The originating marker then passed the trunk call completion requirements (type of pulsing, resistance of the trunk, etc.) and the called party's details to the sender and released.
The information processing, if only to identify the problem and the location of the patient, has always been a logical part of the process of call completion.
A user could call 888-411-1111 to request directory assistance, directions, traffic information, movie times, call completion, dinner reservation assistance and other services.
With per-second billing requiring faster processing coupled with extremely poor call completion rates on account of overloaded networks or ageing infrastructure, this comes as no surprise.