VoIP Specialist for Twilio/3CX Configuration

Twilio SIP Trunk / 3CX VoIP Configuration Specialist Needed

**Description:**
I’m looking for an experienced VoIP engineer to help with a SIP trunking setup involving Twilio and 3CX.

The ideal freelancer should have hands-on experience with:

- Twilio Elastic SIP Trunking
- 3CX SIP trunk configuration
- DID setup and routing
- Local and toll-free U.S. numbers
- Inbound and outbound call testing
- Caller ID configuration
- SIP registration, authentication, codecs, and NAT/firewall troubleshooting
- Basic VoIP quality checks and call-flow validation

This is a small but time-sensitive setup task. I’ll share the exact requirements, current environment, and expected call flow privately with shortlisted candidates.

Please apply only if you have configured Twilio SIP trunks with 3CX before, or can clearly explain your experience with similar SIP trunk/PBX setups.

**Screening Questions:**
1. Have you configured Twilio Elastic SIP Trunking with 3CX before?
2. Can you handle both local DID and toll-free number routing?
3. Are you available to start soon after requirements are confirmed?
4. What access/details do you usually need to complete a SIP trunk setup?