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The options described below allow you to customize the CallerID name that will be displayed on the callee's screen when the extension is calling public destinations.

• Set by server: If it supports the CallerID function, the callee's phone terminal will display the extension owner's Contact name.
• Set by equipment: If it supports the CallerID function, the callee's phone terminal will display the caller's name as set up from the phone terminal device.
• Set by user: If it supports the CallerID function, the value defined here will be displayed by the callee's phone terminal; by default, the text box contains the extension's Contact name, but you can set the CallerID name to a custom alphanumeric value.

• Set by server: If it supports the CallerID function, the callee's phone terminal will display the extension's public phone number.
• Set by equipment: If it supports the CallerID function, the callee's phone terminal will display the phone number of that particular phone terminal device.
• Set by user: If it supports the CallerID function, the value defined here will be displayed by the callee's phone terminal; by default, the text box contains the extension's phone number, but you to set the CallerID number to a custom numeric value with three or moral digits;

The numbers available are the ones defined for the channel(s) (resource) used for routing the calls to public destinations.

• The custom text box displays the CallerID number(s) currently in use; the default number is displayed using bold characters;
• To add a CallerID number, click the Change link and a pop-up window will be displayed allowing you to manage the CallerIDs;
• In order to be displayed in this list, the public phone number(s) defined for the channels (resources) used for routing the calls to public destinations must be assigned to the client owning this extension;
• It is possible to assign CallerIDs associated with DIDs that are on the client pool, but that have not been assigned to any extension.

Please note that a CallerID can be set as default even if it has not been assigned to the extension's DID pool. To read more about it, go to the Calling Card Extension page in the VoipNow User Guide.
To associate a CallerID with the extension, you need to select the corresponding checkbox and click the Assign CallerIDs link.
To disassociate a CallerID, you need to select the corresponding checkbox and click the Remove selected link.

Do Not Send not send CallerID on Public Callspublic calls

Applies if you do not want your CallerID to be sent to public destinations.
If the callee's phone terminal supports the CallerID function, it will display the Anonymous string.

Send Public public CallerID on Internal Callsinternal calls

Applies if you want the public CallerID (when available) to be used for local and extended local calls as well.
It allows the association between the CallerID of the Phone terminal user and an existing card code defined for the same CallerID.

Preserve Original original CallerID on Transferred Callstransferred calls

Send SIP P-Asserted-Identity and P-Preferred-Identity Headerheaders

Allows the header headers to be added to all outgoing INVITE requests sent from this extension. 

The SIP P-Asserted-Identity header
The header contains the caller ID number of the extension. , e.g. P-Asserted-Identity:sip:0003*003@localhost.localdomain.

The P-Preferred-Identity header is sometimes used to indicate an additional identity of preference when there is a choice. 

These headers are preserved only on outgoing external calls, e.g. P-Preferred-Identity: "John White" <sip:johnny@somedomain.org>.