Choppy and missed calls


I’m having some trouble using a UCM6104. It frequently shows “SIP outgoing call through trunk failure” and “SIP response code: 407 Call Rejected” in the alert log. What does that mean?


I gather this is intermittent. However, I would expect a 407 error when there’s a UID / password mismatch.

Is it possible that it’s a single phone that’s misconfigured? Are all the phones impacted? Can you take a packet capture and attach it here?



Yes, it is intermittent. I also see events for “SIP internal call failure! From user: +(removed), To user: 116, SIP response code: 486 User busy”

Edit: nevermind this message, the user muted their phone.