Grandstream GXP1100 User Manual User Manual
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FIRMWARE VERSION 1.0.8.4
GXP1100/GXP1105 USER MANUAL
Page 33 of 53
Check Domain
Certificates
Choose whether the domain certificates will be checked or not when TLS/TCP
is used for SIP Transport. The default setting is "No".
Validate Incoming
Messages
Choose whether the incoming messages will be validated or not. The default
setting is "No".
Check SIP User ID for
incoming INVITE
If set to "Yes", SIP User ID will be checked in the Request URI of the incoming
INVITE. If it doesn't match the phone's SIP User ID, the call will be rejected.
The default setting is "No".
Accept Incoming SIP
from Proxy Only
When set to "Yes", the SIP address of the Request URL in the incoming SIP
message will be checked. If it doesn't match the SIP server address of the
account, the call will be rejected. The default setting is "No".
Authenticate Incoming
INVITE
If set to "Yes", the phone will challenge the incoming INVITE for authentication
with SIP 401 Unauthorized response. The default setting is "No".
Account 1 -> Audio Settings
Send DTMF
Specifies the mechanism to transmit DTMF digits. There are 3 supported
modes: in audio which means DTMF is combined in the audio signal (not very
reliable with low-bit-rate codecs), via RTP (RFC2833), or via SIP INFO.
DTMF Payload Type
Configures the payload type for DTMF using RFC2833. The default value is
101.
Preferred Vocoder
7 different vocoder types are supported on the phone, including G.711 U-law
(PCMU), G.711 A-law (PCMA), G.723.1, G.729A/B, G.722 (wide band), iLBC
and G72-32. Users can configure vocoders in a preference list that is included
with the same preference order in SDP message.
Use First Matching
Vocoder in 200OK SDP
When set to "Yes", the device will use the first matching vocoder in the
received 200OK SDP as the codec. The default setting is "No".
SRTP Mode
Enables the SRTP mode based on your selection. The default setting is
"Disabled".
Crypto Life Time
Choose whether to include the lifetime parameter in SRTP crypto offer.
Symmetric RTP
Defines whether symmetric RTP is supported or not. The default setting is
"No".
Silence Suppression
Controls the silence suppression/VAD feature of the audio codec G.723 and
G.729. If 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".
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