Cisco 2600 Series Operation Manual page 76

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4-Port and 8-Port ISDN BRI U Network Modules
4-Port and 8-Port ISDN BRI U Network Modules
This section provides information about the following network modules for Cisco modular
routers:
4-port ISDN BRI with NT1 network module—(Cisco product number NM-4B-U or
CPANM-4B-U). Connects to an ISDN WAN using a built-in NT1 device (also known
as a U interface). (See Figure 7-6.) This module is also referred to as the 4-port BRI U
network module.
8-port ISDN BRI with NT1 network module—(Cisco product number NM-8B-U or
CPANM-8B-U). Connects to an ISDN WAN using a built-in NT1 device (also known
as a U interface). (See Figure 7-7.) This module is also referred to as the 8-port BRI U
network module.
Figure 7-6
BRI
U
7-6
Cisco Network Modules Hardware Installation Guide
4-Port ISDN BRI with NT1 Network Module (U Interface)
BRI 3
BRI 2
B1
B1
B2
B2
BRI U ports (RJ-45)
BRI 1
B1
B2
BRI 0
B1
B2
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