Configuration manual

However, if PSTN trunk fallback has been configured, the other Avaya Aura
®
Session Manager
line will be used. See PSTN trunk fallback on page 294 for more information.
Avaya Aura
®
Session Manager line service status checks
The B5800 Branch Gateway system sends regular SIP OPTIONS messages to any Avaya
Aura
®
Session Manager lines in its configuration. The Proactive and Reactive settings on the
B5800 Branch Gateway system's System tab set how often the SIP OPTIONS messages are
sent in seconds. The Proactive setting is used for an Avaya Aura
®
Session Manager line
currently thought to be in service. The Reactive setting is used for an Avaya Aura
®
Session
Manager line currently thought to be out of service.
• If a response is received and is not a 408, 500, 503 or 504 response, the Avaya Aura
®
Session Manager line is treated as in service; otherwise the line is treated as being out
of service.
• If no response is received within 32 seconds (SIP Timer F), the line is treated as being
out of service.
• If the line is out of service, and call comes from the trunk, the trunks status is changed
back to in service.
• If the line is in service, a call may fail due to either being unable to deliver the message
or receive a 100 response within a configured timeout. The line will not go out of service
because this may be a temporary failure due to a busy system.
Secondary Avaya Aura
®
Session Manager line configuration
The secondary Avaya Aura
®
Session Manager line is configured in the same way as the
primary Avaya Aura
®
Session Manager line. The only difference required is to set the SM
Address field to the address of the alternate Avaya Aura
®
Session Manager from the one being
used by the primary Avaya Aura
®
Session Manager line.
Setting up outgoing call routing
About this task
For calls from extensions on the B5800 Branch Gateway system to other numbers within the
network, system short codes are used to route the calls to the Avaya Aura
®
Session Manager
line. The Avaya Aura
®
Session Manager then performs the routing to determine where the call
should go.
Note:
See
Branch PSTN call routing examples on page 289 for information on routing back to the
branch for fallback alternate routes.
Note:
If using Avaya Aura
®
Conferencing 7.0, the B5800 Branch Gateway short code should
include routing to Session Manager any call that is made to the Avaya Aura
®
Conferencing
7.0 number.
Ideally the number of such system short codes should be kept to a minimum and the same
short codes used on all branches in order to ease maintenance. This is where using a uniform
Administering a Session Manager line for each branch
Implementing the Avaya B5800 Branch Gateway for an Avaya Aura
®
Configuration October 2012 151