Aastra Telecom 55I, 57I CT, 53I manual BLA Support for Third Party Registration, #line 1 Bob

Configuring Operational Features

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

Operational IP Phone Features

41-001160-00, Release 2.1, Rev 04 5-151