Grandstream Networks WP810 Series Administration Manual page 32

INVITE
Account/Audio Settings
Preferred Multiple vocoder types are supported on the phone, the vocoders in the list is a higher preference. Users can
Vocoder configure vocoders in a preference list that is included with the same preference order in SDP message.
Use First
Matchin
g When it is set to "Yes", the device will use the first matching vocoder in the received 200OK SDP as the codec.
Vocoder The default setting is "No".
in 200OK
SDP
Codec
Configures the phone to use which codec sequence to negotiate as the callee. When set to "Caller", the phone
Negotiat
negotiates by SDP codec sequence from received SIP Invite. When set to "Callee", the phone negotiates by
ion
audio codec sequence on the phone. The default setting is "Callee".
Priority
Disable
Multiple When it is set to "No", the device will reply with multiple m lines; Otherwise, it will reply 1 m line. The default
m line in setting is "No".
SDP
SRTP
Enable SRTP mode based on your selection from the drop-down menu. The default setting is "Disabled".
Mode
Allows users to specify the length of the SRTP calls. The available options are AES 128&256 bit, AES 128 bit and
SRTP Key
AES 256 bit.
Length
Default setting is AES 128&256 bit
Crypto Enable or disable the crypto lifetime when using SRTP. If users set to disable this option, phone does not add
Lifetime the crypto lifetime to SRTP header. The default setting is "Yes".
Symmetr
Defines whether symmetric RTP is supported or not. Default setting is "No".
ic RTP
Silence Controls the silence suppression/VAD feature of the audio codecs except forG.723 (pending) and G.729. If set
Suppress to "Yes", a small quantity of RTP packets containing comfort noise will be sent during the periods of silence. If
ion set to "No", this feature is disabled. Default setting is "No"
Jitter
Selects either Fixed or Adaptive for jitter buffer type, based on network conditions. The default setting is
Buffer
"Adaptive".
Type
Jitter
Buffer Selects jitter buffer length from 100ms to 800ms, based on network conditions. The default setting is "300ms".
Length
Unauthorized response.
Default setting is "No".
Table 17: Account/SIP Settings