Yesterday I experienced a problem with our ISDN 30. I could make calls using direct dial numbers to our internal extension numbers (ie from the outside world inwards) however from an internal phone whenever i tried to dial the outside world i would get a busy tone. I know very little about ISDN...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.