描述 Description

The Mitel MH88400 Line Interface Circuit provides a complete audio and signalling link between audio equipment and central office. The functions provided by the MH88400 include 2-4 Wire conversion, loop seizure, external monitor phone switch hook status and ringing voltage and loop current detection. The device is fabricated as a thick film hybrid which incorporates various technologies for optimum circuit design, high voltage isolation and very high reliability.

特性 Features

? FAX and Modem interface

? Suitable for V.29 FAX & V.22 bis Data

? Allows caller identification

? Variants match German, UK, 600? & 900? network impedances

? Isolation circuitry conforms to international PTT requirements

? Transformerless 2-4 Wire conversion

? Loop start operation

? Pulse and DTMF operation

? Accommodates external monitor phone

? Line state detection outputs:

-loop current/ringing outputs

-monitor phone switch hook

? Single +5V operation

Applications

Interface to Central Office for:

? DAA

? Modem

? FAX

? Answering Machine

? Terminal Equipment