Welltech ePBX40 V.2.0 - Manual (Page 58)

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ePBX40 send the Extension’s Caller ID to this SIP Trunk if you
set up empty here.
Note:
 Normally, SIP From URI protocol contains both the
Extension’s Calling ID and ePBX40’s IP address. But some
ITSP may reject this call due to security consideration. You
can modify the Calling ID and IP/Domain in the fields of
[External Server Address] and [Outbound Caller ID] when
the call is going to the Destination (SIP Trunk) via the
ePBX40 to avoid such security issue.
 If you installed one external FXO gateway as the SIP Trunk,
you can simply use the default Trunk 888 or 889 as the
FXO’s register number.
 To install external FXO gateway, you need to configure
Trunk Number, Password, Host, Dial Plan and NAT Traversal
Mode.
 If you set up the ITSP ( SIP Server) as the SIP Trunk, you
may need to set up the following configuration: Port,
External Server Address and Outbound Caller ID.
Caller ID Display
Name When an Inbound call is coming from SIP Trunk, such as 888.
The default Caller ID Name will be either “PSTN number” or
“888”. Specify a number will replace above two numbers to
display at extension.
Comment You can enter a 20 bytes note for each Trunk here.
CLIR Support CLIR (Caller Line Identification Restriction) is a feature to hide
the Caller's Number. For example, extension 101 calls to
extension 102. But 101 won’t like to show the caller ID to 102.
So 101 can activate this feature to hide the caller ID. When 102
got a call from 101, the LCD of 102 should display
"Anonymous".
Apply Click Apply button to save your customized settings and exit
this screen.
Cancel Click Cancel button to exit this screen.