Polycom SOUNDPOINT SIP 2.2.0 - Manual (Page 65)

Configuring Your System
4 - 17
Call Transfer
Call transfer enables the user (party A) to move an existing call (party B) into
a new call between party B and another user (party C) selected by party A. The
phone offers three types of transfers:
• Blind transfers—The call is transferred immediately to party C after party
A has finished dialing party C’s number. Party A does not hear ring-back.
• Attended transfers—Party A dials party C’s number and hears ring-back
and decides to complete the transfer before party C answers. This option
can be disabled.
• Consultative transfers—Party A dials party C’s number and talks
privately with party C after the call is answered, and then completes the
transfer or hangs up.
Configuration changes can performed centrally at the boot server:
Local / Centralized Conferencing
The phone can conference together the local user with the remote parties of a
configurable number of independent calls by using the phone’s local audio
processing resources for the audio bridging. There is no dependency on
network signaling for local conferences.
The phone also supports centralized conferences for which external resources
are used such as a conference bridge. This relies on network signaling.
Central
(boot server)
Configuration file:
sip.cfg Specify whether to allow a transfer during the proceeding state of a
consultation call.
• For more information, refer to SIP <SIP/> on page A-10 .
Specify whether a transfer is blind or not.
• For more information, refer to Call Handling Configuration <call/>
on page A-55 .
Note Conferences are not available when the G.729 codec is enabled on the
SoundStation IP 4000 conference phone.