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Getting Started
Feature Overview
Cisco SPA100Series Administration Guide
ATA Voice Features
The ATA can be custom provisioned within a wide range of configuration
parameters. The following sections describe the factors that contribute to voice
quality:
•
Supported Codecs
•
SIP Proxy Redundancy
•
Other ATA Voice Features
Supported Codecs
The ATA supports the codecs listed below. You can use the default settings or
configure the codec settings in the Audio Configuration section of the
Line 2 Settings (PHONE Port1 and PHONE2)
Codec
G.711 (A-law and mu-law)
G.726-32
G.729a
page.
Description
Very low complexity codecs that support
uncompressed 64 kbps digitized voice
transmissions at one through ten 5 ms voice frames
per packet. These codecs provide the highest
narrow-band voice quality and uses the most
bandwidth of any of the available codecs.
Low complexity codec that supports compressed
32 kbps digitized voice transmission at one through
ten 10 ms voice frames per packet. This codec
provides high voice quality.
ITU G.729 voice coding algorithm used to
compress digitized speech. G.729a is a reduced
complexity version of G.729 requiring about half
the processing power of G.729. The G.729 and
G.729a bit streams are compatible and
interoperable, but not identical.
1
Line 1 and
7
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