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Home Voice Line Circuits VE792 - Next Generation Carrier Chipset LE79272
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LE79272
Next Generation Carrier Chipset (NGCC) Dual Subscriber Line Interface Circuit (SLIC)
miSLIC Series – High
Performance Line Circuits
ZL880 - Enhanced Dual Channel
Wideband FXS Line Interf aces
VE880 - FXS and FXO Line
Interf aces
VE890 - Integrated FXS/FXO Line
Interf ace
VE950 - General Purpose Ringing
SLIC
LE79124
LE79128
LE79234
LE79238
LE79271
LE79272
ZL79258
LineCare Test Software
VE792 - Next Generation
Carrier Chipset
VE790 - High Performance
Programmable Chipset
VE750 - Line Card Access
Switches
VE580 - General Purpose SLICs
and Codec
VE770 - SLIC/Codecs with
(DTMF)
Integrated Fixed Companding
Codecs
Multi-Featured Programmable
Phone Codecs
Voice Line Circuits
Products
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The Le79272 Next Generation Dual Subscriber Line Interface Circuit (SLIC) device, in combination with an Le79238 SLAC device,
implements a DSL friendly, high density 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. Additionally, the NGCC has integrated self-test and line-test capabilities to resolve faults to the line or line circuit.
Detailed Block Diagram (One Channel)
Features & Benefits
Designed to minimize POTS transients, optimizing CRC performance for triple play applications
Best-in-class GR-844 equivalent testing
Fully validated test primitives and host routines
Guaranteed performance parameters
Optimized for best-in-class density
Monitor of two-wire interface voltages and currents supports:
Voice transmission
Internal ringing generation
Programmable DC feed characteristic
Current limited and independent of battery
Selectable off-hook and ground-key thresholds
Subscriber line diagnostics
Leakage and loop resistance
Line capacitance and bell capacitance
Foreign voltage sensing
Power cross and fault detection
Supports 85 Vrms internal ringing
Supports balanced and unbalanced ringing
3.3 V and battery supplies
Supports two negative and one positive battery
Dual battery operation for system power saving
Automatic battery switching
Intelligent thermal management
Compatible with inexpensive protection networks
Metering capable
12 kHz and 16 kHz
Smooth polarity reversal
Tip-open mode supports ground start signaling
Integrated test load switch
5 REN with DC offset
Features with Le79124 VCP
72 channel call aggregation
GR-844 equivalent line testing
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