Integrations · PBX
AI receptionist for 3CX
The short answer
Yes. FirstVoice works alongside your 3CX phone system. Unanswered and after-hours calls go to FirstVoice, and FirstVoice can transfer callers back to your team.
Last updated
Try it
Watch a call go into 3CX.
Incoming call
Example caller · Mobile
An example call, sped up. Your setup follows your own questions and rules.
- A call comes into your 3CX system as normal
- If nobody answers, or it's after hours, 3CX passes the call to FirstVoice
- FirstVoice answers, books or takes the details
- If the caller needs a person, FirstVoice transfers them back to your team's number
- You get a summary of every call
FirstVoice with 3CX
Your 3CX system stays. No call goes unanswered.
What happens on a call
- A call comes into your 3CX system as normal
- If nobody answers, or it's after hours, 3CX passes the call to FirstVoice
- FirstVoice answers, books or takes the details
- If the caller needs a person, FirstVoice transfers them back to your team's number
- You get a summary of every call
Getting connected
- Your 3CX admin or phone provider sets unanswered and after-hours calls to go to your FirstVoice number
- We give them the numbers to use for transfers back to your team
- We test it together before it goes live
Nothing changes for your team
You keep your 3CX system, your numbers and your extensions. Your team answers calls as normal, and FirstVoice only picks up the ones they can't.
Technical details, for whoever looks after your software
FirstVoice with 3CX
| Check availability during the call | No |
|---|---|
| Create bookings, jobs or leads | No |
| Recognise returning callers | No |
| Add call notes and summaries | No |
| Trigger follow-up texts or emails | No |
3CX connection details
| Category | PBX |
|---|---|
| Markets | NZ |
| API documentation | Public view docs |
| Zapier | No |
| Make | No |
| FirstVoice plan | Growth or Scale |
| Checked | Against official 3CX documentation, 17 September 2026 |
Own SIP trunks; NZ trunks listed (NZ SIP trunks)
3CX questions
Does FirstVoice work with 3CX?
Yes. FirstVoice works alongside your 3CX phone system. Unanswered and after-hours calls go to FirstVoice, and FirstVoice can transfer callers back to your team.
Do I need a new phone system?
No. FirstVoice works with the 3CX system you already have. Your admin changes where unanswered and after-hours calls go.
Which plan includes 3CX?
Growth ($597 a month) and Scale.
3CX is a trademark of its owner. FirstVoice isn't affiliated with 3CX.
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