User Guide for T5 Series IP Phones
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Bridged Line Appearance (BLA)
BLA allows users to share a SIP line on two or more IP phones. Users can monitor the specific
extension (BLA number) for status changes on each IP phone. To use this feature, a BLA group
should be pre-configured on the server and one of them is specified as a BLA number. BLA
depends on the support from a SIP server.
In the following figure, the first line is a private line while the second line is a shared line:
Any IP phone can be used to originate or receive calls on the bridged line. An incoming call to
the BLA number can be presented to multiple phones in the group simultaneously, but only one
IP phone within the group can answer this call.
Configuring BLA Feature on the IP Phone
You can share a BLA number on two or more phones. For example, phone A registers the
account 14019833020 (register name is 14019833020 and user name is 14084588327) and
assigns BLA number, phone B registers the account 10462190020 (register name is
10462190020, user name is 14084588327) and assigns BLA number, phone C registers the
account 14755608020. Phone A and phone B share the BLA number 14084588327. For more
information on how to register an account, refer to
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