[Asterisk-Users] shared fxo line

[Wilson Pickett]

> The only thing I can think of that might cause problems is if Asterisk
> tries to send an sms while someone else is using the phone line. Can
> asterisk detect that the line is otherwise not in use, eg take phone off
> hook, detect dialtone, fail if no dialtone?

asterisk doesn't detect dialtone at all, AFAIK

It doesn't work well with other things like phones on the same line,
but if you have it set to ignore calls, that won't be a problem.