Cancel Scheduled Calls

My outbound calling software is designed to send all calls to the gateway via a queuing mechanism, which can pass more call requests to the gateway than lines, such that the gateway will process the calls in some defined sequence.

I want to include a capability to cancel any or all calls.

Will the callRemoveHandler.jsp will cancel any calls enqueued by the gateway? What is the behavior of calls in progress? Will they cancel immediately, or do they continue ?

Yes, callRemoveHandler is the one to use to remove scheduled calls. If a call is in progress, its record is locked and cannot be removed.