Grandstream Networks GSC3570 User Manual page 54

Accept Incoming SIP
from Proxy Only
Authenticate Incoming
INVITE
Account x → Codec Settings
Audio Settings
Preferred Vocoder
Use First Matching
Vocoder in 200OK SDP
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
When set to "Yes", the SIP address of the Request URL in the incoming SIP
message will be checked. If it does not match the SIP server address of the
account, the call will be rejected. The default setting is "No".
If set to "Yes", the GSC3570 will challenge the incoming INVITE for
authentication with SIP 401 Unauthorized response. Default setting is "No".
Multiple vocoder types are supported on the GSC3570, the vocoders in the
list is a higher preference. Users can configure vocoders in a preference list
that is included with the same preference order in SDP message.
When it is set to "Yes", the device will use the first matching vocoder in the
received 200OK SDP as the codec. The default setting is "No".
Configures the GSC3570 to use which codec sequence to negotiate as the
callee. When set to "Caller", the GSC3570 negotiates by SDP codec
sequence from received SIP Invite. When set to "Callee", the GSC3570
negotiates by audio codec sequence on the GSC3570. Default 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, GSC3570 will 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".
GSC3570 User Manual
Version 1.0.3.1
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