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Available voice codecs
655
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
G.711 A-law
64
10
96
Uncompressed, best voice qual-
ity, European audio-digitizing
G.711 U-law
64
10
96
Uncompressed, best voice qual-
ity, American audio-digitizing
G.723.1
6.3
30
17
Good voice quality at lowest
bandwidth, like analog phone,
acceptable delay
G.729/
G.729a
8
10
40
Best relationship between voice
quality and used bandwidth,
low delay
Transparent
64
10
96
Transparent ISDN data, no
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.
G.727
16, 24, 32
20
32, 40, 48
Embedded ADPCM. See also
G.726.
T.38
Variable
This is a fax codec, not a
voice codec.
Содержание SmartNode Series
Страница 250: ...RIP configuration task list 250 SmartWare Software Configuration Guide 23 RIP configuration rip enabled ...
Страница 635: ...635 Appendix A Terms and definitions Chapter contents Introduction 636 SmartWare architecture terms and definitions 636 ...
Страница 641: ...641 Appendix B Mode summary Chapter contents Introduction 642 ...
Страница 648: ...648 Appendix D Internetworking terms acronyms Chapter contents Abbreviations 649 ...
Страница 653: ...653 Appendix E Used IP ports available voice codecs Chapter contents Used IP ports 654 Available voice codecs 655 ...