Default setting is “RFC2833”.
DTMF Delay
Configures the delay between sending DTMF during MPK/VPK use (in milliseconds).
Default is “250” ms.
DTMF Payload Type
Configures the payload type for DTMF using RFC2833. Cannot be the same as iLBC or
OPUS payload type.
Silence Suppression
Controls the silence suppression/VAD feature of the audio codecs except forG.723
(pending) and G.729. If set to “Yes”, a small quantity of RTP packets containing
comfort noise will be sent during the periods of silence. If set to “No”, this feature is
disabled.
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. 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 and the actual frames
transmitted during the in-payload call. For end users, it is recommended to use the
default setting, as incorrect settings may influence the audio quality.
The default setting is 2.
G723 Rate
This option determines the encoding rate for G723 codec. Users can choose from
6.3kbps encoding rate and 5.3kbps encoding rate.
The default setting is “5.3kbps encoding rate”.
RTP Settings
SRTP Mode
Enable SRTP mode based on your selection from the drop-down menu.
● No
● Enabled But Not forced
● Enabled and Forced
● Optional
The default setting is “No”.
SRTP Key Length
Allows users to specify the length of the SRTP calls. Available options are:
● AES 128&256 bit
● AES 128 bit
● AES 256 bit
Default setting is: AES 128&256 bit
Crypto Life Time
Enable or disable the crypto life time when using SRTP. If users set to disable this
option, phone does not add the crypto life time to SRTP header.
The default setting is “Yes”.
Enable RTCP Enables user to select to use RTCP, RTCP-XR, or disable the feature.
VQ RTCP-XR Collector Name
Configures the host name of the central report collector that accepts voice quality
reports contained in SIP PUBLISH messages.
VQ RTCP-XR Collector Address
Configures the IP address of the central report collector that accepts voice quality
reports contained in SIP PUBLISH messages.
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