Nortel DMS-250 - NCAUUI TSC Clearing

NCAUUI 14-11
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Figure 14-5
User Congestion and Network Flow Control Interaction
Originating PBX
MCI DMS–250
Terminating PBX
SETUP (NCAUUI Request)
CONNect
User Information
User Information
SETUP (NCAUUI Request)
CONNect
User Information
CONNect ACKnowledge
CONGestion Control
(“RNR” w/cause value of 42)
CONGestion Control
CONGestion Control
(“RNR” w/cause value of 42)
CONNect ACKnowledge
User Information
CONGestion Control
(“RR” w/ cause value of 42)
User Information
User Information
User Information
User Information
User Information
User Information
User Information
User Information
(“RR” w/ cause value of 42)
Network
Congestion
is cleared
Network
Congestion
is started
NCAUUI TSC Clearing
User Clearing
Either of the end users utilizes a Q.931 RELease or RELease COMPlete
message to clear the NCAUUI connection. The user that receives the Q.931