Configure Proximus with 3CX
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Proximus is the largest of Belgium’s telcos, and was previously known as Belgacom. They offer Business VoIP services under various names, at the moment the one we tested for which documentation below applies is :
- Proximus - Enterprise VoIP
Reference Web Address: Proximus
Some providers gained support and compatibility with 3CX on a specific product version. It is advisable to always run the latest version of 3CX to ensure ongoing compatibility.
Minimum 3CX Version: 3CX Phone System 15.5
Below is a short overview of the provider's capabilities and services and whether they’re supported or not:
- CLNS (Clip No Screening): No
- Catch All Routing: Yes, static SI per trunk
- Fax in T38: No
- CLIR (Number Suppression): No, incoming only
- DTMF via RFC 2833: Yes + In-Band
- Codec Order: G711A, G729
- NAT: n/a
- Other: Comes with local SBC device in customer’s network
Configure the Trunk with 3CX
As authentication is IP based, you will just need to replace the Registrar IP by your Proximus device’s IP and specify the number of SIM Calls below as per your contract.
When configuring Proximus Business SIP Trunks in 3CX, all numbers should be entered in a 9-digit national format otherwise calls will be rejected.
Outbound Caller Id
Proximus do not support Clip No Screening, meaning that you can present only your own numbers. Those must be input in 9-digit national format.