[asterisk-users] Finding the status of an extension

[Yehavi Bourvine +972-8-9489444]

Hello,

  I would like to check whether an extension is busy or not before calling the
Dial() application to it (for example - to play a Busy if it is on
conversation).

  How do I check it? In the trunk version there was a function
DEVSTATE(SIP/123), however it does not exist on version 1.4.13... What is the
equivalent of it?

                                                      Thanks, __Yehavi: