14th channel

[luka]

In my country 2.4-2.5 is free band, however all devices support 13 channels.
We have big interferences here... from several places I see 20-40 networks, and some of them are using amplifiers (500 mW+).

I have been thought to change firmware we are using on most of our devices and translate some ap-s/clients/backbones to 14th channel.

I have there two questions related :
- How much gain I expect to loose with this step on my omni and grid antennas? (they are different manufacturrers) Is it possible to have complete unusable antenna? Will this make me another problems?
- How much changing channel to 14th will help me to avoid interference? I know there are other options, like horizontal polarised antennas, stronger client antennas, signal filters.. but they all are costly.

Thanks..

[tog]

I do not think you would lose a significant amount of gain from your antennas, it's not far enough off. Many antennas even simply say they are "2400-2500"

I expect it would help a lot. You would be shifting the center of your channel by 12MHz, avoiding interference even from people on channel 13. It would help assuming nobody else is already blasting on channel 14.

Many horizontally polarized antennas are not costly at all. Most directional 2.4GHz antennas already allow you to change the mounting by 90 degrees to horizontally polarize them. I use horizontally polarized omnidirectional antennas from pac wireless which are about $200 compared to $120 for a sturdy well-built vertical omni. Pac wireless also has some fairly inexpensive horizontal sectors that use the same chassis as the $200 horizontal omni.

[ns-c0de]

Where could one find such a firmware? Or were you thinking of altering it yourself? I would need it for the litle OvisLink 1120 and Alfa AWAP-600g.

[tony]

Prism card firmware does not dictate the channels it supports, but rather a 'production data area', which one can think of as an eeprom. There are some utilities under Linux that allows you to change your card to support the channels you need, though the process is risky, and can cause your card to become unusable.

[theo]

can someone send us the firmware and pda file for prism2.5 minipci.

we want to use channel 14 at prism

[luka]

Where could one find such a firmware? Or were you thinking of altering it yourself? I would need it for the litle OvisLink 1120 and Alfa AWAP-600g.
Are you from Serbia?
I have found several firmwares which can do that (wifi.online.pl ie, or some other but older Tom Vranas versions, or rtl8181.sf.net) but they are old or restricted. Just search on cz or pl domain and you will see, Ovislink is No1 in East Europe :)

I am trying to build my firware now which will include options we need here, like static dhcp lease, htb shaping, common windows port blocking, our logo and similar. The best firmware I have found so far is APPro but it costs nearly like this small blue beast.

Waiting for 5460 to come here, it is based on linux too and will have possibility to reflash firmware with your own.

[ns-c0de]

Yup, NSWireless non-comercial network in Novi Sad, Serbia :)

Btw, I've seen that some Senao (damn 200mW) devices support 14th channel by default.

Oh and,

htb shaping

Everything else is ok, but do you think that ovis's CPU can handle shaping?http://forums.star-os.com/images/smilies/icon_confused.gif

[luka]

BLWireless, Serbska ;)

I have seen that Vrana included in his (outdated) fw version htb shaping, also APPro/lit has this option if I remember correctly.
Ovis has mips 233 or 266 mips cpu which seems faster than one found in wrt54xx, many firmware for it contains this option so suppose it can be used for something..

I am expecting that cpu would handle shapping if there are not too much operations involved. We need two or three classes, just to divide important from non-important traffic portions. Hope will soon have chance to test it.