Failover/Failback Administrative Monitoring And Logging; About The User Interface/Failover Experience; User Interface In Failover/Failback - Avaya 9608 Administration

stored in Communication Manager; Session Manager does not store any information
related to any call.
Preserved Media Connections - Applies only to Session Manager configurations when
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moving a subscription from one Session Manager to another. In a scenario where the
primary Session Manager fails, any active shuffled or direct media call will be preserved if
a new call is received while a preserved call is active. The deskphone allows the user to
manually put the active (media preserved) call on hold or allows the user to switch to the
new call and automatically put the preserved call on hold using auto-hold. A media
preserved call displays the failover icon in place of a call-associated icon that is left
justified on an application line preceding the displayed name or deskphone number. When
active on a media preserved call the softkeys displayed are "Hold, blank, blank, End Call."
Conference and Transfer are not available. When a media preserved call is put on hold,
the softkeys displayed are "Resume, blank, blank, blank." The deskphone can receive
incoming calls at this point but is not available to make outgoing calls or to invoke AST
features. The deskphone supports media preservation sufficient for alternate registration;
if a deskphone experiences a mid-dialog failure (for example, a timed out or failed SIP
request, or a socket-level failure), the deskphone behaves as if the dialog had been
terminated (but does not send a BYE) and preserves the media session until the near-end
user hangs up.

Failover/failback administrative monitoring and logging

The deskphone must be able to identify the active controller from the configured controllers.
This information is available in the SNMP MIB, which the network administrator can view; the
Active Controller is the SIPPROXYSRVR_IN_USE value. The deskphone sends an SNMP
notification whenever a transition occurs. In addition, whenever the appropriate level of logging
is enabled, the deskphone logs its transitions from one server to another.

About the user interface/failover experience

The user interface experiences described below expand upon the information provided in
Failover/failback
in a user friendly format.

User interface in failover/failback

Failover (F/O) transition - Connection to Session Manager failed, the deskphone detects F/
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O and blocks new invites while the deskphone is in transition.
Stable in F/O where the non-primary proxy is the active controller.
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behavior. User guides for each deskphone model also provide this information
About the user interface/failover experience
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