Direct access arrangement device

Details Direct access arrangement device Direct access arrangement device

2005-12-29

2010-11-16

Briney, III, Walter F (Department: 2614)

Telephonic communications

Line equalization or impedance matching

C379S387010

Reexamination Certificate

active

07835516

ABSTRACT:
A direct access arrangement (DAA) device configured to interface a security alarm modem with a phone network. The DAA device comprises a receive optical isolator (OI) module and first and second transmit OI modules. The transmit OI modules are joined in parallel with one another to receive signals from the security alarm modem and convey the signals to the phone network. The receive IO and first and second transmit OI modules may each be interconnected to at least partially cancel distortion generated by the first and second transmit IO modules.

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