Wanting to use Wireless to get VoIP extensions to remote buildings.

[jonnyGURU]

Wow!

A LOT of good info there.

This is a LOT cheaper to do than I ever thought. Even with the Cisco equipment.

Why isn't everybody using VoIP over wireless. Between the antennas, routers, WAP/Bridges, an Avaya IP Office Small Office Edition and some Avaya VoIP desksets, this comes under the budget of even a key system with dedicated CO to each building (what they have now.) I can save them money AND allow them to transfer calls from building to building!!!!!

 

[cparker]

Let us know your progress on the project. I'm really interested in how it turns out.

 

[NordicNINE]

For low cost equipment, the Linksys WAP's are good. I've had good luck using WAP54G & WAP11 in bridge mode with external antennas. I have one setup that has a multipoint to point link with one side being about the distance you're talking about, and one being about 50% further.

I bought the antenna's here.

They have alot more options there now.

 

[cparker]

Great site! Thanks.

 

[jonnyGURU]

Well... Topolgy is drawn up. Parts list made. Quote drawn up. All that's left is for someone with authority to sign on the dotted line.

The VoIP works great across a wireless network. I've already tried it between a pair of 54Mbps Orinocco WAP's and everything sounds GREAT. So as long as I don't lose signal between my two outdoor antennas (why would I?) I think everything will be just peachy!

 

[spidey07]

as long as there is no data you should be good to go.

 

[jonnyGURU]

Well.. There actually might be SOME data at one of the locations. But if I put a device like Avaya's security gateway inside each WAP/Bridge to add QOS to my packets, it really shouldn't matter. Right?

 

[bgroff]

Just because you've added QoS to packets doesn't mean the wireless device will actually honor them. That's where the enterprise level equipment comes into play.

 

[jonnyGURU]

Actually... I just thought of something.... If the wireless equipment provides bandwidth of 54Mbps and the Internet connection is only 768K (that's the only thing the data bandwidth on the campus would be used for because they don't have any on site servers or anything) then theoretically the data traffic would never be greater than 768K coming from any or all of the computers simultaneously at any given time.

As for the QOS: Why wouldn't the wireless honor QOS? If the gateway is the first thing plugged into the Ethernet edge of the WAP, and then the phone which has a port for the rest of the network to plug into, why wouldn't the WAP send and receive packets in the same order they're given to them in? Works on point-to-point T1 networks. I'm not sure why wireless would be any different because in my mind, the only thing changing is the meida (or the lack thereof.)

 

[spidey07]

good paper on wireless voice over IP....explains the difficulties and methods used.

http://www.cisco.com/en/US/products/hw/...ign_guide_chapter09186a00802a0a1c.html

QoS isn't about just bandwidth, its about providing the other things voice needs and it works best if its end-to-end.

I'm still confused though are you using wirless phones? or ethernet voice over IP (some kind of switch) with a wireless bridge?

 

[jonnyGURU]

Using VoIP phones. These: http://www1.avaya.com/enterprise/factsheets/lb1901.pdf going through one of these phone switches: http://www.avaya.com/master-usa/en-us/r...rce/assets/factsheet/bp2133_soe_fs.pdf.

Great solution. I've used it plenty of times for remote extensions, but it's always been over someone's DSL or cable modem connection via VPN. I've done it on a business Intranet too and it sounds good even with data traffic. I've just never used it over wireless. That's why I don't think QoS or data traffic will be an issue. If I can get decent VoIP over the ever-congested Internet, then I would think I should have no problem on a wireless Intranet!

 

[Need4Speed]

you need a pair of slotted waveguide antenna's...one at either end with LOS...should do that no problem

http://www.seattlewireless.net/index.cgi/SlottedWaveguide
http://www.trevormarshall.com/waveguides.htm

 

[jonnyGURU]

Originally posted by: Need4Speed
you need a pair of slotted waveguide antenna's...one at either end with LOS...should do that no problem

http://www.seattlewireless.net/index.cgi/SlottedWaveguide
http://www.trevormarshall.com/waveguides.htm

Sounds great but... I don't need that much gain and at $100 for an off the shelf 8db gain antenna, I don't have time (time = money) to build my own antennas!

 

[Need4Speed]

Originally posted by: jonnyGURU

Originally posted by: Need4Speed
you need a pair of slotted waveguide antenna's...one at either end with LOS...should do that no problem

http://www.seattlewireless.net/index.cgi/SlottedWaveguide
http://www.trevormarshall.com/waveguides.htm

Sounds great but... I don't need that much gain and at $100 for an off the shelf 8db gain antenna, I don't have time (time = money) to build my own antennas!

bah! there is no such thing as too much gain do it for the geek factor

 

[jonnyGURU]

I get enough flack for doing things simply because their uber-geek. I don't think making a slotted wave guide antenna needs to be added to my repertoire.

 

[Need4Speed]

Originally posted by: jonnyGURU
I get enough flack for doing things simply because their uber-geek. I don't think making a slotted wave guide antenna needs to be added to my repertoire.

you underestimate uber-geekness ...

good luck to you anyways