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Application Note
MSAN-156
Implementation Details for the MH88617 SLIC
AN5028 ISSUE 2 September 1998
Contents
1. Overview 2. Loop Current 2.1 Programming 2.2 Power Down 2.3 Overcurrent Fault Protection 3. Ringing 3.1 Supply voltages 3.2 Square wave ringing 4. Gain, Input and Balance Impedances 4.1 Programming 4.2 VX and VR signals 5. Metering Injection 6. Relay Drive 7. Protection 8. Power supply considerations
1.0 Overview
The MH88617 is a highly featured Subscriber Line Interface Circuit (SLIC). It provides a total analogue transmission and signalling link between a switching system and a subscriber loop. Typical applications include PABX and Key Telephone Systems, Analog Terminal Adaptors, PairGain, Fibre in the Loop and Wireless Local Loop systems.