User`s guide

Polycom VVX Expansion Module Administrator’s Guide Addendum UC Software 4.1.6
Polycom, Inc. 23
This configuration results in the following favorites keys on the phone and module.
Use Busy Lamp Field Feature
Use the Busy Lamp Field (BLF) feature to monitor the status of lines on remote phones, display remote
party information, and answer incoming calls to remote phones on your VVX phone and expansion
modules.
The BLF feature must be supported by a call server, and the specific functions vary with the call server
you use. Consult with your SIP server partner or Polycom channel partner to find out how to configure
BLF. Note that BLF is not available with Polycom phones registered with Microsoft Lync Server.
The BLF feature offers the following functions:
● Visual and audible indications when monitored BLF lines have incoming calls, calls on hold, or are
busy
● Caller ID of incoming calls to remote monitored phones
● Pickup soft key that you can press to answer incoming calls to monitored resources
● A list of monitored contacts for a maximum of 47 contacts with configured line key labels
● Configurable key functions
● Ability to disable spontaneous call appearances from incoming calls on monitored lines
The following call servers support BLF:
● Back-to-Back2 User Agent (B2BUA) architecture
 Metaswitch Metasphere call feature server (CFS)