How do I set the caller ID for sipgate trunking?

Instructions for configuring the caller ID for sipgate trunking in E.164 format.

If you want to transmit your caller ID number, you must configure your system so that the desired phone number in the E.164 format (international format, without leading zeros or plus sign) as P-Preferred-Identity header of the INVITE is passed:

P-Preferred-Identity: <sip:[e-mail]>

If your system does not support this, the number can alternatively be transmitted in quotation marks as display name of the FROM header in the same E.164 format be transmitted:

FROM: "49211123456789" <sip:[e-mail]>

Incorrect formats that prevent transmission of the desired outgoing caller ID number include, for example:

• leading plus: [phone]

• Missing country code: 211123456789

• 00 in the country code: 0049211123456789

• Leading zero in the area code: 490211123456789

• Spaces: 49 211 123456789

Hide caller ID

If you want to suppress the caller ID completely, enter in the INVITE header privacy:id in:

FROM: "49211123456789" <sip:[e-mail]>
Privacy: id

Caller ID display for call forwarding

You can also signal that a call was forwarded. Please use the header DIVERSION and transmit the number again in the E.164 format:

Diversion: <[e-mail]>