For national calls the customer would like to dial 0020xxxxxxxx, where the 1st 0 is the digit to establish an outgoing PSTN call and 020 is the city number.
Based on below configuration, it's only possible to make an outgoing call with 020xxxxxxx to make local calls (without the extra 0 in front of 20).
I have tried to add an additional 0 in the outgoing dial-peer, but the problem is that the extra 0 is send to the PSTN network and cause that the number wouldn't be accepted.
Is there a standard format for national and international calls, which I can apply for outgoing calls, or how can I modify the outgoing dial-peer which add a '0' for the customer, but doesn't send this digit to the PSTN network.
In your example, you could simply remove the "forward-digits all" command. If you dial 0020xxxxxxx, the first 0 will be stripped and the rest of the digits will be sent to the PSTN. By default, dial peers strip explicitly matched numbers.
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