Cisco 3600 - 24 Port Digital Modem Network Module Installation Guide Page 73

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Connecting ISDN BRI Network Modules to a Network 7-3
4-Port and 8-Port ISDN BRI S/T Network Modules
4-Port and 8-Port ISDN BRI S/T Network Modules
This section provides information about the following network modules for Cisco modular
routers:
4-port ISDN BRI network module—(Cisco product number NM-4B-S/T or
CPANM-4B-S/T). Connects to an ISDN WAN through an external Network
Termination 1 (NT1) device (also known as an S/T interface). (See Figure 7-1.) This
module is also referred to as the 4-port BRI S/T network module.
8-port ISDN BRI network module—(Cisco product number NM-8B-S/T or
CPANM-8B-S/T). Connects to an ISDN WAN through an external NT1 device (also
known as an S/T interface). (See Figure 7-2.) This module is also referred to as the
8-port BRI S/T network module.
Figure 7-1 4-Port ISDN BRI Network Module (S/T Interface)
Figure 7-2 8-Port ISDN BRI Network Module (S/T Interface)
BRI 3 BRI 2 BRI 1 BRI 0
EN
BRI
S/T
H7267
BRI S/T LEDs
B1 B2 B1 B2 B1 B2 B1 B2
Enable LED
BRI 7 BRI 6 BRI 5 BRI 4 BRI 3 BRI 2 BRI 1 BRI 0
EN
BRI
S/T
H7254
BRI S/T ports (RJ-45) BRI S/T ports (RJ-45)
B1 B2 B1 B2 B1 B2 B1 B2 B1 B2 B1 B2 B1 B2 B1 B2
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