Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 121

Chapter 6 Connecting ISDN BRI Network Modules
BRI S/T Module LEDs
Figure 6-4
BRI S/T network module.
Figure 6-4
BRI
S/T
Figure 6-5
BRI
S/T
All network modules have an enable (EN) LED. This LED indicates that the module has passed its
self-tests and is available to the router.
In addition, BRI S/T modules have two LEDs for each port. These LEDs indicate call activity on the two
ISDN BRI B channels, as described in
Table 6-1
LED
B1
B2
4- and 8-Port ISDN BRI U Network Modules
This section provides information about the following network modules for Cisco modular routers:
•
•
OL-2485-20
shows LEDs for the 4-port BRI S/T network module.
4-Port ISDN BRI S/T Network Module LEDs
8-Port ISDN BRI S/T Network Module LEDs
BRI 7 BRI 6 BRI 5 BRI 4
B1 B2 B1 B2 B1 B2 B1 B2
BRI S/T LEDs
BRI S/T Network Module LEDs
Meaning
Call active on B1 channel
Call active on B2 channel
4-port ISDN BRI with NT1 network module (NM-4B-U or CPANM-4B-U) (see
module connects to an ISDN WAN using a built-in NT1 device (also known as a U interface). It is
also referred to as the 4-port BRI U network module.
8-port ISDN BRI with NT1 network module (NM-8B-U or CPANM-8B-U) (see
module connects to an ISDN WAN using a built-in NT1 device (also known as a U interface). It is
also referred to as the 8-port BRI U network module.
Figure 6-5
BRI 3 BRI 2 BRI 1 BRI 0
B1 B2 B1 B2 B1 B2 B1 B2
BRI S/T LEDs
BRI 3 BRI 2 BRI 1 BRI 0
B1 B2 B1 B2 B1 B2 B1 B2
Enable LED
BRI S/T LEDs
Table 6-1.
Cisco Network Modules Hardware Installation Guide
4- and 8-Port ISDN BRI U Network Modules
shows LEDs for the 8-port
EN
Enable LED
EN
Figure
Figure
6-6). This
6-7). This
6-3