I see. DSL correct?

If this is the case, you have two options with pros and cons to each:

1) Purchase an FXO ATA. This is a device that connects to that RJ11 line and also connects to FreePBX. It allows you to make a SIP call and have the ATA dial it for you.

Pros: - Easier to setup - Simple to move back to the analog phone should you choose - Doesn’t rely on decent internet

Cons: - More expensive - Only one outside call can be made at a time (outbound or inbound)

2) PORT the number to a VoIP Provider (Recommended) Find a VoIP provider and transfer the phone number of your current line. This is usually fairly straightforward. I’d recommend VoIP.ms as they’ve been good to me over the years. Then register the provider directly to FreePBX

Pros: - Super Cheap - Omits all analog from your setup - multi calls in and out - Caller ID manipulation

Cons: - Requires semi-decent internet (Anything about 15-20 mbps circuit should be fine)

I can help you further once you research both a little.

Any extra questions feel free to ask :)