1
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Enter the system view.
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system-view
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2
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Enter the voice view.
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voice
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3
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Enter the DSP view.
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dsp-attribute
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4
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Enable echo cancellation on a DSP channel.
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echo enable
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By default, echo cancellation is disabled on the DSP channel.
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5
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Enable the packet loss concealment (PLC) function on a DSP channel.
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plc enable
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By default, the PLC function is disabled.
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6
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Enable silence compression on a DSP channel.
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silence enable
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By default, silence compression is disabled on the DSP channel.
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7
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Set fax parameters.
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- Run:
fax redundancy-t4 redundancy-t4-value
The T.4 redundancy parameter value of the T.38 fax is set.
By default, the T.4 redundancy parameter value of the T.38 fax is 3.
- Run:
fax redundancy-t30 redundancy-t30–value
The T.30 redundancy parameter value of the T.38 fax is set.
By default, the T.30 redundancy parameter value of the T.38 fax is 3.
- Run:
fax training-mode { e2e | local }
The fax training mode is set.
By default, end-to-end training is used.
- Run:
fax training-rate { v17 | v29 | v27 }
The maximum fax training rate is set.
By default, the maximum fax training rate is V17.
- Run:
fax v8negotiate enable
V8 negotiation is enabled.
By default, V8 negotiation is disabled.
- Run:
fax ecm enable
T.38 ECM is enabled.
By default, T.38 ECM is enabled.
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8
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Set jitter buffer parameters.
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- Run:
jitter-buffer adapt-jb-threshold adapt-jb-threshold
The alarm threshold of the dynamic jitter buffer is set.
By default, the alarm threshold of the dynamic jitter buffer of the DSP channel is 150 ms.
- Run:
jitter-buffer init-adapt-jb init-adapt-jb-value
The initial value of the dynamic jitter buffer is set.
By default, the initial value of the dynamic jitter buffer of the DSP channel is 2 ms.
- Run:
jitter-buffer init-fixed-jb normal-fixed-jb-value
The initial value of the static jitter buffer is set.
By default, the initial value of the static jitter buffer of the DSP channel is 60 ms.
- Run:
jitter-buffer max-adapt-jb max-adapt-jb-value
The maximum value of the dynamic jitter buffer is set.
By default, the maximum value of the dynamic jitter buffer of the DSP channel is 135 ms.
- Run:
jitter-buffer min-adapt-jb min-adapt-jb-value
The minimum value of the dynamic jitter buffer is set.
By default, the minimum value of the dynamic jitter buffer of the DSP channel is 2 ms.
- Run:
jitter-buffer max-fixed-jb max-fixed-jb-value
The maximum value of the static jitter buffer is set.
By default, the maximum value of the static jitter buffer of the DSP channel is 135 ms.
- Run:
jitter-buffer min-fixed-jb min-fixed-jb-value
The minimum value of the static jitter buffer is set.
By default, the minimum value of the static jitter buffer of the DSP channel is 2 ms.
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9
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Set payload type parameters.
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- Run:
payload-type clear-mode clearmode-value
The RTP payload type value of a DSP channel is set.
By default, the RTP payload type value of the DSP channel is 100.
- Run:
payload-type g726-16k g726-16k-value
The G.726-16k payload type value of a DSP channel is set.
By default, the G.726-16k payload type value of the DSP channel is 103.
- Run:
payload-type g726-24k g726-24k-value
The G.726-24k payload type value of a DSP channel is set.
By default, the G.726-24k payload type value of the DSP channel is 104.
- Run:
payload-type
g726-32k g726-32k-value
The G.726-32k payload type value of a DSP channel is set.
By default, the G.726-32k payload type value of the DSP channel is 101.
- Run:
payload-type g726-40k g726-40k-value
The G.726-40k payload type value of a DSP channel is set.
By default, the G.726-40k payload type value of the DSP channel is 105.
- Run:
payload-type nte nte-value
The NTE payload type value of a DSP channel is set.
By default, the NTE payload type value of the DSP channel is 97.
- Run:
payload-type redundancy redundancy-value
The redundancy payload type value of a DSP channel is set.
By default, the redundancy payload type value of the DSP channel is 96.
- Run:
payload-type
vbd vbd-value
The VBD payload type value of a DSP channel is set.
By default, the VBD payload type value of the DSP channel is 102.
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10
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Set RTCP parameters.
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- Run:
rtcp rtcp-interval rtcp-interval
The interval at which a DSP channel sends RTCP packets is set.
By default, the interval at which the DSP channel sends RTCP packets is 5000 ms.
- Run:
rtcp rtcpxr enable
The RTP Control Protocol Extended Reports (RTCP XR) function is enabled.
By default, the RTCP XR function is disabled.
- Run:
rtcp sev-degradethreshold sev-degradethresholdval
The threshold for the number of severe degrade seconds is set.
By default, the threshold for the number of severe degrade seconds is 400.
- Run:
rtcp vqm enable
The Voice Quality Monitor (VQM) function is enabled.
By default, the VQM function is disabled.
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11
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Set DSP resource parameters.
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- Run:
resource-threshold mode { priority | normal }
The DSP resource control mode is configured.
By default, the DSP resource control mode is normal.
- Run:
resource-threshold { threshold1 threshold1 | threshold2 threshold2 | threshold3 threshold3 }
The resource threshold in hierarchical control mode is set.
The default resource threshold in hierarchical control mode is 100.
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The resource threshold in hierarchical control mode can be set only when the DSP resource control mode is priority.
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12
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Set the mode in which the DSP adjusts the volume of DTMF tones.
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Run: nte2833-volume mode mode-value. The mode in which the DSP adjusts the volume of DTMF tones is set.
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By default, the adjustment mode is disabled.
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13
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Set a value by which the DSP adjusts the volume of DTMF tones in fixed mode.
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Run: nte2833-volume deviation deviation-value. A value that indicates how much the DSP adjusts the volume of DTMF tones in fixed mode is set.
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The default value is 20, indicating that the DSP adjusts the volume of DTMF tones by 0 dBm.
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14
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Configure a DSP channel.
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- Run:
quit
The DSP attribute view is closed.
- Run:
dsp slot/dsp-index
The DSP resource management view is displayed.
- Run:
loop-back loopback-type channel
The loopback function is configured on a DSP channel.
By default, the loopback function is not configured on a DSP channel.
- Run:
prohibit channel [ count ]
DSP channels are prohibited.
By default, no DSP channel is prohibited.
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