Method for controlling a digital telephone set and a telephone s

Details Method for controlling a digital telephone set and a telephone s Method for controlling a digital telephone set and a telephone s

1989-07-07

1990-07-03

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379237, 379387, H04M 126

Patent

active

049397745

ABSTRACT:
A method for controlling a digital telephone set coupled to an integrated services digital network, includes the following procedure. It is determined whether a telephone number of a destination terminal which is given by sequentially inputting digits forming said destination telephone number, includes an area code. Then the procedure identifies a total number of digits forming a telephone number related to said area code by searching a table in which a total number of digits forming a telephone number related to each of different area codes is defined. Then a first message requesting for setting up a call to said destination terminal is output when a number of digits forming said destination telephone number which has been input up to now becomes equal to said total number of digits fomring a telephone number related to said area code included in said destination telephone number. Alternatively, a second message is output when it is determined that said destination telephone number does not include any area code and when an interval between consecutive digits included in said destination telephone number exceeds a predetermined interval.

REFERENCES:
patent: 4613730 (1986-09-01), Fechalos et al.

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