Description
The Mitel MH88634K Central Office Trunk Interface circuit provides a complete audio and signalling link between audio switching equipment and a central office. The functions provided by the MH88634K include 2-4 Wire conversion, 600 Ohm input impedance and network balance. The device is fabricated as a thick film hybrid incorporating various technologies for optimum circuit design and very high reliability.

Features
• Loop Start Trunk Interface
• 600 Ohm input impedance
• Line state detection outputs:
    - forward loop
    - reverse loop
    - ringing voltage
    - service out
• Transformerless 2W to 4W conversion
• One loop start relay driver
• +/- 5V operation

Applications
Interface to Central Office for:
• PABX
• Key Telephone Systems
• Channel Bank
• Voice Mail
• Terminal Equipment
• Digital Loop Carrier
• Optical Multiplexer