Version 6.6
245
MP-11x & MP-124
User's Manual
24. Configuring Supplementary Services
24.1 Call Hold and Retrieve
Initiating Call Hold and Retrieve:
Active calls can be put on-hold by pressing the phone's hook-flash button.
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).
Call retrieve can be performed only by the holding party while the call is held and
active.
The holding party performs the retrieve by pressing the telephone's hook-flash button.
After a successful retrieve, the voice is connected again.
Hold is performed by sending a Re-INVITE message with IP address 0.0.0.0 or
a=sendonly in the SDP according to the parameter HoldFormat.
Receiving Hold/Retrieve:
When an active call receives a re-INVITE message with either the IP address 0.0.0.0
or the ‘inactive’ string in SDP, the device stops sending RTP and plays a local held
tone.
When an active call receives a re-INVITE message with the ‘sendonly’ string in SDP,
the device stops sending RTP and listens to the remote party. In this mode, it is
expected that on-hold music (or any other hold tone) is played (over IP) by the remote
party.
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 HeldTimeout parameter.
Summary of Contents for MediaPack MP-112
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Page 14: ...User s Manual 14 Document LTRT 65417 MP 11x MP 124 Reader s Notes ...
Page 21: ...Part I Getting Started with Initial Connectivity ...
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Page 31: ...Part II Management Tools ...
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Page 91: ...Part III General System Settings ...
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Page 103: ...Part IV General VoIP Configuration ...
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Page 199: ...Part V Gateway Application ...
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Page 287: ...Part VI Stand Alone Survivability Application ...
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Page 319: ...Part VII Maintenance ...
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Page 347: ...Part VIII Status Performance Monitoring and Reporting ...
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Page 377: ...Part IX Diagnostics ...
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Page 403: ...Part X Appendix ...
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