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Author Topic: dir-655 range and 5GHz frequency bands ????  (Read 22622 times)


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dir-655 range and 5GHz frequency bands ????
« on: May 28, 2010, 09:51:07 PM »

it is possible that one day to ennable the 5GHz frequency bands with the dir-655 whit a firmware ??


Wireless networking using the unlicensed (and licensed) 5GHz frequency bands is the new kid on the block. It uses the same basic technology and methods as 802.11g (54Mbps) wireless but operating in the 5.1-5.8GHz frequency bands instead of the 2.4GHz band. Also, unlike 802.11g, it uses OFDM technology over the whole speed range (1-54Mbps); 11g only uses OFDM at speeds above 20Mbps.

Operating at the 5GHz radio bands has several advantages over the more common 2.4GHz band:

   1. Better penetration
   2. Better scatter
   3. No abnormal adsorbtion by water or damp
   4. Larger number of non-overlapping channels which means less radio congestion
   5. OFDM over the whole speed range (better for non line of site operation)

On the downside, the Free Space Loss for 5GHz is about 6db worse than 2.4Ghz but, on the good side, if you are using 5GHz for long range site-to-site connectivity you need to use a higher power level to cover the same distance.

However the raised permitted power levels and the better non-line-of-site capabilities makes it the preferred method for short range building-to-building connectivity and for in-building use.

The IEEE 802.11a standard defines physical-layer rates of 1, 2, 5.5,11, 6, 9, 12, 18, 24, 36, 48 and 54 Mbps. Some products also support a so called Turbo or Super speed which uses two channels simultaneously to give improved speed.
For long range and building-to-building operations where you don't have a clear line-of-site 5GHz seems to be ideal! Higher permitted power levels and OFDM technology mean, with the correct antenna used, distances of at least 10Km are possible even when LOS isn't necessarily there.

Better penetration and the ability to scatter around walls and inside buildings also give significant improvements when trying to reach those hard to get to places in houses or business premises.

The only downside really for 5GHz radio devices is cost. However, as popularity increases expect to see much more competitive pricing in the future. When it comes to either outdoor bridging use or indoor client use 5GHz seems to be the answer. ;D  ;D

excuse me for my bad relish  ;D but dlink is english only and i'm a north american french speaker.... ;D


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Re: dir-655 range and 5GHz frequency bands ????
« Reply #1 on: May 28, 2010, 10:37:41 PM »


No 5ghz on this hardware fasr as I have ever seen or heard.....  You'd need hardware that runs at 5ghz and 2.4Ghz...
DIR-655 A2, FW: 1.35NA


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Re: dir-655 range and 5GHz frequency bands ????
« Reply #2 on: May 29, 2010, 02:17:50 PM »

Correct, that is just impossible with this hardware, which is 2.4 only.
DIR-655 H/W: A2 FW: 1.33


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Re: dir-655 range and 5GHz frequency bands ????
« Reply #3 on: May 30, 2010, 12:13:41 PM »

thx for the information

the subject is lock...  ;D

Update: you could just add a 5Ghz D-Link model DAP to the DIR-655 for 5Ghz WiFi support:
One of the following would work:
DAP-1513, 1520, 1522, 1525, 1533, 1650 series are some of the home and small business class devices.

« Last Edit: January 16, 2015, 09:48:52 AM by FurryNutz »