Specifications

WELL mPBX-U110R Administrator's Guide
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Figure 9-1
As we can see from the outbound route of ‘pstnout’, all phone numbers
starting with 9 will have their first digit stripped off (digit 9) and will be sent
to the E1.
After we have configured the above, we can dial 9 + local number to dial out
via a E1 trunk.
Note: Setting number prefix to wild card X. and setting Strip to 0 digits from
the front will allow all calls to go through this outbound route directly.
9.1.2 Sample Routing via VoIP Trunk
Let’s configure all inside extensions to dial ‘0’ through the VoIP Trunk.
1. Add VoIP service provider
Before we do add this, please make sure you have a VoIP Trunk account.
TrunksVoIP Trunk SIP Trunk