asterisk users - Dec 2004 - BLOCKING incoming FAXES on voice line.

At time to time somebody is trying "their luck" and send me most
likely
a junk fax on my voice line.  During normal working hours is not a
problem I just pickup the line and hangup the call but after-hours my
voice mailbox is intercepting the call and recording those
"beeps" (waisting my CPU cycles).

Is there a way to block call / issue hangup command if the incoming call
is a fax?

-- 
#Joseph

Joseph wrote:
> At time to time somebody is trying "their luck" and send me most
likely
> a junk fax on my voice line.  During normal working hours is not a
> problem I just pickup the line and hangup the call but after-hours my
> voice mailbox is intercepting the call and recording those
> "beeps" (waisting my CPU cycles).
> 
> Is there a way to block call / issue hangup command if the incoming call
> is a fax?
> 
Assuming you're getting the calls on some sort of a Zap channel, then in 
the same context where your extention is defined, add:

exten => fax,1,Hangup

or even better yet:

exten => fax,1,Background(if-this-really-is-a-human-please-press-1)
exten => fax,2,Hangup

You must also have:

faxdetect=incoming

In zaptel.conf for this to work.

Hope this helps,
Gilad

-- 
Gilad Ben-Yossef <gilad@codefidence.com>
Codefidence. A name you can trust(tm)
Web: http://codefidence.com  | SIP: gilad@pbx.codefidence.com
Tel: +972.9.8650475 ext. 201 | Fax:  +972.9.8850643

"I am Jack's Overwritten Stack Pointer"
	-- Hackers Club, the movie

On Sat, 2004-12-04 at 19:21 -0700, Joseph wrote:
> At time to time somebody is trying "their luck" and send me most
likely
> a junk fax on my voice line.  During normal working hours is not a
> problem I just pickup the line and hangup the call but after-hours my
> voice mailbox is intercepting the call and recording those
> "beeps" (waisting my CPU cycles).
> 
> Is there a way to block call / issue hangup command if the incoming call
> is a fax?
On zap interfaces enable the fax detect in zaptel.conf and the create a
fax extension which just hangs up.


-- 
Dave Cotton <dcotton@linuxautrement.com>

On Sat, Dec 04, 2004 at 07:21:03PM -0700, Joseph wrote:
> Is there a way to block call / issue hangup command if the incoming call
> is a fax?
"Asterisk as a fax/voice switch" documentation can be found at
http://www.voip-info.org/wiki-Asterisk+fax


-- 
Stefan Tichy   <asterisk@pi4tel.de>

> At time to time somebody is trying "their luck" and send me most
> likely
> a junk fax on my voice line.  During normal working hours is not a
> problem I just pickup the line and hangup the call but after-hours my
> voice mailbox is intercepting the call and recording those
> "beeps" (waisting my CPU cycles).
> 
> Is there a way to block call / issue hangup command if the incoming
> call
> is a fax?
> 
> -- 
> #Joseph
Try the "fax" extension in your extensions.conf file:

exten => fax,1,Dial(Zap/4)

or

exten => fax,1,Hangup

>From the sounds of it, you don't have any menu for the incoming caller?
They come straight to your phone? You'll have to put in a menu now for
the incoming callers, play an announcement, etc. The result: No more
faxes. No more telemarketers (mostly). Your customers/coworkers have to
dial 1 or something else creative to reach you, which hopefully isn't
too much trouble.

So, your incoming menu goes from something like this:
[incomingcall]
exten => s,1,Answer
exten => s,2,Dial(x)
exten => s,3,Voicemail(u1) ; If unavailable, send to voicemail 
...
exten => s,103,Voicemail(b1) ; If busy, send to voicemail
...


Now, you COULD try just adding the fax extension, and not including a
menu. The trouble is, though, that unless the fax tone sounds right
away, asterisk will go straight to the dial before the fax tone is
heard. You might be able to insert a few seconds delay to allow the fax
tone a chance to be heard... but... I've never tried this, and it might
not work...

[incomingcall]
exten => s,1,Answer
exten => s,2,Wait(2) ; remem, callers sit with blank line... wondering..
exten => s,2,Dial(x)
exten => s,3,Voicemail(u1) ; If unavailable, send to voicemail 
...
exten => s,103,Voicemail(b1) ; If busy, send to voicemail
...
exten => fax,1,Hangup



Barring this, you can do the menu:

Your context now goes to:

[incomingcall]
exten => s,1,Answer
exten => s,2,Background,incoming-caller-announcements-sound-file
exten => 1,2,Dial(x)
exten => 1,3,Voicemail(u1) ; If unavailable, send to voicemail 
...
exten => 1,103,Voicemail(b1) ; If busy, send to voicemail
...
exten => fax,1,Hangup
exten => t,1,Goto(incomingcall,s,2) ; can't think of something to dial?
exten => i,1,Background,you-have-not-chosen-wisely-announcement-snd-file
exten => i,2,Goto(s,2) ; shorter version of above
exten => o,1,Congestion
...

or whatever.


murf

-- 
Steve Murphy <murf@e-tools.com>
Electronic Tools Company

> Is there a way to block call / issue hangup command if the incoming call
> is a fax?
Look for 

faxdetect=incoming 

in zapata.conf and then put a fax extension and do whatever you want
there. If you were sure they were junk faxes, you could maybe tie up
the machine for a few minutes each time, especially late at night. I
hate junk faxes!