Matrix PRASAR UCS System Manual 673
• The returned call is disconnected, if the Extended IP Phone is not in idle state, or if the call is not answered
by Extended IP Phone.
To be able to place calls on Global Hold, you must select 'Global Hold' as the Default Call Hold Type in the System
Parameters of PRASAR UCS. The Extended IP Phone (which picks up the call) must have a DSS Key to access
the Trunk or the Extension which is put on hold. See “System Parameters” for instructions.
• PRASAR UCS provides the flexibility to use Exclusive Hold and Global Hold at the same time. You can
put calls on Exclusive Hold even when Global Hold is enabled in the system using the Hold Feature key
only.
• External calls can not be put on global hold.
• You must first retrieve the call that is put on Exclusive or Global Hold, if it is to be transferred or
included in a Conference.
Consultation Hold
During an on-going conversation, any Extended IP Phone can place a call on Consultation Hold to perform any of
the following:
• “Call Transfer”
• “Call Toggle”
• “Conference-3 Party”, “Conference-Multiparty”, “Conference Dial-In”
• “Call Park”
• “Mute”
• “Call Chaining”
• “Conversation Recording”
The call is released from the held state once the operation has been performed or canceled.
For instructions on using the above mentioned features, refer How to Use of the respective feature.
How to configure
For Exclusive and Global Hold, you must configure the following parameters:
• Class of Service: Call Hold must be enabled in the Class of Service (CoS) of the Extended IP Phone you
want to allow this feature.
By default, Station Basic Feature Template 01 assigned to all extensions of PRASAR UCS, Call Hold is
included in the 'Basic Features' assigned to all Class of Service groups, including the default CoS group
01. So, all extensions of PRASAR UCS can use this feature.
Refer the topics “Class of Service (COS)” and “Station Basic Feature Template” to know more.
• Call Hold Type: Enable the desired option, that is, Exclusive Hold or Global Hold in the “System
Parameters”.
• Send Re-INVITE over SIP Trunk on Hold: When an external call over a SIP Trunk is put on hold by any
extension, and you want PRASAR UCS to send Re-INVITE message over SIP Trunk to the remote end,
you must enable this flag on the SIP Trunk. See “Configuring SIP Trunks” to know more.
• DSS Keys: Program DSS Keys for Trunks and Extensions which are allowed to retrieve calls on Global
Hold. Program the DSS Keys for Exclusive Hold, if required. Refer the topic “DSS Keys Programming”,
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