Test interface adapter emulating on test trunk interface for non

Details Test interface adapter emulating on test trunk interface for non Test interface adapter emulating on test trunk interface for non

1995-06-02

1997-04-15

Chin, Wellington

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of trunk or long line

379 10, 379 11, 379 12, 379 16, 379 17, H04M 124, H04M 308

Patent

active

056217820

ABSTRACT:
A test interface adapter allows a line-conditioning or test device, such as a direct access test unit (DATU), that is normally interfaced with a standard central office switch via a no-test trunk, to be coupled to and communicate with the respective ports of a test interface of a non-standard central office switch that is not equipped with a no test trunk, so that conditioning and/or testing of subscriber telephone lines served by such non-standard central office switch may be carried out. When so installed, the interface adapter of the present invention is operative to map signals at first interface ports, to which the non-standard central office switch is connected, to second interface ports to which the line conditioning/test device (e.g DATU) is connected, and vice versa. The port lead and signal mapping functionality of the interface allows the accessing device to communicate with the respective ports of what would otherwise be a non-compatible test interface of the central office switch, so that it may controllably condition and/or test line circuits of the `NTT-less` central office switch.

REFERENCES:
patent: 4314110 (1982-02-01), Breidenstein
patent: 4430530 (1984-02-01), Kandell
patent: 4558188 (1985-12-01), Stuparits
patent: 4581493 (1986-04-01), Gazzo
patent: 4839917 (1989-06-01), Oliver
patent: 5103473 (1992-04-01), Sullins
patent: 5166925 (1992-11-01), Ward

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