Cisco 3825 Hardware Installation Guide - Page 141

Chapter 7 Connecting ISDN PRI Network Modules Online Insertion and Removal with a Cisco PRI Network Module (Cisco 3660 and Cisco 3745 Only) 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 All Cisco PRI network modules have OIR support, but OIR is supported only on Cisco 3660 and Cisco 3745 platforms. 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. Upgrading ISDN PRI Network Modules If your Cisco 3600 series router contains a legacy ISDN PRI network module and a digital modem network module (product numbers NM-6DM, NM-12DM, NM-18DM, NM-24DM, or NM-30DM), your ISDN PRI network module may need to be upgraded to revision level -03 or higher. Earlier revisions of ISDN PRI network modules cannot send modem calls to the digital modem network module. Note Channelized T1/E1 PRI network modules with G.703 provide full support for Cisco digital modem network modules. If your PRI module is the wrong revision, you see a message similar to the following message when the router boots: The PRI network module in slot 0 is incompatible with the digital modems installed in the router. To determine the revision level, you can examine the network module itself (outside the router) or use the Cisco IOS show diag command. The label on the module board should show a part number beginning with 800- and ending with the revision level. The output of the show diag command looks similar to the following: Port adapter is analyzed Port adapter insertion time unknown Hardware revision 1.0 Board revision A0 Serial number 4152626 Part number 800-01236-01 Test history 0x0 RMA number 00-00-00 EEPROM format version 1 EEPROM contents (hex): 0x20: 01 26 01 00 00 3F 5D 32 50 04 CC 01 00 00 00 00 0x30: 50 00 00 00 96 11 04 17 FF FF FF FF FF FF FF FF OL-2485-20 Cisco Network Modules Hardware Installation Guide 7-17