HYBREX G1 8-24, Manual

Page: 41 / 200

41
CO Break Disconnect Timer
Description
CO Break Disconnect Timer allows the system to drop calls on hold that have been abandoned as well as
calls in process by the Voice Service Unit. It will also drop CO lines where outside parties abandon any
external Auto Attendant or Voice Mail System that has been classified as Voice Mail port by system
database programming.
Conditions
CO Break Disconnect Timer should only be activated on systems where the telephone lines are actually
receiving disconnect supervision or “open loop” conditions from the telephone company when calls are
disconnected.
CO Break Disconnect Timer will not disconnect normal stations when an outside caller hangs up.
Programming
Mode 05-09-03 Controls the activation and sensitivity of the timer. For most US Electronic Central
Offices, a setting of 4 or 5 should be adequate. If abandoned calls are not promptly disconnected, this
timer should be increased. If calls are getting cut off for no apparent reason, this timer should be reduced
or disabled. Valid settings are:
CO Break Disconnect Timer Mode 05-09-03 0=Disabled 1=80 milliseconds
2=160 milliseconds 3=240 milliseconds 4=320 milliseconds 5=400 milliseconds
6=480 milliseconds 7=560 milliseconds 8=640 milliseconds 9=720 milliseconds
Operation
When enabled, a call on hold that is abandoned by the outside caller should cause the G system to
disconnect the outside line. Abandoned unsupervised conference, DISA calls, and Voice Mail calls will
also be disconnected when a disconnect indication is received from the telephone company central office.
Note: Many telephone company Central offices do not provide immediate disconnect supervision when
calls are abandoned. In many cases this may take as long as 10-20 seconds after the outside
caller has hung up. Not all telephone company Central Offices supply disconnect supervision.