What identifies an incoming fax call for automatic receipt processing?
A fax call initiated in the proper manner (generally without getting a dial tone before entering the phone number) will super-impose an 1100 Hz tone on the line repeating every 3 to 3.5 seconds. This tone is called a Calling tone and identifies the call as a FAX call. [Back To Top] • What is the difference between line sharing products which route inbound calls by using tone recognition and those which route inbound calls by ring pattern recognition? Units which use tones for inbound call routing use DTMF or CNG tones to determine the desired device destination and must “answer” the ring from the telephone company before they can hear and act on the tones. DTMF tones are like those created by a tone capable telephone. Units which route inbound calls based on “ring pattern” are generically using a process called Distinctive Ring Recognition”. These units Do Not “answer” the telephone company ring, but instead count the ring bursts within the ring interval, i.e. single, double or triple
