Continuity Check Request with CRM

Continuity Check on this Circuit

Note that for Continuity Check, the order (SETUP_IND, CONNECT_LOOP_IND, DISABLE_ECHO_IND) and (CONTINUITY_REPORT_IND, SETUP_FAILURE_IND, REMOVE_LOOP_IND, and ENABLE_ECHO_IND) is not deterministic since there are two separate state machines involved.

For Continuity Recheck, the order is deterministic since it is handled by one state machine.

Successful Continuity Check

Figure 18-17 Continuity Check with CRM - Incoming Side - Success

Failed Continuity Check and Recheck Procedure

Figure 18-18 Continuity Check with CRM - Incoming Side - Failure

Continuity Check on the Previous Circuit
- Not Required on this Circuit

Even if the continuity check is required on the previous circuit, HP OpenCall SS7 ISUP handles the request as if no continuity was required.

Figure 18-19 Continuity Check with CRM - Not Required / Required on Previous