Welltech Dialogic SS7 Protocols ISUP Instrukcja Użytkownika Strona 71

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SS7 Protocols ISUP Programmer's Manual Issue 15
71
Information indicators
Network transport
Notification indicator
This parameter may be repeated (see
Appendix E: ISUP Repeat
Parameters on page 197).
6.6.23 Release Confirmation
This primitive is used by ISUP to indicate that the call clearing sequence has
completed and the circuit is again available for re-selection.
At the end of each call, the application must wait until the Release
confirmation (RLC) has been received before selecting the circuit for a new
outgoing call.
Message type
RLC (Release Complete Message)
Mandatory parameters
None
Optional parameters
The following optional parameters are supported in ITU-T mode only:
Cause indicators
6.6.24 Release Indication
This primitive is used by ISUP to initiate call clearing, either due to receipt of
a REL message from the network or having detected a local condition (such
as timer expiry) which requires call clearing.
On receipt of Release indication (REL) from ISUP the application should (if it
has not already issued Release request) respond immediately with a Release
request (REL). Then when the switch path has been cleared the application
should issue a Release response (RLC) to the ISUP module. Note that, if the
switch path is cleared immediately, only RLC (not REL followed by RLC) is
required.
Message type
REL (Release Message)
Mandatory parameters
Cause indicators
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