Method of producing ring-back tone in order wire

Details Method of producing ring-back tone in order wire Method of producing ring-back tone in order wire

1995-09-07

1997-01-14

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

379338, H04M 1100

Patent

active

055947859

ABSTRACT:
In an order wire as an auxiliary line for use in the installation and maintenance of communication equipment, a method of producing a ring-back tone includes of transmitting a DTMF signal on the side of the calling station, causing a call-in tone to be produced, on the side of the called station, when a specific condition is satisfied, transmitting a ring-back tone signal, on the side of the called station, containing data related to the station number of the calling station, and causing a ring-back tone to be produced, on the side of the calling station, when a specific condition is satisfied. By using the method, the ring-back tone is produced only in the calling station without the need for an exchange apparatus.

REFERENCES:
patent: 5347565 (1994-09-01), Uekama

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