Cisco 2600 Series Operation Manual page 75

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Figure 7-4
4-Port ISDN BRI S/T Network Module LEDs
BRI
S/T
Figure 7-5
8-Port ISDN BRI S/T Network Module LEDs
BRI
S/T
BRI 7
BRI 6
BRI 5
B1
B2
B1
B2
B1
B2
BRI S/T LEDs
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 listed in Table 7-2.
Table 7-2
BRI S/T Network Module LEDs
LED
Meaning
B1
Call active on B1 channel
B2
Call active on B2 channel
BRI 3
BRI 2
B1
B2
B1
B2
BRI S/T LEDs
BRI 4
BRI 3
BRI 2
B1
B2
B1
B2
B1
B2
BRI S/T LEDs
Connecting ISDN BRI Network Modules to a Network 7-5
BRI S/T Module LEDs
BRI 1
BRI 0
EN
B1
B2
B1
B2
Enable LED
BRI 1
BRI 0
EN
B1
B2
B1
B2
Enable LED

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