GSC35XX Series User Manual
Version 1.0.0.15
Enable Audio RED with
FEC
If set to "Yes", FEC will be enabled for audio call. The default setting is
"No".
Configures audio FEC payload type. The valid range is from 96 to 127. The
default value is 121.
Configures audio RED payload type. The valid range is from 96 to 127. The
default value is 124.
Enables the silence suppression/VAD feature. If it is 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. If set to “No”, this
feature is disabled. The default setting is “No”.
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.
Sets if the device will enable the SRTP (Secured RTP) mode. It can be
selected from dropdown list:
• Disable
• Enabled but not forced
• Enabled and forced
SRTP uses encryption and authentication to minimize the risk of denial of
service. (DoS). If the server allows to use both RTP and SRTP, it should
be configured as “Enabled but not forced”.
The default setting is “Disable”.
Configures all the AES (Advanced Encryption Standard) key size within
SRTP. It can be selected from dropdown list:
• AES128&256 bit
• AES 128 bit
• AES 256 bit
If it is set to “AES 128&256 bit”, the device will provide both AES 128 and
256 cipher suite for SRTP. If set to “AES 128 bit”, it only provides 128-bit
cipher suite; if set to “AES 256 bit”, it only provides 256-bit cipher suite. The
default setting is “AES128&256 bit”.
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