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Connecting Cisco ISDN PRI Network Modules to the Network
Online Insertion and Removal with a Cisco PRI Network Module (Cisco 3660 and Cisco 3745 Only)
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Connecting Cisco ISDN PRI Network Modules to the Network
CE1/PRI Network Module LEDs
Figure 25 and Figure 26 show CE1/PRI module LEDs. These LEDs are the same for balanced and
unbalanced modules.
Figure 25 1-Port CE1/PRI Network Module LEDs
Figure 26 2-Port CE1/PRI Network Module LEDs
Online Insertion and Removal with a Cisco PRI Network Module
(Cisco 3660 and Cisco 3745 Only)
Some Cisco modular access routers allow you to replace network modules without switching off the
router or affecting the operation of other interfaces. This feature is called online insertion and removal
(OIR). OIR of network modules provides uninterrupted operation to network users, maintains routing
information, and ensures session preservation.
Note To determine if your router supports OIR, see the hardware installation guide for your router.
Caution Cisco routers support OIR with similar modules only. If you remove a network module, install another
module exactly like it in its place. If you remove a network module with an installed interface card,
expansion module, or AIM, the replacement module should have the same hardware installed.
For a description of informational and error messages that may appear on the console during this
procedure, refer to the hardware installation guide for your type of router.
LOOPBACK
CTRLR 0
EN
cE1
PRI
H7262
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
CE1/PRI LEDs
Enable LED
LOOPBACK
CTRLR 0
EN
cE1
PRI
H7263
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
LOOPBACK
CTRLR 1
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
CE1/PRI LEDs Enable LED
CE1/PRI LEDs