User guide

Deployment Guide for the Polycom VVX 1500 C Business Media Phone
3 - 10
Voice Mail Integration
The phone is compatible with voice mail servers. The subscribe contact and
callback mode can be configured per user/registration on the phone. Voice
mail access can be configured to be through a single key press. A
message-waiting signal from a voice mail server triggers the message-waiting
indicator to flash and the call waiting audio tone is played through the active
audio path.
Configuration changes can be performed centrally at the provisioning server
or locally. For detailed information on configuration file settings, refer to
<msg/> on page A-7.
Shared Call Appearances
Calls and lines on multiple phones can be logically related to each other. A call
that is active on one phone will be presented visually to phones that share that
call appearance. Mutual exclusion features emulate traditional PBX or key
system privacy for shared calls. Incoming calls can be presented to multiple
phones simultaneously. Users at the different locations have the ability to
interrupt remote active calls.
This feature is dependent on support from a SIP server that binds the
appearances together logically and looks after the necessary state notifications
and performs an access control function.
Configuration changes can be performed centrally at the provisioning server
or locally. For detailed information on configuration file settings, refer to
<reg/> on page A-6.
H.323 Protocol
Telephony signaling support via the H.323 family of protocols enabling direct
communication with H.323 endpoints, gatekeepers, call and media servers,
and signaling gateways is supported on the Polycom VVX 1500 C phone.
SIP and H.323 signaling can be supported at the same time, including bridging
both types of calls during multi-party conference calls. Automatic detection of
the correct or optimal signaling protocol is available when dialing from the
contact or corporate directories. While SIP supports server redundancy and
several transport options, only a single configured H.323 gatekeeper address
per phone is supported. H.323 gatekeepers are optional, but if available, they
must be used. If a gatekeeper is not configured or unavailable, calls can still be
made if so configured.
Support of the SIP protocol for telephony signaling can be disabled on the
Polycom VVX 1500 C such that all calls would be routed via the H.323
protocol.