MH88632 - Central Office Interface Circuit Preliminary Information

The Mitel MH88632 Central Office Trunk Interface circuit provides a complete audio and signalling link between audio switching equipment and a central office.

• Loop start and ground start capabilities Transformerless 2-4 wire conversion Programmable transmit/receive gain with 0dB defaults Programmable input impedance with 600 Ω and 900Ω defaults Programmable network balance with 600 Ω, 900Ω, and AT&T compromise default One loop start & two ground start relay drivers Line state detection outputs Forward loop, reverse loop, ring ground, tip ground, ringing.