Introduction

The entry fields "Asserted Identity" within Gateway Groups enables a outgoing Call Forward of an originally PSTN call

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aspects must be respected.-

• Without the use of the "Asserted Identity" function the PBX keeps the origin calling number
  

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• within the outgoing SIP message. If this calling number is unknown for SIP provider the call is rejected.

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• With the use of the "Asserted Identity" function the PBX replaces the origing calling

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• number  with the calling number of an own extension.
  The provider recognizes the calling number as

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• own  number and accepts the call.