Resetting circuit groups

This topic describes the circuit group reset process when performed by the application and the far exchange.

Application initiated circuit reset

The application requests the reset of a circuit group by invoking TUPStatusReq with the event type of TUPCIRGRPRESREQ. In the call to TUPStatusReq, the application must specify the starting circuit number and the range of circuits within a group. The application can consider the circuit group reset upon issuing this request. The following illustration shows how the application initiates a group rest request:

 

Far exchange initiated circuit reset

If the far exchange initiates the reset of the circuit group, the application receives a status indication (EVTTUPSTAIND) with the event type of TUPCIRGRPRESREQ from the TUP layer for the circuit group. The application can consider these circuits reset upon receiving this indication. The TUP task acknowledges the group reset request by sending a group reset acknowledgment message (GRA). The following illustration shows the process by which a far exchange-initiated group reset request is conducted: