描述 Description

The Mitel MH88510/11 Subscriber Line Interface Circuit provides a complete interface between the telephone line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88510/11 include bidirectional differential to single ended conversion in the speech path, line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film hybrid which incorporates various technologies for optimum circuit board and very high reliability.

特性 Features

? High Gain version MH88511

? Compatible with popular MH88500

? Operates with a wide range of battery voltages

? Constant current battery feed

? Dry line compatible

? Overvoltage and short circuit protection

? Ringing Feed

? Off-hook detection and LED indicator drive

? Dial pulse detection

? Ring trip filter with auto ring trip

? Relay driver

? Transformerless 2-2 wire conversion

? Low power consumption

? Mute of incoming audio

? Few external components

Applications

? Line Interface for:

? PABX

? Intercoms

? Key Systems