What are the details of the IP telephony architecture? Is there any documentation? Daniel, K7DGL On Sun, Jul 15, 2018, 22:20 Carl <carl@n7kuw.com> wrote:
Josh,
I agree with the recommendation by Tom Hayward for the mANT30 antenna with RB912. You can add (or not add) a radome to that. The radome can help reduce interference with a second dish if you end up setting up two links. You may or may not find it more aesthetically acceptable with the radome, a matter of personal preference – but that might be a factor in getting your City to accept it.
You will need true line of sight (visual, clear path) to one of the HamWAN sector locations. For a second dish, you’ll need the same to a second sector. Google Earth can give you a good start in determining if you have line of sight, followed by visit to your rooftop with binoculars. Lastly, once you feel confident you have a shot, invite someone with a dish or panel to visit with you and do a test shot. Is your City Hall at 123 5th Ave, Kirkland? It looks like a two story building at that address? If so, it looks like you should be able to shoot to Capitol Park (in Seattle) and to Haystack. See attached.
When ordering the routerboard, you need to be very careful to make certain you order the international version. The US version is not capable of being tuned to the necessary frequencies to shoot to a HamWAN sector. Some vendors will require you to sign a form acknowledging FCC rules for use of those frequencies, and provide a reference to, or copy of, your ham license before shipping you an international version.
The run from the HamWAN dish/routerboard to your radio room is outdoor rated Cat5e Ethernet cable. No coax runs are required (they exist only between the routerboard and the LNB on the dish).
Something further to consider once you have HamWAN is adding IP telephony at your EOC. We currently have that capability at the Seattle EOC, the Snohomish County EOC, a couple of hospitals. We will soon have it at Washington State Emergency Management Division at Camp Murray. There is little hope at the present time to get it at King County RCECC due to tower constraints and lack of line of sight. Of course, IP telephony can be added without the HamWAN link, but the whole idea for emergency communications is to have a totally independent communications link outside of commercial interconnectivity.
All good stuff to think about. Many here are happy to help you formulate your thoughts and ideas for presenting to your emergency management office.
Carl Leon, N7KUW
*From:* PSDR [mailto:psdr-bounces@hamwan.org] *On Behalf Of *Joshua Saran *Sent:* Sunday, July 15, 2018 3:32 PM *To:* Puget Sound Data Ring *Subject:* Re: [HamWAN PSDR] City of Kirkland
Thank you! A 2nd dish will be in the plan, since it will be going straight down to the radio room in the EOC.
- Josh Saran - N7WPM
On Jul 15, 2018, at 2:27 PM, <rob@nr3o.com> <rob@nr3o.com> wrote:
Josh,
If your location supports it, a 2nd dish can be used for a redundant path to a separate “cell” site should there be temporary problems with one. A good backup for major disasters. A single will definitely get you started though.
Cheers,
Rob Salsgiver – NR3O
*From:* PSDR <psdr-bounces@hamwan.org> *On Behalf Of *Joshua Saran *Sent:* Sunday, July 15, 2018 2:05 PM *To:* Puget Sound Data Ring <psdr@hamwan.org> *Subject:* Re: [HamWAN PSDR] City of Kirkland
Thank you so much! I will look into it and report back.
- Josh Saran - N7WPM
On Jul 15, 2018, at 2:00 PM, Tom Hayward <tom@tomh.us> wrote:
On Sun, Jul 15, 2018 at 1:58 PM Edward Cukiernan <ecukierman@gmail.com> wrote:
I believe the client hardware page is pretty up to date for the equipment you will need:
https://hamwan.org/Standards/Component%20Engineering/Client%20Hardware.html
Thanks Ed, you took the words right out of my mouth. For a city hall, I'd lean for a more professional-looking installation with optimal performance. Check out the third row at this link, the mANT30 antenna with RB912.
Tom KD7LXL
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