Description
The Mitel MH88632B Central Office Interface Circuit provides a complete analog and signalling link between audio switching equipment and a subscriber line. The device is available in a single in line package for high packing densities or in a 90˚ package for reduced card clearance.
The device is fabricated using thick film hybrid technology for optimum circuit design and very high reliability.

Features
• Supports Loop Start and Ground Start protocols
• 2-4 Wire conversion
• Programmable Input Impedance, Network Balance Impedance and gains
• Three relay drivers
• Line state detection outputs
• 15mA operation allowing long line length capability
• On-hook reception for Caller Line Identification
• Meets FCC Part 68 Leakage Current Requirements

Applications
Interface to Central Office telephone line for
• PBX
• Key Telephone System
• Terminal Equipment
• Digital Loop Carrier
• Wireless Local Loop