Data transmission over the public switched network

Details Data transmission over the public switched network Data transmission over the public switched network

1987-12-08

1989-01-03

Lev, Robert

Telephonic communications

Telephone line or system combined with diverse electrical...

Credit authorization

235381, H04M 157

Patent

active

047962925

ABSTRACT:
A credit card authorization network which, among other advantages, allows telephone charges to be reduced. A credit card company, operating as an Interexchange Customer, provides trunk-protocol executing modems at a Feature Group B access facility. The modems are interfaced to the trunks, on a T1 digital link, by adapting FXS channel bank cards with a ground start option to translate between E&M signaling and ground start loop signaling.

REFERENCES:
patent: 4567359 (1986-01-01), Lockwood
patent: 4715061 (1987-12-01), Norwich
patent: 4750199 (1988-06-01), Norwich
patent: 4750201 (1988-06-01), Hodgson et al.
patent: 4756020 (1988-07-01), Fodale
patent: 4763191 (1988-08-01), Gordon et al.

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