| Category |
Specification |
| Management protocols |
H.323 v.2
SIP RFC 2543 bis |
| Codecs of voice |
G.729A (simultaneously only one port)
G.723.1 (work on 5,3 Kbit/c and 6,3 Kbit/c)
G.711 |
| DTMF |
Detection and generation of the tone DTMF (a two-tone multifrequency set) |
| Outlined DTMF |
H.245 outlined DTMF (H.323)
RFC 2833 AVT tones(SIP)
|
| Protocols of Transfer |
TCP/UDP/IP |
| Echo blocking |
One linear equalizer of an echo for each port
8 мс size of an echo
Nonlinear suppression of an echo(ERL more than 28 dB for = 300 up to 3400 Hz)
Time of convergence = 250 mc
ERLE = from 10 up to 20 dB
Detection of an echo
|
| Features of voice |
VAD (suppression of silence)
CNG (generation of noise of comfort)
Dynamic buffer of fluctuation (adaptive and with changeable configuration)
|
| Fax |
G.711 Facsimile transfer( manual and automatic switching)
Detection of facsimile tone answer
|
|
|
|
|
CISCO ATA 186
