This article provides solutions for common PortSIP PBX issues when making calls. When you make a call from the app or an IP Phone, if the call fails, you will receive a status code indicating the reason. Below, we explain the status codes and their meanings:
480 - Temporarily Unavailable
This status code usually means the callee is not online or unavailable to answer your call.
408 - Request Timeout
This status code indicates the callee can’t be reached, possibly due to a lost network connection.
503 - Service Unavailable
This code may appear for the following reasons:
- The PortSIP PBX can’t provide service at this moment.
- The app/IP Phone failed to resolve the PBX domain DNS.
- The SIP trunk can’t provide service at this moment if the call is sent to the trunk.
- The PortSIP PBX failed to resolve the trunk domain DNS.
403 - Forbidden
This code may appear for the following reasons:
- The current usage exceeds the PortSIP PBX license.
- If you make a call to the SIP trunk and the called number starts with a +, it means this is an international call. In this case, if the extension caller role is a standard user, they will receive this error since standard users do not have permission to make international calls.
- If the extension caller has permission to make international calls, but the country code is disallowed, you will need to allow the country code in the menu: Blacklist and Codes > Codec and E164. Click the tab ALLOWED COUNTRY CODE and select the country code to enable it.
- The current established calls have reached the maximum call limit of the trunk.
- The callee number is in the PBX number blacklist. You can manage the blacklist in the menu: Blacklist and Codes > Number Blacklist.
402 - Payment Required
This code appears if the tenant admin has enabled online billing, but the extension caller does not have enough balance.
404 - Not Found
This code may appear for the following reasons:
- The called extension number does not exist.
- The called PSTN number does not exist.
- The outbound call doesn’t match any outbound rule.
- The outbound call matched a trunk that was not available.
- The outbound rule matched, but it is currently outside office hours or during holidays.
Feel free to contact the PortSIP support team at support@portsip.com or submit a ticket. Our team will help you resolve any issues.
