User's Manual

Extension Type Dialed
Number
Notes
Survivable Survivable 8XXXX Dial the extension number as shown on the
target extension. The call routing is done by
the Avaya Aura
®
Session Manager and
Communication Manager Feature Server.
No additional configuration is required.
Native Survivable 8XXXX Dial the extension number as shown on the
target extension. Because for our examples,
the survivable extension numbers begin with
the same 8 prefix as the branches, the
branch routes the call to the Avaya Aura
®
Session Manager where it matches the target
survivable extension.
Survivable Native 2XX A survivable extension user dials the
extension number of a native extension as
shown on that native extension.
Without additional configuration, the call will
not route as the Avaya Aura
®
Session
Manager cannot determine which branch is
intended. In that situation, the survivable
extension user needs to always include the
branch prefix of the intended native
extension. See Creating locations on
page 150 and Creating adaptations on
page 151 for more information.
If, as recommended, the survivable
extension has been installed with an IP
address that puts it at the same location as
the branch, then calls from the survivable
extension go through the digit adaptation
setup for that location. In that scenario we
can specify a digit conversion that adds the
branch prefix to any 2XX dialing received.
Such calls would then be routed back to the
branch.
8XXXX The configuration shown in the sectionInitial
configuration for a Centralized Branch on
page 95 will route the call to the correct
branch where it will be matched to the native
extension numbers.
Extension administration
184 Implementing the Avaya B5800 Branch Gateway November 2011
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