Gee willikers George, What color panties should I buy the ole' lady? - Hehehe
All the bandwidth intensive applications are at the hospital itself. The whole major purpose of the 10mbps connection is for a system they call PAC's which is a X ray thing that transmits the pictures via internet to a group of Doctors outside the USA (but in USA Territory) where it is read at the time of arrival then the results retransmitted back to the hospital via internet. It can be done with 1.54mbps, but they have their smaller clinics, Dr.'s offices, Home Health offices, billing and something else off site and they are trying to drop Bell South and her DSL crap. That is the purpose of the AU and SU's. It is mostly for internet access, but billing will be done via wireless as well. There will be no heavy usage of the LAN short of internet connectivity and our VoIP. This will be our 5th hospital to connect via wireless and be their major provider with Bell South being their back up connection. We aint done to bad for being high tech red necks here in N. Louisiana with the medical facilities and banking industry. The beauty of the Alvarion SU's is that they are software upgradeable to 54mbps. If they decide at a later date that they need better/more throughput at one of these locations then all we have to do is buy the upgrade for the SU. If that don't do what they want then all we have to do is buy another AU. I have given them too many options already and this one seems to be the one that they can afford and the one that makes the best sense to me. I have left them in the driver's seat. The other thing is that I will own the wireless LAN. There will be a 3 year contract signed on this wireless LAN just like it was with the 10mbps connectivity. I am not going to tell what I get per month for these wireless LANs around here, but I can say that it is nice for me and they get to choose the cream of the crop of wireless gear, transfer rates and never have to worry about maintenance or upkeep. If something doesn't work (we monitor) we show up and take care of it - regardless where the trouble is at. Mac -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of George Rogato Sent: Friday, March 02, 2007 9:43 PM To: WISPA General List Subject: Re: [WISPA] ALVARION VL 4.0 AP Ok, After some thought I have a suggestion for you Mac. 1st, your dealing with a hospital and I'm assuming your connecting their buildings together to connect their lans from each building and tying them all together. Under that assumption, I wouldn't think a PtMP solution is really the solution. Hospitals have losts of money or at least spend lots of money, why would a few radios be any diferent? 2nd they have some bandwidth usage that can be taxing. An example such as MRI's and CAT scans. Not sure if you know what MRI files are like, but generally their mega size files, gigs of pictures of peoples brains\bodies sliced into thin slivers with lots of slices at very high resolution. When hospitals need a radiologist to give them a quick assesment of a patients condition in life threatening situations, they use the network to get the radiologist the files so he can tell thm how to proceed quickly. They do NOT want to wait. Time is of the essence. Around here they call the radiologist at home if he's home and they don't want to wait a half an hour for him to get into the hospital. So I have some experience here because the radiologist is my customer and I've seen him in action. The MRI and Radiologist is just one example of heavy usage. I'm sure there are others. Now your connecting the buildings together. Do you want a slow connection connecting each building together using PtMP where the AP can be bogged down because it's now the center hub of the network connecting all the buildings tohether? Preferably not. What you should be doing is using a multiple ap's and su's or multiple PtP's with each ap providing a seperate connection for each building. This way you've increased the capacity of the network connectivity, added increased performance and eliminated an ap from becoming the hub of their network. You could use 10MHz channel widths if you need to be conservative in spectrum. What I wouldn't want to do to a hospital is be cheap out the get go. Generally the hospitals networks admins are the types of admins that think they are network gods. So you don't want to start out with a typical low cost broadband delivery offering and ley them pick you apart if it's not up to snuff for them. You should give them choices and allow them to make the decision. I would offer them a package using indivisdual PtP links and a cheaper package using PtMP and let them choose based on what they feel they will need. You may be surprised that they will choose to spend a few extra thousand dollars to do the job right. I'm also thinking that an su that can only deliver 6 megs is really NOT something I'd be offering anyone in these situations. I mean why wire a network with 10/100/1000 and then have a 6 meg choke??? What we do as a wisp delivering broadband is not the same thing as a hospitals network, or anyone elses network. Anyways, food for thought. I'd hate to see you go in with just one idea that may make you not look as good as you are. George Patrick Leary wrote: > We do not poll, deliberately. Polling has lots of overhead, especially > as users are aggregated since all users are being polled whether they > have something to "say" or not. We don't use pure scheduling or pure > CSMA/CA either. We do implement various ways of concatenation (packet > aggregation) and some other tricks to reduce multipoint overhead as much > as possible. > > Patrick Leary > AVP WISP Markets > Alvarion, Inc. > o: 650.314.2628 > c: 760.580.0080 > Vonage: 650.641.1243 > [EMAIL PROTECTED] > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of George Rogato > Sent: Friday, March 02, 2007 11:08 AM > To: WISPA General List > Subject: Re: [WISPA] ALVARION VL 4.0 AP > > Is the ALVARION VL 4.0 AP a polling radio system? -- George Rogato Welcome to WISPA www.wispa.org http://signup.wispa.org/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
