Matrix SPARSH VP710, User Manual, Page: 392 / 1046

384 Matrix SPARSH VP710 User Guide
Call Hold/Resume
Call hold allows you to place an active call on hold. The purpose of call hold is to pause the activity on the existing
call so that you can use the phone for other task (e.g. to place or receive another call).
Only one active call can be in progress at a time. Other calls can be made or received while placing the original call
on hold. When you place a call on hold, your IP PBX may play Music to the other party while waiting.
Call hold tone allows the IP phone to play a warning tone at regular intervals when a call is on hold. The warning
tone is played through the speakerphone.
When a call is placed on hold, the IP phone send an INVITE request with HOLD SDP to request remote parties to
stop sending media and to inform them that they are being held.
IP phone supports two call hold methods:
• RFC 3264, which sets the “a” (media attribute) in the SDP to sendonly, recvonly or inactive (e.g.,
a=sendonly).By default, this method is selected.
• RFC 2543, which sets the “c” (connection addresses for the media streams) in the SDP to zero (e.g.,
c=0.0.0.0).
Procedure
Call hold can be configured using the configuration files or locally.
Configuration File <MAC>.cfg
Configure the call hold tone and call
hold tone delay.
Specify whether RFC 2543 (c=0.0.0.0)
outgoing hold signaling is used.
For more information, refer “Appendix
D - Configuration Parameters” .
Local Web User Interface
Configure the call hold tone and call
hold tone delay.
Specify whether RFC 2543 (c=0.0.0.0)
outgoing hold signaling is used.
Navigate to:
http://<phoneIPAddress>/servlet?m
=mod_data&p=features-general&q
=load