I have ordered a Raspberry PI Mod B card with wall wart.  I have downloaded AsteriskNOW.  I read that Linux Debian is the preferred OS so thought I'd order an SD card preloaded.  I am assuming (ugh!) both the OS and AsteriskNOW should both be on that SD card.  What would be the recommended minimum size I should get (8 GB, 16 GB or 32 GB) assuming I might want to load additional experimental program(s) in the future?

I was super-impressed with the demos and information at this past weekend's Austin Summerfest 2013.  Thanks to all the presenters for your time and effort.  73 de Austin K5YKG near Houston.

Install Asterisk on a Raspberry Pi for use on a Broadband-Hamnet^TM network - Paul KF5JIM

Gary-KI4WPI -> Is it possible that the cheap (2 for 9bucks at Sam's club) SanDisk 4Gb SD cards are indeed "cheap" and perhaps there is a better SD drive someone could recommend?

I check here before I buy:
http://elinux.org/RPi_SD_cards

I've had good luck so far.

I would recommend the class 10 SDHC cards over the cheap class 4 cards. The reason is that the class 10 cards are much faster than the class 4. I have had an RPi Asterisk solution on both class cards and have noticed a definite speed improvement with the 10's over the 4's.

You can find out the class of the card by either looking on the packaging or on the card itself. There will be an almost complete circle with a number inside...that's the class of the card.

I am glad to hear the video went well. As for your little problem Asterisk is probably not loading because it cannot set the system time. Take a look here, and install a fake harware clock: http://www.raspberry-asterisk.org/documentation/#withoutnet
This should solve your problem

KI6WDY,

If you connect the same phone adapter to the same mesh node, it will assign it the next available IP address unless it does not have the MAC address permanently assigned to an IP address or it is still in the dhcp lease. If it gets assigned a different IP address, your registration settings will update asterisk with the newest IP information.

First off, a big thanks to KF5JIM for making it a snap to get this going.  I currently have 3 hardware IP phones and 3 ATAs on my 6 BH nodes.

Back when there was a discussion of hold music vs FCC rules, I posted a question that didn't receive an answer, since this topic is active I figure I'll give it a try here.  I have a Morse code wav file similar to what one would use as a CW ID for a voice repeater that I want to take the place of the stock FreePBX MOH in all instances of operation.  In Settings->Music On Hold I found I had to create a new Category (I called it "Mesh"), and in Connectivity change both my Inbound and Outbound Routes (Google Voice) from "default" to "Mesh" and then my wav file would play when the off-Mesh party was put on hold.

For the life of me, I can't find where to change the MOH from "default" to "Mesh" for extension to extension calls within the PBX.  Does this have to be done from the CLI?

Thanks for any help!

So looking at it, it seems pretty difficult.  There is no easy solution.  In older versions of FreePBX, that feature was available, but now it has been depreciated.  This is the only thing I have found, but I cannot get it to work.

https://issues.asterisk.org/jira/browse/ASTERISK-9131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

exten=> s,1,Answer()
exten=> 999,1,Set(mohclass = my-music)
exten=> 999,2,Queue(my-queue|tn)
exten=> 999,3,Hangup()

And then right after that, it states:

SetMusicOnHold(myclass)

Does the same thing.  I really appreciate you looking into this, I have to do a presentation and demo the nodes for a local club the first of next month so for now I don't want to break something that's working.  When I get past that I may get a second SD card and learn some more Linux. <g>

One more thing, like fake-hwclock, I didn't see this mentioned in the video and had to look it up.  We're used to simply unplugging wall-warts on our routers, but this user's PBX in a Flash page recommends using:

root@pbx:~$ amportal stop

root@pbx:~$ shutdown -h now

For a graceful shutdown.  I assume using Putty and the same commands at the root@raspbx:~# prompt would work?  Or do you have another recommendation? 

I take it FreePBX used to have a shutdown button.  Another great idea depreciated.  :-)