Oubound calls suddenly stopped working


Hi there,

I have had my UCM 6202 working perfectly for over a year and suddenly when making outbound calls I get “Your call cannot be completed as dialed”. Inbound calls are fine.
Can confirm, when I reboot the UCM I can make outgoing calls for about a minute before start getting the message.
Any help would be greatly appreciated.



did you change internet providers ? a router or other ?


No changes of router or IP


Sounds like your provider might have made a change - verify with them.


Is this possible with the calls working upon reboot?
My provider claims there has been no changes on their end.


I have 50-100 of the 6208’s and 6308’s in use. For the last several days I have been having this issue. Two days ago I started having issues with inbound as well. I also have multiple carriers and multiple trunks per carrier.

It seems that some something is happening with the trunks but the UCM doesn’t recognize that there is an issue. For instance one carrier of mine has multiple trunks. All of the trunks show registered. When outbound calls start to fail I rotate the trunks until the call goes through. That trunk will stay online for a few hours or up to a day or two. Then it fails and I repeat the process. But the UCM never recognizes that the trunks fail.