Telephone line access apparatus

Details Telephone line access apparatus Telephone line access apparatus

1985-11-19

1988-11-01

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

379332, H04J 114

Patent

active

047824808

ABSTRACT:
A telephone line access apparatus includes a first stage for providing high voltage protection and a second stage filter in series with the first stage. The first and second stages are incorporated within a housing that is adapted to plug into an existing main distribution frame of a telephone central office.

REFERENCES:
patent: 2009438 (1935-07-01), Dudley
patent: 3562792 (1968-06-01), Berlincourt et al.
patent: 4161008 (1979-07-01), Zimmermann et al.
patent: 4215325 (1980-07-01), Sansone
patent: 4342969 (1982-08-01), Myers et al.
patent: 4353043 (1982-10-01), Gunton
patent: 4388718 (1983-06-01), Gerke et al.
patent: 4440980 (1984-03-01), Bakker
patent: 4575699 (1986-03-01), Lockwood
patent: 4575840 (1986-03-01), Hargrave et al.

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