SS7-ISUP, DSS1 Release Complete Message

SS7-ISUP

A message sent in either direction in response to the receipt of a release message, or if appropriate to a reset circuit message, when the circuit concerned has been brought into the idle condition.
ParameterTypeLength (octets)
Message typeF1
Cause indicatorsO5-6
End of optional parametersO1

DSS1 (3.1.10/Q.931)

This message is sent by the user or the network to indicate that the equipment sending the message has released the channel (if any) and call reference, the channel is available for reuse, and the receiving equipment shall release the call reference.

Information elementDirectionTypeLengthNote
Protocol discriminatorBothM1
Call referenceBothM2-*
Message typeBothM1
Causen->uO2-32
Displayn->uO The minimum length is 2 octets; the maximum length is network dependent and is either 34 or 82 octets.
Signaln->uO2-3
NOTES 1 This message has local significance; however, it may carry information of global significance when used as the first call clearing message. 2 Mandatory in the first call clearing message, including when the RELEASE message is sent as a result of an error handling condition. 3 Included if the network provides information that can be presented to the user. 4 The minimum length is 2 octets; the maximum length is network dependent and is either 34 or 82 octets. 5 Included if the network optionally provides additional information describing tones.