Le79228 - Zarlink

Le79228 Quad Intelligent Subscriber Line Audio-processing Circuit

FEATURES „ High performance digital signal processor provides programmable control of all major line card functions — A-law/µ-law and linear codec/filter – Transmit and receive gain – Two-wire AC impedance – Transhybrid balance – Equalization — DC loop feeding – Smooth or abrupt polarity reversal — Loop supervision – Off-hook debounce circuit – Ground-key a.

Features

„ High performance digital signal processor provides programmable control of all major line card functions — A-law/µ-law and linear codec/filter
  – Transmit and receive gain
  – Two-wire AC impedance
  – Transhybrid balance
  – Equalization — DC loop feeding
  – Smooth or abrupt polarity reversal — Loop supervision
  – Off-hook debounce circuit
  – Ground-key and ring-trip filters — Internal ringing generation and integrated ring-trip detection — Adaptive hybrid balance — Line and circuit testing
  – Meets GR-909 and GR-844 test requirements — Tone generation (DTMF, FSK, random noise, and arbitrary tone) — M.