Acoustic Echo Cancellation (Aec); Audio Codecs - Polycom SoundPoint IP 301 Administrator's Manual

Administrator Guide - SoundPoint
Local

3.3.7 Acoustic Echo Cancellation (AEC)

The phone employs advanced acoustic echo cancellation for hands-free operation.
Both linear and non-linear techniques are employed to aggressively reduce echo yet
provide for natural full-duplex communication patterns.

3.3.8 Audio Codecs

The following table summarizes the phone's audio codec support:
Algorithm
G.711µ-law
G.711a-law
G.729AB
SID
RFC 2833
Central
(boot
server)
® ®
IP / SoundStation IP
Web Server None.
(if enabled)
Local Phone User None.
Interface
MIME Type Ref.
PMCU RFC
1890
PCMA RFC
1890
G729 RFC
1890
CN RFC
3389
phone-event RFC
2833
Configuration file: Specify codec priority, preferred payload sizes, and jitter
sip.cfg buffer tuning parameters.
For more information, see
•
•
Copyright © 2005 Polycom, Inc.
Sample
Bit Rate Rate
64 Kbps 8 Ksps
64 Kbps 8 Ksps
8 Kbps 8 Ksps
N/A N/A
N/A N/A
4.6.1.8.1.1 Codec Preferences <preferences/> on
page 94, and
4.6.1.8.1.2 Codec Profiles <profiles/> on page 95.
Features
Effective
audio band-
Frame Size width
10ms - 80ms 3.5KHz
10ms - 80ms 3.5KHz
10ms - 80ms 3.5KHz
N/A N/A
N/A N/A
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