Mapping

The entries made under SIP mapping establish a series of rules for number translation to SIP lines in the trunk or gateway mode. Up to 40 mapping rules can be entered.

A SIP line in trunk mode is used for mediating between internal numbers and the range of telephone numbers offered by a SIP account.

For incoming calls, the destination number (called party ID) is modified. The internal number is used if the called party ID matches with the external telephone number.

For outgoing calls, the calling party ID is modified. The external number is used if the calling party ID matches with the internal telephone number.