Welltech Dialogic SS7 Protocols ISUP - Manual (Page 108)

Section 6 Interface to Application
Reset circuit received during a continuity test call
A reset circuit message may be received during an outgoing continuity test
call if the timer waiting for REL at the other end expires. This will cause the
ISUP module to release the continuity test call.
Figure 24. Example of a Reset Circuit Received During a Continuity Test Call
108
RLC
CCR SZE
RSC
REL
RLC RLC
ISUP
MODULE
USER
APPLICATION NETWORK
6.8.5 Malicious Call Identification (MCID) Supplementary
Service
Configuration
The ISUP module supports the malicious call identification supplementary
service when configured for following protocol variants: ITU 1992, Germany
and UK.
ITU-T Recommendation Q.731.7 specifies that timer T39 is used for this
procedure. When the per circuit group ISPX1GOP_T39 option is set, this will
cause timer T39 to be initiated, to await for an IRS message after an IDR
message has been sent.
If timer T39 expires (when no IRS message is received from the previous
exchange), the ISUP module will generate an IRS message containing the
MCID response indicator with the following default values to the user
application and the call will be allowed to continue.
MCID response indicators
Bit Field Value Meaning
A MCID response indicator 0 MCID not provided
B Hold provided indicator 0 Holding not provided