Aastra 5i Series, Administrator'S Manual

Page: 509 / 1134

Operational Features
41-001160-01, Rev 00, Release 2.3 5-217
Configuring Operational Features
BLA Support for Third Party Registration
BLA allows an Address Of Record (AOR) to be assigned onto different line
appearances for a group of SIP user agents (IP phones). When a call is made to
this BLA number, the call is offered to all user agents that have mapping to this
BLA. To support this, the IP phones need to support third party registration for the
BLA along with the registration for its own primary appearance number. If the IP
phone has the primary appearance as a BLA, then there is no need for third party
registration.
When configuring the BLA feature on a per-line basis for third party registration
and subscription, the third party name must be configured using the “
sip lineN bla
number ” parameter. For third party registration to work effectively, one of the
lines should register as generic with its own username.
For example, Bob has Alice’s appearance on his phone. Bob’s configuration is as
follows:
#line 1 Bob
sip line1 auth name:4082272203
sip line1 password:
sip line1 mode: 0
sip line1 user name:4082272203
sip line1 display name:Bob
sip line1 screen name:Bob
#line 2 Alice
sip line2 auth name:4082272203
sip line2 password:
#BLA mode 3
sip line2 mode: 3
sip line2 user name:4082272203