Call Hold And Resume - Matrix Sparsh VP110 User Manual

Call Hold and Resume

You can place an active call on hold. Only one active call can be in progress at any time. Other calls can be made
and received while placing the original call on hold. When you place a call on hold, your IP PBX may play Music on
Hold (MoH) to the other party while waiting.
For advanced users:
When a call is placed on hold, the IP phones 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 phones support two call hold methods, one is
RFC 3264, which sets the "a" (media attribute) in the SDP to sendonly, recvonly or inactive (e.g., a=sendonly). The
other is RFC 2543, which sets the "c" (connection addresses for the media streams) in the SDP to zero (e.g.,
c=0.0.0.0). Call hold tone allows IP phones to play a warning tone at regular intervals when there is a call on hold.
The warning tone is played through the speakerphone.
IP phones also support Music on Hold (MoH) feature. MoH is the business practice of playing recorded music to fill
the silence that would be heard by the party who has been placed on hold. To use this feature, specify a SIP URI
pointing to an MoH server account. When a call is placed on hold, the IP phone will send an INVITE message to the
specified MoH server account according to the SIP URI. The MoH server account automatically responds to the
INVITE message and immediately plays audio from some source located anywhere (LAN, Internet) to the held
party.
Procedure
Call hold can be configured using the configuration files or locally.
Configuration File
Local
To configure call hold method via web user interface:
• Click on Features->General Information.
154
<MAC>.cfg
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.
For more information, refer "Appendix
D ‐ Configuration Parameters".
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?p=features‐general&q=load
Matrix SPARSH VP110 User Guide