How The SR Works

How The SR Cal1 Processor Works

The SR Call Processor counts the number of bursts in the ring pattern of the telephone number called. It then directs the call to one of the numbered device ports at the rear of the unit.


The device ports are output jacks that connect your phone devices (phones, MODEMs, FAX, answering and dictation machines) to the SR Call Processor.


When you have attached the phone devices you wish to use, the SR Call Processor routes each different ring pattern (i.e. telephone number) to a specific phone device without ringing other phones on the same line.



Ring Pattern


Devices Used (examples)

Original Number

Device 1


Second Number

Device 2


Third Number

Device 3

Computer Modem
(SR3 only)