This chapter explains Acme Packet 6400 hardware maintenance procedures and provides hardware alarm information. Although several user-replaceable components of the Acme Packet 6400 are hot-pluggable, some Acme Packet 6400 maintenance procedures require that you shut down the system.

Before you shut down or restart the Acme Packet 6400, ensure that there are no active calls in progress. Procedures to reroute call and network traffic around the Acme Packet 6400 are outside the scope of this guide.

You can set the Acme Packet 6400 to reject all incoming calls from your system with the set-system-state command. When set to offline, this command lets calls in progress continue uninterrupted, but no new calls are admitted.

After all call processing has stopped, you must halt the operating system before you power off your Acme Packet 6400. Shutting down the system is appropriate when you are replacing a physical interface card, transcoding module, power supply, or are removing the Acme Packet 6400 from the equipment rack.