1613-02: Far End Disconnect Timer
Use this option to set the loop disconnect interval for outside calls. If the system detects a loop
current interruption longer than this interval it assumes the telco has disconnected the line. It then
returns the line to idle. Set this interval for compatibility with the connected telco or PBX/Centrex. If
you set this interval too short, momentary loop current interruptions from the telco could cause the system
to improperly disconnect a call. If you set this interval too long, the system could miss the telco's
disconnect signal and stay connected to a line on which a call is no longer present.