Grandstream Networks UCM630 Series User Manual page 177

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
Keep Original CID
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
Keep Trunk CID
extension has CID configured. The default setting is "No".
Turn on this option when the PBX is using public IP and communicating with
NAT devices behind NAT. If there is one-way audio issue, usually it is related to NAT
configuration or SIP/RTP port configuration on the firewall.
If selected, the trunk will be disabled.
Note:
Disable This Trunk
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-
TEL URI 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.
Configure the Caller ID. This is the number that the trunk will try to use when
making outbound calls. For some providers, it might not be possible to set the
CallerID with this option and this option will be ignored.
Important Note: When making outgoing calls, the following priority order rule will
Caller ID be used to determine which CallerID will be set before sending out the call :

Configure the name of the caller to be displayed when the extension has no
CallerID Name
CallerID Name configured.
Configure the SIP transport protocol to be used in this trunk. The default setting is
"UDP".

Transport


Allows external numbers the option to get directed to the extension that last called
them.
For Example: User 2002 has dialed external number 061234575 but they were not
Direct Callback
reachable, once they have received missed call notification on their phone, they
would mostly call back the number, if the option "Direct Callback" is enabled then
they will be directly bridged to user 2002 regardless of the configured inbound
CID from inbound call
Username/CallerID (Keep Trunk CID Enabled)  DOD  Extension CallerID
Number  Trunk Username/CallerID (Keep Trunk CID Disabled)  Global
Outbound CID.
UDP
TCP
TLS
UCM630X Series User Manual
Version 1.0.2.25
(Keep Original CID Enabled)
 Trunk
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