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Example of Aarenet VoIP trunk gateway group settings.

Outbound caller ID

As just the last digit of the trunk number block is changing, you can select just the last digit (in brackets) and put it into the variable $1.

As the provider wants the signalling number in the format (country-code)(city-code)(number), you have to enter this number into the next line (here: 0441234567$1, where the $1 represents the changing part).

For external calls, we will present e.g. 04412345678 to the provider, and he will take care about the correct representation to the called party.

Asserted Identity

These fields are used specially for external forwardings. For Aarenet VoIP Trunk, you can use the same settings as for the Outbound caller ID.

Inbound DIDs

For incoming calls, you can use the regular expression, generated by the setup assistant. In your case you would have to adjust the city-code and the pilot-number, according to your line-settings.

 ^(?:(?:(?:0041|\+41|41|0)?44)?12345)?(.*)

This expression cuts all possibly available country- and city-codes and the pilot-number from the incoming number and only the extension is remaining (here: 678). This will be forwarded to the Inbound Routes.

Inbound caller ID

For incoming calls, we will forward the external number of the caller "as-is" to the phone (e.g. 044987654321). This number can then be used from the call-lists for re-dialling.

Gateways

This field will be empty when you create this Gateway group. It will show later the assigned SIP gateways.