The proper delay of a jitter buffer is about 30 ms. If the delay is too short, IP voice packetsĬannot arrive within the specified time range and the voice jitter So the forwarding delay must be specified. By doing this, the jitter of the IP phoneĭoes not forward each voice packet immediately after receiving it, The jitter bufferįorwards each packet at intervals only after a certain number of IP A received IP packet is first received by the bufferīut not transmitted to the called end immediately. The jitter buffer is installed at the receive end ofĪn IP phone. The voice quality using Packet Loss Concealment (PLC). The jitter buffer removes the delay and improves Link delay on the VoIP network cause voice jitter and make the call
#Dsp quattro no such volume serial
The transmission delay, processing delay, and serial The mode in which the DSP adjusts the volume of DTMF tones Positive twist value, range 0~100, unit 0.1db Negative twist value, range 0~100, unit 0.1db enable: Echo cancellation is enabled on theĬoncealment (PLC) function is enabled on the DSP channel.disable: Echo cancellation is disabled on the.The value can be 0 or in the range of 500 The value ranges from 96 to 127.ĭSP channel. The value ranges from 0 to 150,ĭynamic jitter buffer of the DSP channel. V27: negotiation using V.27 fax and a maximum.V29: negotiation using V.29 fax and a maximum.V17: negotiation using V.17 fax and a maximum.Takes effect only when the T.38 fax is used. To packetize RTP packets, in milliseconds. Table 15-16 Description of the display voice dsp-attribute Workmode Threshold1 Threshold2 Threshold3 RTCP package send interval time(ms) : 5000ĭTMF negative twist value : 10, unit 0.1dbĭTMF positive twist value : 40, unit 0.1dbĭSP 2833 event volume adjustment mode : disableĭSP 2833 event volume adjustment devia : 0 dBm
T4 redundancy parameter value of T38 fax : 3ĭSP adapted jitter buffer threshold(ms) : 150 T30 redundancy parameter value of T38 fax : 3 # Display the configuration of DSP parameters. The following figure lists the maximum number of calls supported by the DSP chip in each codec state and packetization duration. # indicates that the DSP channel is in prohibited state. * indicates that the DSP channel works in PCM loopback state. X indicates that the DSP channel is in faulty state, and a call cannot be connected through the DSP indicates that the DSP channel works in IP loopback state. W indicates that the the DSP channel is in wastage state, for example, G.729 codec may consume extra DSP channels. $ indicates that the DSP channel works in G.711 codec state.Ī indicates that the DSP channel works in non-G.711 codec state, such as the G.729 and G.723 codec state.
Table 15-12 Description of the display voice dsp state command outputĠ indicates that the DSP channel is in idle state.
0 kommentar(er)
