM128S XM128S XM128S XM128D

Region North America Germany UK Australia Japan

Interface U (internal NT-1) S/T S/T S/T Internal DSU

Auto SPID Switch

7848MEA

DTR DSR RTS CTS TDDPWR B1 B2 AA CP

ISDN

ISDN Digital Modem

INTERFACE

128Kpbs

MODEL

XM128

COM

2 3 4

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 155 156

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