Inbound SIP Trunk Calls Not Reaching Customer PBX
When inbound calls to your business phone system (PBX) via a SIP trunk fail to connect, it can disrupt communication with your customers. This article will help you understand the causes, troubleshooting steps, and our approach to resolving this issue.
What is it and why it matters
Inbound SIP trunk calls not reaching your PBX refers to situations where calls originating from external sources (carriers) fail to connect to your business phone system. This can lead to missed opportunities, lost revenue, and customer dissatisfaction.
How it works or what's involved
SIP trunks are the digital equivalent of traditional phone lines, allowing your PBX to connect with the outside world. When an inbound call fails, it may be due to issues with the SIP trunk, carrier, PBX, or network configuration. To diagnose the problem, we collect call details, confirm the intended destination, and check for any recent changes that might impact call routing.
What the customer should know or prepare
To help us resolve the issue, you'll need to provide specific details about the failed calls, such as caller ID, called DID, timestamp, and any relevant carrier information. Additionally, you'll need to share your PBX/SBC target information, including the IP/FQDN, port, transport, and failover route if any.
Common questions or issues
- Why are only calls from certain origins/carriers failing? This could be due to issues specific to that carrier or their network configuration.
- What should I do if I'm experiencing outbound call issues instead? Outbound call issues are a separate issue and should be addressed through our dedicated support channels.
How Bigfoot Voice handles this
When you report inbound call failures, our support team will investigate the issue by collecting call details, confirming the intended destination, and checking for any recent changes that might impact call routing. We'll work with you to resolve the issue as quickly as possible, documenting the cause and any necessary follow-up actions.
We appreciate your patience and cooperation during this process. If you have any questions or concerns, please don't hesitate to reach out to our support team.
For more detailed information about SIP trunks and their configuration, please refer to our N05 Train articles.