Nortel Networks NN10265-111 - Manual (Page 36)

NN10265-111 MCS 5100 3.5 Standard 4.0 January 2006
36 Copyright © Nortel Networks Limited 2006
Application Module to immediately begin utilization of the RTP
Media Portal for session requests whenever a failure condition
occurs on the Active SIP Application Module.
• Idle Session Detection
— enables the RTP Media Portal to detect and recover media
resources associated with idle media sessions. This basic
capability enables the system to recover resources as well as
maintain capacity and performance.
• Media Survivability
— enables the RTP Media Portal to allow media sessions to survive
(through to session completion) in the absence of control
signaling from the SIP Application Module. This capability
enables the system to permit media sessions to continue
through to completion in the wake of loss of communications
with SIP Application Module gateway controllers.
• Host IP Failover
— provides redundant (active/standby) network connectivity for the
RTP Media Portal host card so that if there is a network issue
that affects one of the connections then the other connection will
assume activity. This functionality enables the RTP Media Portal
to maintain control and OAM connectivity in the event of a
network failure.
• Shared Resource
— enables the distribution of RTP Media Portal resources through
association with multiple SIP Application Modules. The strategy
of distributing media sessions over multiple RTP Media Portals
strengthens the network's ability to continue processing
sessions in the event of a failure condition. Failures would result
in diminished capacity, but not necessarily a service outage
since many other RTP Media Portals remain available for SIP
Application Modules to utilize.
• Host CPU Recovery
— provides for media stream survival through a Host CPU failure
and subsequent recovery. Upon Host CPU failure, media
streams on subtending Media Blades continue to flow
undisturbed. During the subsequent Host CPU recovery
process, communications are re-established with the Media
Blades and available capacity information is retrieved from each
of the Media Blades. When the RTP Media Portal resumes