Welltech Dialogic SS7 Protocols ISUP Manual de usuario Pagina 44

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Section 6 Interface to Application
44
Optional parameters
The following parameters are supported in ITU-T mode only
Cause indicators
6.5.24 Release Request
This primitive is used by the application to initiate call clearing and as an
immediate response to a received Release indication primitive from the ISUP
module.
To initiate call clearing, the application should send this message to the ISUP
module. It should then wait until a Release confirmation (RLC) is received
from the ISUP module before selecting the circuit for a new outgoing call
attempt. Refer to
Section : 6.8.1 Call Clearing Procedure on page 90 for
further information.
Message type
REL (Release Message)
Mandatory parameters
None
Optional parameters
Access transport
Cause indicators
Defaults to the following if not supplied:
Coding standard = ITU-T
Location = User
Recommendation = Q.931
Cause Value = Normal. Unspecified
Generic number (address)
This parameter may be repeated in this message
Signalling point code
User to user information
Discarded if user to user service 1 has not been accepted
User to user indicators
The following optional parameters are supported in ITU-T mode only
Access delivery information
Automatic congestion control
Network specific facility
Parameter compatibility information
Redirection information
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