LE792388TVC

The Le79238 Next Generation Octal Subscriber Line Audio processing Circuit (SLAC) device, in combination with the Le79271 SLIC device, implements a DSL friendly, high density eight-channel universal telephone line interface. This enables the design of a low cost, high performance, fully software programmable line interface with worldwide applicability. All AC, DC, and signaling parameters are programmable via a microprocessor interface. The Le79238 has an integrated test tool box and uses VCP test primitives and host routine capabilities to resolve faults to the line or line circuit.

• Optimized for Next Generation Broadband xDSL and triple play applications
• Eliminates transients that could cause CRC errors
• Best-in-class GR-844 equivalent testing capability
• Ideal for high density, medium and large line count applications
• API-compatible with VE790 Series designs
• 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
  • Loop supervision
  • Internal ringing generation and integrated ring-trip detection
  • Metering generation at 12 kHz and 16 kHz
  • Envelope shaping and level control
• Enhanced line control and line-test support
  • DTMF and Modem Tone Detection
  • GR-909 and GR-844 Line and circuit testing capability
  • Tone generation (DTMF, FSK, and arbitrary tone)