1612-04: PBX/Centrex Flash Timer
Use this timer to set the Flash interval. When a user flashes a line (manually or in a Speed Dial
number), the system opens the line circuit for this interval. For accurate flash function, be sure to set
this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short,
the telco may not always register the flash. If too long, inadvertent disconnects may occur.