Dear Friends,
I wanna buy a free license radio with more that 150Mpbs capacity (full
duplex), and I found a company in middle east who has Spectrum-DMR-104-1
available right now, any body has experience about that? Is it really
300Mbps radio?
Thanks
I have no experience with Spectrum.
As an alternative you could look at UBNT. They have some nice radios you
could explore with speed. The AirMax and AirFiber product lines you
might want to explore. I only run standard data over the radios no voice
or video yet. I have only deployed in a PTP setting.
Most wireless radios are advertised by the aggregate amount of bandwidth
they can support versus what you will see via full duplex. When
exploring wireless radios if you need the link to be 150Mbps full duplex
then you need to look for a radio that can sustain at least 300Mbps or
higher. Radios by UBNT are typically 100Mbps to 150Mbps and some people
bond the radios together using LACP on the switch to achieve higher
speeds. However, with AirFiber they have a 1.4Gbps radio now using 24
Ghz license for free the distance is only 13 km though.
Where are you deploying this link? What's the distance? Is this a PTP
link?
HTH
Otis
There are a lot of factors to consider when trying to use ISM band for high
bandwidth...
1. What kind of distance do you want to cover?
2. Is this point to point, or point to multipoint?
3. Directional or Omni?
4. Antenna Height, Fresnel Zone, Noise Floor, other path interference, etc.
The 5.725-5.825Ghz band is used by 802.11a/n and is the only unlicensed
spectrum around 5.8Ghz. A 300Mbps symbol rate should be achievable
with wideband channels in that frequency range. As an example, an Apple
Airport Extreme can do better than 150Mbps full duplex on 802.11n/5Ghz.
Owen
Dear Owen,
Thanks for your reply, in reply to your factors:
1. 1~2 Kilometers
2. PTP
3. Directional
4. 29db Dish (single or dual)
Thanks
In a message written on Thu, Aug 16, 2012 at 11:30:40PM +0430, Shahab Vahabzadeh wrote:
Dear Owen,
Thanks for your reply, in reply to your factors:1. 1~2 Kilometers
2. PTP
3. Directional
4. 29db Dish (single or dual)
I know someone already pointed you to the product, but that just
screams like what you want is the Ubiquity airFiber product. You
should easily get near the max 1.4Gbps throughput at 1-2km if you
have clear line of site. It's "plug and play", in that you should
have to do very mimimal tuning to get that performance. Mostly
making sure the two units are aligned properly.
I've not gotten a quote myself, but the Internet forums suggest the
gear is $3k for a single link (so two units). Just to do high quality
801.11n with dish antennas would probably cost $1k or more.
The 24Ghz band they use should be worldwide license free (check with
your country) and also have less interference than the 5Ghz band.
+1 for ubiquity. I've had excellent results with their products though
I have not used the Air Fiber product specifically and haven't
tested any of the long-haul 1Gbps products.
Owen
[...]
+1 for ubiquity. I've had excellent results with their products though
I have not used the Air Fiber product specifically and haven't
tested any of the long-haul 1Gbps products.
I've many friends that are happy with ubiquity and I've been looking
forward to hearing about any Air Fiber installations.
Anyone actually have one in production?
The word is unless you were one of the chosen ones or placed your order
the day of the announcement they're still trying to fill preorders right
now.
~Seth