User's Manual

Name Default Description
system using the Name and
Login Code configured for
the user within the B5800
Branch Gateway
configuration. For
centralized extensions this
should be set to On.
Extension Mode Default = Local
• For survivable extensions,
this must be set to
Centralized.
• For native extensions, this
must be set to Local.
DID Numbers Default = Blank
• This field does not apply to
native extensions. When
configuring a native
extension, leave this field
blank.
• When configuring a
survivable extension (also
referred to as a centralized
extensions), this field is
optional for systems where
there is a clear mapping of
DID numbers to extension
number, for example DID
01555364123 and
extension 884123. Another
usage is if the phone
registers with extension
number using branch
prefix, but expects to be
dialed using short format.
This relies on the behavior
that when Session
Manager lines are out of
service, if the branch has a
call (internal or external)
targeted to the Session
Manager line, it tries to first
target any matching
centralized extension DID
and then any centralized
extension number before
checking any alternative
routes configured.
Extension administration
180 Implementing the Avaya B5800 Branch Gateway November 2011
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