Hewlett-Packard Mediant 2000 User's Manual
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Brand: HP
Category: Gateway
Type: Operation & user’s manual for HP Mediant 2000
Pages: 496 (6.06 Mb)
SIP User's Manual 432 Document #: LTRT-68809
Mediant 2000
9.14 Working with Supplementary Services
The device supports the following supplementary services:
Call Hold and Retrieve (refer to ''Call Hold and Retrieve'' 432 on page )
Call Transfer (refer to ''Call Transfer'' 432 on page )
Call Forward (refer to ''Call Forward'' 433 on page )
Call Waiting
Three-way conferencing (refer to Three-Way Conferencing)
The device SIP users are only required to enable the Hold and Transfer features. By
default, the Call Forward (supporting 30x redirecting responses) and Call Waiting (receipt of
182 response) features are enabled.
Notes:
• All call participants must support the specific supplementary service that
is used.
• When working with certain application servers (such as BroadSoft’s
BroadWorks) in client server mode (the application server controls all
supplementary services and keypad features by itself), the device's
supplementary services must be disabled.
9.14.1 Call Hold and Retrieve
Hold and Retrieve:
The party that initiates the hold is called the holding party; the other party is called the
held party.
After a successful Hold, the holding party hears a Dial tone (HELD_TONE defined in
the device's Call Progress Tones file).
The device can't initiate Call Hold, but it can respond to hold requests and
as such, it's a help party.
After a successful retrieve, the voice is connected again.
You can also configure the device to keep a call on-hold for a user-defined time after which
the call is disconnected, using the ini file parameter HeldTimeout (refer to ''Configuring
Supplementary Services'' on page
The hold and retrieve functionalities are implemented by Re-INVITE messages. The IP
address 0.0.0.0 as the connection IP address or the string ‘a=inactive’ in the received
Re-INVITE SDP cause the device to enter Hold state and to play the Held tone
(configured in the device) to the PBX/PSTN. If the string ‘a=sendonly’ is received in the
SDP message, the device stops sending RTP packets, but continues to listen to the
incoming RTP packets. Usually, the remote party plays, in this scenario, Music on Hold
(MOH) and the device forwards the MOH to the held party.
123).