Disengagement originator

In telecommunication, disengagement originator is the user or functional unit that initiates a disengagement attempt.

Note 1: A disengagement originator may be the originating user, the destination user, or the communications system.

Note 2: The communications system may deliberately originate the disengagement because of preemption or inadvertently because of system malfunction.

Source: from Federal Standard 1037C