User's Manual

GXP1760W Administration Guide
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If Force Timer is set to “No”, the phone will enable the session timer only when
the remote party supports this feature. To turn off the session timer, select “No”.
The default setting is “No”.
UAC Specify
Refresher
As a Caller, select UAC to use the phone as the refresher, or select UAS to use
the Callee or proxy server as the refresher. The default setting is “Omit”.
UAS Specify
Refresher
As a Callee, select UAC to use caller or proxy server as the refresher, or select
UAS to use the phone as the refresher. The default setting is “UAC”.
Force INVITE
The Session Timer can be refreshed using the INVITE method or the UPDATE
method. Select “Yes” to use the INVITE method to refresh the session timer.
The default setting is “No”.
Account x  SIP Settings  Security Settings
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 Certificate
Chain
Validate certification chain when TCP/TLS is configured. 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. Default setting is “No”.
Account x  Audio Settings
Preferred Vocoder
Multiple vocoder types are supported on the phone, 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.
Note: Using firmware version 1.0.0.43 or higher, users are now able to perform
concurrent calls using G.729 codec as well.
Use First Matching
Vocoder in 200OK
SDP
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”.
Hide Vocoder
Enables / disables displaying the vocoder information on the call screen.
Disable Multiple m
line in SDP
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”.