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.

Features

• FAX and Modem interface

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

• Allows caller identification

• Variants match German, UK, 600Ω & 900Ω 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