Intermittently unable to make external calls

[nickjhunt]

I have one user out of 10 that gets an intermittent error when making external calls. the log shows an error of
L:7957.1[Extn] failed to reach Line:10000>>077xxxxxxxx, reason Not Acceptable HereReason Unknown
line10000 being my Voip provider trunk with 10 lines (1 in use).

next time she tries it works ok.

Internal calls all working ok.

 

[sigma1]

Call your provider. It can be anything from a failure to negotiate a codec to the absence of an actual route. Probably not your issue at all.