3CX VoIP Provider
The 3CX certification process for VoIP providers is in-depth and goes far beyond simple call in/ call out tests.

3CX is a diverse and feature rich phone system with many aspects to understand from deployment to maintenance.
VoIP providers supplying end customers with 3CX having a detailed understanding of the phone system ensures that businesses making the change to VoIP, or to a new IP PBX, are able to make the most out of it.

Part of the 3CX VoIP provider certification includes having a full working knowledge of the following areas:

DNS Resolution

Applicable for SIP trunk providers using a FQDN (fully qualified domain name) as a Registrar or Outbound Proxy, the documentation available outlines how 3CX does the resolution and what behaviour will present.

Registration/ Authentication

Documentation outlining the 4 types of authentication that SIP trunks can be configured with.

Inbound Calls

This documentation provides information regarding the handling and routing of incoming calls and INVITE messages.

Outbound Calls

How 3CX handles outbound calls through SIP trunks including the structuring of INVITE messages and population of SIP fields.

Codecs & SDP

Support and negotiation of codecs used by 3CX during incoming and outgoing calls. This documentation also includes information regarding SDP (Session Description Protocol) and how this information is obtained.


Fax is a popular feature in 3CX, and this documentation outlines how fax with 3CX works and how it can be set up.

Other Options

Additional information to further customise 3CX and set it up for specific deployment requirements.
Part of the certification process for 3CX partners includes a strategic review of the providers’ services. Free versions of 3CX are available for testing, as well as in-depth test plans for prospective partners to ensure their services are fully compatible.

Partners are also required to retest their services with 3CX each time major changes are made to their services.

The road to becoming a 3CX partner is a long one and requires a lot of preparation. However, this is of great benefit to the end customers, and there is a substantial amount of documentation and support from 3CX through this process.

Here at Aatrox Communications, we pride ourselves on having the highest standard of support and availability of 3CX advanced certified engineers.

We also believe that an important part of providing voice services isn’t just knowing 3CX inside and out but knowing each business that well too. With these combined, we are able to come up with the perfect VoIP solution to suit any need or budget.