Applicability
- Firmware version: Any
- Model: S-Series
Problem Description
The SIP trunk is registered, but PBX can't receive the incoming call. When receiving the incoming call, the S-Series PBX reply '401 Unauthorized'.
Analysis
The PCAP log shows the S20 reply '401 Unauthorized'.
The CLI log shows 'didn not match the Provider's IP address'.
Solution
Change the port from 0 to 5060 on trunk page.
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