You can use QSIG or DCS with Reroute using ISDN SSE for path replacement for calls in a queue. For calls that are waiting in a queue or in vector processing, even if the call is not connected to an answering user, Communication Manager can attempt a path replacement to find the optimum path for the call.

When adjunct routing is used with a call, path replacement can be initiated when the following criteria are true:

• The inbound call is over a QSIG trunk or DCS SSE trunk.

• A route select response is received from the CTI application after the adjunct route vector command has been executed.

• The routing destination that is contained in the route select ASAI message is to an outbound QSIG trunk or out bound DCS SSE trunk.

When all three criteria are met, the trunk is seized and used for the call.