Grandstream Networks UCM6102 User Manual page 157

NAT
Disable This Trunk
TEL URI
Need Registration
Username
Password
Auth ID
Auto Record
Advanced Settings
Codec Preference
From Domain
From User
Send PPI Header
Firmware Version 1.0.9.26
Turn on this option when the PBX is using public IP and communicating
with devices behind NAT. If there is one-way audio issue, usually it's
related to NAT configuration or SIP/RTP port configuration on the firewall.
If selected, the trunk will be disabled.
Note:
If a current SIP trunk is disabled, UCM will send UNREGISTER message
(REGISTER message with expires=0) to the SIP provider.
If the trunk has an assigned PSTN telephone number, this field should be
set to "User=Phone". Then a "User=Phone" parameter will be attached to
the Request-Line and TO header in the SIP request to indicate the E.164
number. If set to "Enable", "Tel:" will be used instead of "SIP:" in the SIP
request. The default setting is disabled.
Select whether the trunk needs to register on the external server or not
when "Register SIP Trunk" type is selected. The default setting is No.
Enter the username to register to the trunk from the provider when
"Register SIP Trunk" type is selected.
Enter the password to register to the trunk from the provider when
"Register SIP Trunk" is selected.
Enter the Authentication ID for "Register SIP Trunk" type.
Enable automatic recording for the calls using this trunk (for SIP trunk
only). The default setting is disabled. The recording files can be accessed
under web GUI->CDR->Recording Files.
Select audio and video codec for the VoIP trunk. The available codecs
are: PCMU, PCMA, GSM, AAL2-G.726-32, G.726, G.722, G.729, G.723,
iLBC, ADPCM, H.264, H.263, H.263p.
Configure the actual domain name where the extension comes from. This
can be used to override the From Header.
For example, "trunk.UCM6100.provider.com" is the From Domain in From
Header: sip:1234567@trunk.UCM6100.provider.com.
Configure the actual user name of the extension. This can be used to
override the From Header. There are cases where there is a single ID for
registration (single trunk) with multiple DIDs.
For example, "1234567" is the From User in From Header:
sip:1234567@trunk.UCM6100.provider.com.
If enabled, the SIP INVITE message sent to the trunk will contain PPI
(P-Preferred-Identity) header. The default setting is "No".
UCM6100 Series IP PBX User Manual Page 156 of 305