Of note:

The Ubiquiti nodes for BBHN do NOT use TDMA (it would require a central authority controlling timeslots) and instead rely on standard 802.11b/g/n  yes bandwidth goes down over the hops (though with good aiming, multiple devices and eventually multiple bands this may be alleviated depending how a network is laid out)

In a mesh your not actually looking at each and every hop decreasing your bandiwth by half  as eventually a packet will make it far enough away that the local devices (your local node and the first relay node) will both have 'open' channels and the next packet can be sent   You can have multiple packets 'outstanding' in a TCP/IP network until you get to what is called the Receive Window (RWIN) which is "max number of packets the destination has not yet answered.

Now onto TDMA.

TDMA does NOT give you a full duplex link.  TDMA = Time Division Multiple Access.

In TDMA Each node has a set slice of time (1/Number of nodes) worth of time (per second)  to send its data where all nodes in the "receive" area  have to hold off and listen for that node to send traffic  and than  when its the next nodes turn it can transmit (or re-transmit) This does solve the hidden transmitter problem however it also means your max bandwidth is going to be MAX-RFSpeed/number-of -nodes  in any Point to Multi Point (ptmp) cluster. 

By its very definition of protocol it is half duplex link as only 1 node can transmit at a time to keep the channel clear.

here is an email that i am sending out, anf you can help or  you are interested plase let me know.

Hello everyone,
  I know you looked at the subject line and thought what in the world, well let me explain.
Central Florida hsmm group and several in the Palm beach county HSMM group are wanting to get some people from your group who maybe comming to Orlando next year to either speak at a forum or give us a over view of what has worked for your group. Our goal is to bring as many hsmm groups together as possible to exchange ideas and info about succes and failure. This exchange of info i believe will benifit HSMM in general.
  This has been started because i found verly little info when i started 7 or 8 months ago on how to get started and what to do with hsmm.. I want  to encourage groups like yours, help promote hsmm, and to provide places that hands on experimentation can be done. I have several things this year we plan locally to have some workshops. But our aim is to have a forum or symposium with as many HSMM groups that we can, and even promote bring your node and lets build a HSMM net during hamcation that will be a test bed for what happens when you have a large number of nodes on the air (will the network handle 200 nodes? what isues arise (aside from RF issues)? Plus it will be a great place to demistate HSMM to an audiance from all over the world (they come to Orlando for the nice warm winters we have and to visit Disney World).
  We are starting to plan now, because we would like as much input and participation as we can muster. I realize you are not local but you can have a part in this, if you are willing to lend a hand. One goal that i want to try is to tunnel to groups like yours and see if we can do video feeds thru the HSMM net acrross the county  thru tunneling (yes i know it is not ham radio at that point, but it will prove the connect ablility). If all goes according to plans even have a few participate in the forum via skype or google hangouts. As i get feedback and interest i will report back from time to time to update you all on the status.

you can email us to let me know your are interested
me Tom KD4WOV at kd4wov@earthlink.net or look for me on Google hangouts
JC NT4K at nt4k@cfl.rr.com

aditional contact would be Darrell kk4IT

To clarify, The three nodes all run BBHN v1.  WRT54GL v1.1, WRT54GL v1.1, WRT54G v4.2.

I connect the PC directly to a LAN port on the node.

Hello Jerry,

I'm not sure a 'best' Ubiquiti device exists,  its a mixture of variables, just like all radio setups.

What your seeing on the bullet in 802.11g models is not 100% specified, in the Rocket datasheet they spec it as 1-24mbps @ -97dbm while on the Bullet they only spec it at 24mbps @ -83dbm

So what is the Bullet at 1mbps? We can't know for sure to be honest if the sensitivity continues towards -97 @ 1mbps  on the bullet  or if it  stays at -83 because it only has a single antenna and can not use both antennas as a diversity receiver. If it is the diversity receiver than it becomes important to note that both antennas need to pointing at the same signal (this is true in Linksys as well)  for that advantage to be realized.

Once you start talking Ubiquiti to Ubiquiti you will also likely jump into the MCS* table which is 802.11n  and the spec sheets are better written here you can see that the sensitivity DOES go down to -96dbm(+/- 2db) on both a Rocket and a Bullet.

I just received a brand new WRT54GL from Linksys ($50) that I'll be converting over, and I'd like to add an external unit at the shack too. From what I've been reading, it looks like one of the Ubiquiti systems would be the best way to go, as they are supported with the new firmware.

What is the best Ubiquiti unit to purchase? That is, which one has the best performance?

I've seen the UBNT.com specs on the Bullet M2 HP. It looks like the easiest to attach to the Omni directional 15 dBi antenna I'm looking at. But the specs I saw at ubnt.com seem to indicate it has lower receiver sensitivity at the lower data rates than their other models.

Is the Bullet less sensitive than the others, or is it just the spec sheet that is worded differently?

Has anyone used the Bullet, and what was their opinion of its performance?

And for those who may have other Ubiquiti models, what was their experience with it, especially the sensitivity?

Jerry

K6ANI

I have three nodes, two of which have been up for a couple of months, and one I just setup tonight. All of them show the other two nodes as neighbors and shows them by name.  If I click on the link, the DNS lookup fails.
  
If I enter the IP address for the node (port 8080), I can get to them.  As a work-around, I put them in my host table.  This works for my three hosts, but is not realistic for connecting to a larger, ad-hoc network. 
 
How do I set up the nodes so that a PC connected to one of the LAN connections on a node, can get DNS support without having to do something on my computer?
 

I looked around the forum and did not see this mentioned anywhere.

73 de Karl, KG1L

It is a pretty straightforward and can be done from a web browser.

Give http://ubnt.hsmm-mesh.org/products/BBHN/wiki/HowTo/FlashUbiquiti a look for a step by step guide with photos.

Sorry to ask such a simple question, but I would like to know if the installation of the firmware on a M2HP is as straight forward as a Cisco, or if there are any fine points I should know about. Thanks.

Problem solved.  OP error, called impatience!  Had to wait for an ip address from the router.  Now all is working fine.

Installed IRSSI, and now on the W4RSS-01 node ok.

I am having trouble connecting to my mesh node with a Raspberry Pi.  I'm sure it's a config problem somewhere.  I can ping the router and ifconfig sees it but I can't connect to the status page.

I'd appreciate some help.

Thanks,

Dick, W4RSS

Kind of related, I have an Addonics NAS 4.0 adapter on one node that allows sharing two 32G thumbdrives.  You access it across the Mesh by going to Run (XP) or Search (Win7) and typing "\\addnas".  I've never figured out a way to publish this as a clickable service off the Mesh Status page... is there a way?

I was pleasantly surprised when after I installed the IRC server on the same node I was able to provide a link to the IRC server as a service, and that PCs on the Mesh could click on that and it open their IRC client.  Once online, someone could then tell them "for files, go to \\addnas" and the \\addnas would become clickable in the chat.  Even more impressive was that if I gave them the full path and file's extension, as long as they had a program that it would open in, there was a clickable link that would open the program and the file... ain't technology grand?!!

Hi all:

 I am trying to get Team Talk 4 up and running.  I have installed the server and client software and have configured the server.  

Question 1. Do I need to bind to a specific IP address?

               2. What do I need to do to log in to the server over the mesh?

               3. How do I advertise this as a service?

               4. Team Talk uses TCP and UDP ports 10333. How do I set that up?

I can login to the server on my laptop where it is installed by using localhost or my IP address or the name of my router  (N7FV-1)

What I cannot do is login from another laptop connected to the mesh.

All routers were re-flashed tonight with the latest firmware. 

I realize that I am asking to be spoon fed. I don't have an IT background and I am hoping that there is a more general tutorial out there that explains how all this works as the help document included in the firmware is still the same from HSMM-MESH, and now the options have changed but the help menus have not.

Thanks in advance

Cory

N7FV

I use an app on my iPhone called "Inet" it shows me what is connected to my network. I have an access point on my node so I scanned my network and it show port :8080 I opened the port and it allowed me to view  Mesh status and wifi status.  It gets unstable trying to run setup and  when connected to another node.