3CX External Call Issue Fix
Budget: $10 – $30 USD
My 3CX system runs flawlessly for on-site extensions, yet every time we place or receive external calls the line drops or never connects. I need an experienced 3CX specialist to dive straight into troubleshooting and eliminate these connection problems.
You’ll get full remote access to the PBX (version 18 on Debian), SIP trunk details, and firewall console. I’m looking for someone who can:
• Analyse logs and packet captures to spot what blocks or misroutes the calls
• Adjust firewall rules, SIP trunk parameters, STUN or SBC settings as needed
• Test several scenarios until every external call completes with stable audio
• Leave me with a brief summary of the root cause and the exact changes you made
Internal calls are fine, so the focus is exclusively on external connectivity; no installation or general configuration work is required. If you’ve solved similar issues with 3CX before, especially across mixed networks and VoIP providers, I’d like to get this fixed as soon as possible.
You’ll get full remote access to the PBX (version 18 on Debian), SIP trunk details, and firewall console. I’m looking for someone who can:
• Analyse logs and packet captures to spot what blocks or misroutes the calls
• Adjust firewall rules, SIP trunk parameters, STUN or SBC settings as needed
• Test several scenarios until every external call completes with stable audio
• Leave me with a brief summary of the root cause and the exact changes you made
Internal calls are fine, so the focus is exclusively on external connectivity; no installation or general configuration work is required. If you’ve solved similar issues with 3CX before, especially across mixed networks and VoIP providers, I’d like to get this fixed as soon as possible.