Cisco 3825 Hardware Installation Guide - Page 277

Chapter 24 Connecting Cisco Unity Express Enhanced Network Modules Online Insertion and Removal of Cisco Unity Express Enhanced Network Modules Shutting Down Cisco Unity Express Enhanced Network Modules Press the Shutdown button on the network module faceplate for less than 2 seconds to perform a graceful shutdown of the network module before removing power from the router or before starting an online insertion and removal (OIR) sequence on the router. The application may take up to 2 minutes to fully shut down. Caution If you press the Shutdown button for more than 4 seconds, a nongraceful shutdown of the hard disk will occur and may corrupt files on the network module's hard disk. After a nongraceful shutdown, the HD and SYS LEDs remain lit. Press the Shutdown button for less than 2 seconds to gracefully reboot the network module. Online Insertion and Removal of Cisco Unity Express Enhanced Network Modules Some Cisco 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 a module provides uninterrupted operation to network users, maintains routing information, and ensures session preservation. Caution Unlike other network modules, Cisco Unity Express enhanced network modules use hard disks. Online removal of disks without proper shutdown can cause file system corruption and might render the disk unusable. You must shut down the operating system on the network module in an orderly way before removing or powering down the module. Caution Cisco routers support OIR with similar modules only. If you remove a module, install another module exactly like it in its place. If you remove a 2-slot module (along with any installed WAN or voice interface cards), install another module and card combination exactly like it. For a description of informational and error messages that may appear on the console during this procedure, see the hardware installation guide for your router. Caution If you need to preserve the data on the Cisco Unity Express enhanced network module, or need to transfer the data to a new Cisco Unity Express enhanced network module, perform a backup of the data before removing the module, and restore the data after installing the new module. For more information about backing up and restoring data, see the "Backup and Restore" chapter in the Cisco Unity Express 3.0 Voice-Mail and Auto-Attendant CLI Administrator Guide: http://www.cisco.com/en/US/products/sw/voicesw/ps5520/products_administration_guide_chapter091 86a0080874eb2.html OL-2485-20 Cisco Network Modules Hardware Installation Guide 24-3