Grandstream Networks UCM6510 User Manual page 176

Transport
Keep Original CID
Keep Trunk CID
NAT
Disable This Trunk
TEL URI
Need Registration
Username
Password
Auth ID
Auto Record
Firmware Version 1.0.10.39
trunk.
Configure the SIP transport protocol to be used in this trunk. The default
setting is "All - UDP Primary".

UDP Only

TCP Only

TLS Only

All - UDP Primary: UDP is the primary transport protocol when all the
other SIP transport methods are available too.

All - TCP Primary: TCP is the primary transport protocol when all the
other SIP transport methods are available too.

All – TLS Primary: TLS is the primary transport protocol when all the
other SIP transport methods are available too.
Keep the CID from the inbound call when dialing out. This setting will
override "Keep Trunk CID" option. Please make sure that the peer PBX at
the other side supports to match user entry using "username" field from
authentication line.
If enabled, the trunk CID will not be overridden by extension's CID when
the extension has CID configured. The default setting is "No".
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, UCM6510 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
UCM6510 IP PBX User Manual Page 175 of 339