Grandstream Networks GHP6 Series - SIP Settings - Security Settings; Fax Settings; Preferred Vocoder

Force INVITE
Session Timer can be refreshed using INVITE method or UPDATE method. Select
“Yes” to use INVITE method to refresh the session timer.
SIP Settings – Security Settings
Validate Incoming Messages Default isNo. Defines whether the incoming messages will be validated.
Check SIP User ID for Incoming INVITE
Default isNo. 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.
Direct IP calling will also be disabled.
Accept Incoming SIP from Proxy Only
Default isNo. 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.
Direct IP calling will also be disabled.
Authenticate Incoming INVITE
Default isNo. If set toYes, the phone will challenge the incoming INVITE for
authentication with SIP 401 Unauthorized response.
Authenticate server certificate domain
Default isNo. If this is set toYes, device will check the server TLS certificate to
ensure that the Common Name matches the configured SIP server
Authenticate server certificate chain
Default isNo. If this is set toYes, device will check the server TLS certificate to
ensure that it is authorized by a known Certificate Authority
Fax Settings
Fax Mode T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec PCMU/PCMA)
Fax Tone Detection Mode
Default isCallee. This decides whether Caller or Callee sends out the re-INVITE for
T.38 or Fax Pass Through.
Send Re-INVITE After Fax Completion
Default isNo, If set to “Yes”, device will send an INVITE with audio vocoders upon
competition of Fax to continue session in audio only.
Send Re-INVITE After Fax Tone
If set to “Yes”, device will send a Re-INVITE after Fax tone is detected, disabling will
only work under Broadsoft feature.
Enable Silence Detection for Fax
Disconnect
For fax machines that do not send a Disconnect when fax is done. This option
Enables/Disables the detection of silence in order to know the fax has finished. The
silence period is non-configurable and fixed to 7 seconds.
Audio Settings
Preferred DTMF method (in listed order)
The GXW42XX supports up to 3 different DTMF methods including in-audio, via RTP
(RFC2833) and via Sip Info. The user can configure DTMF method in a priority list.
DTMF-RELAY Tag Respect SIP INFO
Default isNo. If set to No, the DTMF-relay tag in Accept Header is always added in
outbound INVITE. If set to Yes, it depends on if SIP INFO is chosen in Preferred
DTMF Method.
Disable DTMF Negotiation Default isNo. If set to yes, use above DTMF order without negotiation
Enable Fast RFC2833 Default isNo. DTMF will use 240 ms timing. If set to yes, DTMF will 100 ms instead.
DTMF Payload Type Sets the payload type for DTMF using RFC2833.
Preferred Vocoder
The GXW42XX supports up to 5 different Vocoder types including G.711 A-/U-law,
G.726 (Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B, iLBC. The user can
configure Vocoders in a preference list that will be included with the same
preference order in SDP message. The first Vocoder is entered by choosing the
appropriate option in “Choice 1”. The last Vocoder is entered by choosing the
appropriate option in “Choice 8”.
Voice Frames per TX
Number of the frame size when it transmits. Default is2, from 1 -4 for
G711/G726/G729
G723 Rate Defines the encoding rate for G.723 vocoder. By default, 6.3kbps rate is chosen.
G726-32 Packing Mode Choose the packing mode for G726-32
iLBC Frame Size Sets the iLBC frame size in 20ms or 30ms