Grandstream Networks WP810 Administration Manual page 42

Codec Negotiation
Priority
Disable Multiple m line
in SDP
SRTP Mode
SRTP Key Length
Crypto Lifetime
Symmetric RTP
Silence Suppression
Jitter Buffer Type
Jitter Buffer Length
Voice Frames Per TX
G.726-32 Packing
Mode
iLBC Frame Size
iLBC Payload Type
OPUS Payload Type
DTMF Payload Type
Configures the phone to use which codec sequence to negotiate as the
callee. When set to "Caller", the phone negotiates by SDP codec sequence
from received SIP Invite. When set to "Callee", the phone negotiates by audio
codec sequence on the phone. The default setting is "Callee".
When it is set to "No", the device will reply with multiple m lines; Otherwise,
it will reply 1 m line. The default setting is "No".
Enable SRTP mode based on your selection from the drop-down menu. The
default setting is "Disabled".
Allows users to specify the length of the SRTP calls. The available options
are AES 128&256 bit, AES 128 bit and AES 256 bit.
Default setting is AES 128&256 bit
Enable or disable the crypto lifetime when using SRTP. If users set to disable
this option, phone does not add the crypto lifetime to SRTP header. The
default setting is "Yes".
Defines whether symmetric RTP is supported or not. Default setting is "No".
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"
Selects either Fixed or Adaptive for jitter buffer type, based on network
conditions. The default setting is "Adaptive".
Selects jitter buffer length from 100ms to 800ms, based on network
conditions. The default setting is "300ms".
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.
Selects "ITU" or "IETF" for G726-32 packing mode. The default setting is
"ITU".
This option determines the iLBC packet frame size. Users can choose from
20ms and 30ms. The default setting is "30ms".
This option is used to specify iLBC payload type. Valid range is 96 to 127.
The default setting is "97".
Specifies OPUS payload type. Valid range is 96 to 127. Cannot be the same
as iLBC or DTMF Payload Type. Default value is 123.
Configures the payload type for DTMF using RFC2833. Cannot be the same
as iLBC or OPUS payload type.
WP810 Administration Guide
Version 1.0.7.83
P a g e | 42