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FIRMWARE VERSION 1.0.4.23 GXP2120/GXP2110/GXP2100/GXP1450 USER MANUAL Page 45 of 69
Contact header information for attended transfer. The default setting is
"No".
Transfer on Conference
Hangup
Defines whether or not the call is transferred to the other party
if the
initiator of the conference hangs up. 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".
Preferred Vocoder
7 different vocoder types are supported on the ph
one, 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.
SRTP Mode
Enables the SRTP mode based on your selection. The default setting is
"Disabled".
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 users, it is recommended to use the default setting, as incorrect
settings may influence the audio quality.
No Key Entry Timeout (s)
Defines the timeout (in seconds) for no key entry. If no key is pressed
after the timeout, the digits will be sent out. The default value is 4
seconds.
Use # as Dial Key
Allows users to configure the "#" key as the "Send" key. If set to "Yes",
the "#" key will immediately dial out the input digits. In this case, this key
is essentially equivalent to the "Send" key. If set to "No", the "#" key is
included as part of the dialing string.
G723 Rate Selects encoding rate for G723 codec. The default value is 5.3kbps.
G.726-32 Packing Mode Selects "ITU" or "IETF" for G726-32 packing mode.
iLBC Frame Size Selects iLBC packet frame size. The default value is 30ms.
iLBC Payload Type Specifies iLBC Payload type. The default value is 97. The valid range is