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Form of phone numbers at incoming calls

We show you what information is important when you set up the routing in your phone system.

To correctly set up the routing in your phone system, make sure you know the form of your phone number in the SIP-Invite. There are two different options:

  1. If the base phone number of your SIP trunk or the single phone number is chosen directly, your phone number will be in the international format (0049xxx). Normally, base phone numbers of blocks of phone numbers (trunks) are not available.
  2. If an extension of your SIP trunk is chosen, the complete phone number has the E.164 format (49xxx).