Patton electronic SmartNode 4110 Series ユーザーズマニュアル
Available voice codecs
664
SmartWare Software Configuration Guide
E • Used IP ports & available voice codecs
Available voice codecs
Protocol
Codec
Net Band-
width per
Call (kbps)
Min.
Compression
Delay (ms)
Used Band-
width per
Call (kbps,
incl. IP
header)
Usage
H.323
& SIP
& SIP
G.711 A-law
64
10
96
Uncompressed, best voice qual-
ity, European audio-digitizing
ity, European audio-digitizing
G.711 U-law
64
10
96
Uncompressed, best voice qual-
ity, American audio-digitizing
ity, American audio-digitizing
G.723.1
6.3
30
17
Good voice quality at lowest
bandwidth, like analog phone,
acceptable delay
bandwidth, like analog phone,
acceptable delay
G.729/
G.729a
G.729a
8
10
40
Best relationship between voice
quality and used bandwidth,
low delay
quality and used bandwidth,
low delay
Transparent
64
10
96
Transparent ISDN data, no
echo cancellation
echo cancellation
G.726
16, 24, 32, 40
20
32, 40, 48, 56 The G.726 is an ADPCM based
codec, with small memory foot-
print but fairly high CPU time
requirements. Also available in
Cisco compatible mode.
print but fairly high CPU time
requirements. Also available in
Cisco compatible mode.
G.727
16, 24, 32
20
32, 40, 48
Embedded ADPCM. See also
G.726.
G.726.
T.38
Variable
This is a fax codec, not a
voice codec.
voice codec.