[K12OSN] Linux Bell system

Doug Simpson simpsond at leopards.k12.ar.us
Thu Nov 10 17:36:47 UTC 2005

Do you have to manually push the button on your intercom to get the sound 
files to play over the intercom?

If so, there may be an easy way around that. . .

Doug Simpson
Technology Specialist
DeQueen Public Schools
DeQueen, AR 71832
simpsond at leopards.k12.ar.us
Tux for President!

On Thu, 10 Nov 2005, Jim Kronebusch wrote:

> > So you are using cron to schedule bells and delivering the sound 
> > (tones) via your in house intercom system - YES ?  Very smart.   How 
> > did the intercom interface go ?  Any really old systems ?  You can 
> > control alternate schedules and even fire drills and stuff YES ?
> Looks like I was missing one piece.  I now added a daily restart of crond
> after running the script to swap cron jobs.  I also am now adding more stuff
> to play different start of day sounds (such as announcing todays schedule) and
> different end of day sounds (say laughter and jubilation).
> I wired an 1/8th male audio jack to a 3 prong male microphone jack and plugged
> the microphone jack to our receiver for our intercom system.  So now the
> computer is simply another microphone on the system.  Whichever cron schedule
> is set for the day plays the selected audio tone over the intercom system.  I
> can now simply SCP any audio file over to the system and play it on demand as
> well at the command line with "play /path/to/audiofile".  This will be fun.  
> Using the task scheduler from webmin makes a nice gui way to automate the
> scripts ahead of time as well.
> Never thought of using this for fire drills, I don't know what kind of rules
> there are for that but I imagine this would have to be tied into the fire
> sensing system and manual alarm boxes to be of code.
> I hope the scripts and stuff above help.  Let me know if you have any other
> questions.
> -- 
> This message has been scanned for viruses and
> dangerous content by the Cotter Technology 
> Department, and is believed to be clean.
> _______________________________________________
> K12OSN mailing list
> K12OSN at redhat.com
> https://www.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>

More information about the K12OSN mailing list