4000 Router Series Interface Module Guide

164

2. If the service provider provides an ISDN S/T interface cable, directly connect the service provider

cable to the BSV interface.

Figure 153 Connecting a service provider S/T interface cable to a BSV interface module

• When the BSV interface works in Network mode, you must use an ISDN S/T interface crossover

cable to connect the BSV interface to a TE device such as a digital telephone or a BSV interface

working in User mode:

Connect the RJ45 connector (male) of the ISDN S/T interface crossover cable to the RJ45 interface on the

BSV interface module. Connect the RJ45 interface (female) of the standard ISDN S/T interface cable to

one end of the standard ISDN S/T interface cable. Connect the S/T interface on the TE device to the

other end of the standard ISDN S/T interface cable.

Figure 154 Connecting a TE device to a BSV interface module

Connecting a FIC-4BSE interface module cable

Choose the cable connection type according to the service provider line type:

1. If the service provider provides an ISDN U interface cable, you must use an NT1 device for

adaptation. Connect one end of the standard ISDN S/T interface cable to the RJ45 interface of the

BSE interface module. Connect the other end of the standard ISDN S/T interface cable to the S/T

interface of the NT1 device. Connect the ISDN U interface cable to the U interface on the NT1

device.

ISDN S/T interface crossover cable

BSV

S/T

ISDN S/T interface standard cable