[Asterisk-Users] Not answering inbound a line used for outbound

[jerry at voiptower.com]

Hi,

I've dug a bit through the wiki and the mailing lists, and haven't really
seen anything like this, but there must be someone out there doing this.

Basically, there is a fax line that I don't want to answer inbound, but I
want it available to do dial out from. Right now, we are using a busy wait
around the ringing line, but I was hoping for something that might be a
little more elegant. Here is the dialplan snip:

exten => s,1,Wait(1)
exten => s,2,GoTo(s,1)

If I'm on the console when a call comes in, it loops through this bit of
code a bunch of times. I'm guessing I could lengthen the "Wait(1)" time,
but is there any other way to do this?

Now, two other related questions:
Can Asterisk recognize that something other then a Zap card has a line
offhook? (ie there is a fax transmission in progress)
Can I do something interesting with CallerID? (for example, create a log
of all faxes that called us, or answer certain numbers inside of asterisk)

Do excuse me if this is all answered in some concise FAQ, but I've been
seriously looking and haven't seen anything about it.

Thanks,
J