ECHO CANCELLATION ARM7 & 9 LINE & NETWORK

The ability to cancel echoes with exceptionally long delays, coupled with a built-in awareness and handling of packet-loss makes G.168 Plus uniquely suitable for VoIP applications.

AVAILABILITY

ADT HDEC-168 is available off the shelf on the following Platforms: Other configurations are available upon request.

The Adaptive Digital Technologies G.168 Echo Canceller is a toll-quality, International Telecommunication Union G.168 compliant line EC. The EC cancels electrical echo arising from 2/4 wire hybrid interface impedance mismatches.

Adaptive’s G.168 includes two optimized variants: a short and a long echo tail variant.

The short tail variant is ideal for access devices whereas the long tail version is well suited for gateways and central office equipment.

Adaptive Digital's Echo Canceller has been Qualified As Toll-Quality by AT&T

SPECIFICATIONS

All memory requirements are in units of 16-bit words. MCPS (Million Cycles Per Second) is used rather then MIPS.

FEATURES

1. Functions are C-callable
2. Multiple channel operation
3. Parameters are user configurable
4. Non-linear processor
5. Comfort Noise Generator
6. Automatic Tail Search
7. Cancels multiple independent echo tails
8. VQE
9. Fast Convergence
10. No divergence due to doubletalk
11. Stationary signal detector improves performance in the presence of tones
12. Tone Disabler disables echo canceller during voiceband modem connections
13. Convergence monitor

FUNCTION

LEC_ADT_g168Init(…) Initializes echo canceller channel

LEC_ADT_g168Cancel(…) Executes cancellation function