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GRP260x Administration Guide
Version 1.0.3.42
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In audio
: DTMF is combined in the audio signal (not very reliable
with low-bit-rate codecs).
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RFC2833
sends DTMF with RTP packet. Users can check the RTP
packet to see the DTMFs sent as well as the number pressed.
•
SIP INFO
uses SIP INFO to carry DTMF.
Default setting is “RFC2833”.
DTMF Payload Type
Configures the payload type for DTMF using RFC2833. Cannot be the same
as iLBC or OPUS payload type.
Enable Audio RED with FEC
If set to "Yes", FEC will be enabled for audio call.
The default setting is "Yes".
Audio FEC Payload Type
Configures audio FEC payload type. The valid range is from 96 to 126.
The default value is 121.
Audio RED Payload Type
Configures audio RED payload type. The valid range is from 96 to 126.
The default value is 124.
Silence Suppression
If set to "Yes", when silence is detected, a small quantity of VAD packets
(instead of audio packets) will be sent during the period of no talking. For
codec G.723 and G.729 only. Default setting is “No”
Jitter Buffer Type
Selects either Fixed or Adaptive for jitter buffer type, based on network
conditions. The default setting is “Adaptive”.
Jitter Buffer Length
Selects jitter buffer length from 100ms to 800ms, based on network
conditions. The default setting is “300ms”.
Voice Frames Per TX
Configures the number of voice frames transmitted per packet. It is
recommended that the IS limit value of Ethernet packet is 1500 bytes or 120
kbps. When configuring this, it should be noted that the "ptime" value for the
SDP will change with different configurations here. This value is related to
the codec used in the codec table or negotiate the payload type during the
actual call. For example, if set to 2 and the first code is G.729, G.711 or
G.726, the "ptime" value in the SDP datagram of the INVITE request is 20
ms. If the "Voice Frame/TX" setting exceeds the maximum allowed value,
the phone will use and save the maximum allowed value for the selected first
codec. It is recommended to use the default setting provided, and incorrect
setting may affect voice quality.
The default setting is 2.
G.723 Rate
Selects encoding rate for G723 codec.
RTP Settings
