Circuit for translating telephone numbers

Details Circuit for translating telephone numbers Circuit for translating telephone numbers

1986-02-11

1988-05-31

Dwyer, James L.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379216, H04Q 347

Patent

active

047486619

ABSTRACT:
A circuit for translating predetermined telephone numbers to new digit sequences, referred to as the translated number, is disclosed. Each of the original telephone numbers consists of a first sequence of digits, referred to as the switch sequence, followed by a second sequence of digits, referred to as the recognition sequence. Additional digits may be present after the recognition sequence. The corresponding translated telephone number consists of the switch sequence of the original telephone number followed by a second sequence of digits, referred to as the end sequence. Telephone numbers which do not being with one of the specified switch sequences are allowed to pass through the present invention unchanged without the introduction of a delay.

REFERENCES:
patent: 3573389 (1971-04-01), Greenstein et al.
patent: 3860762 (1975-01-01), Klaiber et al.
patent: 3873781 (1975-03-01), Nissim
patent: 4171469 (1979-10-01), Brooks
patent: 4177358 (1979-12-01), Mason
patent: 4215246 (1980-07-01), Sawyer
patent: 4234764 (1980-11-01), Beebe
patent: 4314108 (1982-02-01), Sharvit
patent: 4332985 (1982-06-01), Samuel
patent: 4460806 (1984-07-01), Canniff et al.
patent: 4578540 (1986-03-01), Borg et al.
patent: 4608460 (1986-08-01), Carter et al.

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