2. CPX-1000 Voice Services Platform Description

1000-A2-GN22-00

 

 

Echo

Cancellation and

Compression

Module (ECAC)

The ECAC module can be used with the Octal T1 or STS-1 module to provides compression from zero to 100% of calls on the CPX. With compression, maximum capacity is 1,024 calls. When ADPCM compression is used, samples are packed two per byte (32 kbps) or four per byte (16 kbps).

“Voice Compression” refers to the industry standard compression algorithm of voice data passed between the CPX and an IAD. Voice data compression decreases the bandwidth used on the most narrow pipe — the local loop — enabling additional voice calls and/or increased performance in data communications.

ECAC Requirements

ADPCM32 and ADPCM16 support

Able to query compression capabilities

In a T1 setup, the last two slots available (usually 15 & 16)

￿In an STS-1 setup, the first two slots available (usually 1 & 3)

STATUS

0152

Figure 2–18. Echo Cancellation And Compression Card

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February 2003

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Paradyne CPX-1000 manual Echo Cancellation Compression Module Ecac, Echo Cancellation And Compression Card