ZXMSG 5200 (V2.0) Technical Manual
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ServiceChange (TerminationID,
ServiceChangeDescriptor
)
Parameters
The H.248 command contains different Descriptors that work with
commands to transfer media control information between MGC and MG.
These descriptors include:
1. Modem Descriptor
Define modem type and parameter.
2. Multiplex Descriptor
Multiple media streams are carried on different carriers in a multimedia
call, . The Multiplex Descriptor associates media with carrier.
3. Media Descriptor
Define all media streams parameters.
4. Termination State Descriptor
Define properties of the terminations that are unrelated with streams.
5. Stream Descriptor
List the remote/local/localControl descriptors of an individual media
stream.
6. LocalControl Descriptor
Define some media stream related characteristics in a termination.
7. Local and Remote Descriptor
Local means media streams that are received by MG, and Remote
means media streams that are sent by MG. MG uses the Local and
Remote descriptors to reserve and use MG resources, for media
encoding for specified streams and their used terminations.
8. Events Descriptor
Contain a list of a series of events that MG needs to detect and report.
9. EventBuffer Descriptor
Contain a series of parameter events for termination’s detection and
buffer.
10. Signals Descriptor
Identify signal tones that MGC requests one termination on MG to play.
11. Audit Descriptor
Define which information should be audited, and define a list of
descriptors to be returned.
12. ServiceChange Descriptor
Contain such parameters as service change mode, service change
reason and time stamp.
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