3Com MSR 50 Compression, Related command line and vad-on, View POTS/VoIP/VoFR entity view, 2559

2559

generated, the toneless intervals will make both parties in conversation feel uncomfortable.

Related command: line and vad-on.

Example # Disable comfortable noise function on subscriber line 1/0.

<Sysname> system-view [Sysname] voice-setup [Sysname-voice] subscriber-line 1/0 [Sysname-voice-line1/0] undo cng-on

compression

Syntax compression { 1st-level 2nd-level 3rd-level 4th-level } { g711alaw g711ulaw g723r53 g723r63 g726r16 g726r24 g726r32 g726r40 g729a g729r8 }

undo compression { 1st-level 2nd-level 3rd-level 4th-level }

View POTS/VoIP/VoFR entity view

Parameter 1st-level: Specifies a codec with the first priority. 2nd-level: Specifies a codec with the second priority. 3rd-level: Specifies a codec with the third priority.

4th-level: Specifies a codec with the fourth priority (namely, the lowest priority).

g711alaw: G.711 A-law codec (defining the pulse code modulation technology), requiring a bandwidth of 64 kbps, usually adopted in Europe.

g711ulaw: G.711μ-law codec, requiring a bandwidth of 64 kbps, usually adopted in North America and Japan.

g723r53: G.723.1 Annex A codec, requiring a bandwidth of 5.3 kbps.

g723r63: G.723.1 Annex A codec, requiring a bandwidth of 6.3 kbps.

g726r16: G.726 Annex A codec. It uses the adaptive differential pulse code modulation (ADPCM) technology, requiring a bandwidth of 16 kbps.

g726r24: G.726 Annex A codec. It uses ADPCM, requiring a bandwidth of 24 kbps. The support for the g726r24 keyword varies with devices.

g726r32: G.726 Annex A codec. It uses ADPCM, requiring a bandwidth of 32 kbps. The support for the g726r32 keyword varies with devices.

g726r40: G.726 Annex A codec. It uses ADPCM, requiring a bandwidth of 40 kbps. The support for the g726r40 keyword varies with devices.

g729a: G.729 Annex A codec (a simplified version of G.729), requiring a bandwidth of 8 kbps.