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ATLAS 550 System Manual Section 2, Engineering Guidelines
61200305L1-1F © 2002 ADTRAN, Inc. 49
Voice Compression
Algorithm Voice Compression Module
G.723.1 or Netcoder (proprietary)
ADPCM-32 Module
G.711, G.726 (16K/32K),
Transparent (proprietary)
Number of channels supported Up to 32 compression channels
PCM coding µ-Law, A-Law (future)
Fax support 9600 bps
Modem Support
(ADPCM-32 Module only)
The rates shown at the right
are maximum rates. Under
certain conditions, these rates
may not be realized.
G.711, Transparent
ADPCM 32
V.34 @ 28.8 bps V.32 @ 14.4 bps
FAX @ 14.4 bps FAX @ 14.4 bps
ADPCM 16
V.21 @ 300 bps
V.22 @ 1200 bps
FAX NOT RECOMMENDED
DTMF generation and
detection
TIA 464A
Table 33. Specifications (Continued)
Application Feature Specification