Administrator’s Guide for SIP-T2xP and SIP-T19P IP Phones
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5. Click Confirm to accept the change.
Call forward allows users to redirect an incoming call to a third party. IP phones redirect
an incoming INVITE message by responding with a 302 Moved Temporarily message,
which contains a Contact header with a new URI that should be tried. Three types of call
forward:
Always Forward -- Forward the incoming call immediately.
Busy Forward -- Forward the incoming call when the phone or the specified
account is busy.
No Answer Forward -- Forward the incoming call after a period of ring time.
Call forward can be configured on a phone or a per-line basis depending on the call
forward mode. The following describes the call forward modes:
Phone (default): Call forward feature is effective for the IP phone.
Custom: Call forward feature can be configured for each or all accounts.
The server-side call forward settings disable the local call forward settings. If the
server-side call forward feature is enabled on any of the phone’s registrations, the other
registrations are not affected. DND activated on the IP phone disables the local no
answer forward settings.
The call forward on code and call forward off code configured on IP phones are used to
activate/deactivate the server-side call forward feature. They may vary on different
servers.
IP phones support the redirected call information sent by the SIP server with Diversion
header, per draft-levy-sip-diversion-08, or History-info header, per RFC 4244. The
Diversion/History-info header is used to inform the phone of a call’s history. For example,
when a phone has been set to enable call forward, the Diversion/History-info header
allows the receiving phone to indicate who the call was from, and from which phone
number it was forwarded.
Forward International
Forward international allows users to forward an incoming call to an international
telephone number. This feature is enabled by default.
Procedure
Call forward can be configured using the configuration files or locally.
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