Avaya Nortel Communication Server 1000 Manual page 66

66 Features
Firmware downloads
If the IP Phone has an active media stream, the LTPS does not request the
firmware download in order to avoid resetting the IP Phone and losing the
call. Therefore, it is possible that a system has IP Phones with a mixture
of firmware versions registered with it. The firmware can be downloaded
later, after the idle IP Phone registers again or can be downloaded manually
using appropriate CLI commands.
WLAN Handsets 2210/2211/2212/6120/6140
The Wireless LAN (WLAN) Handsets 2210/2211/2212/6120/6140 support
Active Call Failover in the same manner as Phase II IP Phones if their
firmware supports UNIStim 2.9.
Operating parameters
IP Peer calls
IP Peer calls survive the following failure types:
•
•
•
IP Peer calls do not survive the Call Server cold start; all virtual trunks are
idled as the Call Server comes back up after the cold start. In this case, the
local IP Phone must go on-hook to become idle.
The zone bandwidth usage in the zone table remains zero for all IP Peer
calls on this side; zone bandwidth usage is cleared for all calls as the Call
Server comes back up after the warm start. In this case, Network Bandwidth
Management information is lost and the Call Server is unable to restore the
correct zone bandwidth usage for IP Peer calls.
IP/TDM calls
IP/TDM calls do not survive a Call Server cold start; all DSP channels are
closed as the Call Server comes back up after the cold start. In this case,
the local IP Phone must go on-hook to become idle.
Dialing state
Only established calls survive failures. All calls having the DIALING state on
the Call Server are released when an LTPS or signaling failure occurs that
causes an IP Phone to unregister.
Copyright © 2003–2008, Nortel Networks
.
TLAN subnet failures.
Signaling Server platform failures/restarts. When the Signaling Server
reboots after the failure, all sessions are lost. Therefore, when the
local IP Phone or far-end telephone releases the call, no RELEASE
message is sent to the other party. The other party must go on-hook
to become idle.
Call Server warm starts.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008