Saturday, July 3

Wireless Booster | Problem and Solution - Part 2

Real Problem 4
Users too much, channels are available in 2.4 wireless antenna are too few, most or all the channels already in use (in fact only 3-4 channels interfere with each other, the others all overlapping frequency) so that interference in the tower itself was a lot.

Stupid solution :
Some customers who complained about the link try to overcome interference by installing wireless booster!

Real Solution 4
GPS capitalize we can obtain data about: the coordinates of the location customers and the distance from the tower NOC. Then make a table of contents user: name user, the degree (if shot with a compass), distance from the tower, channels who used, the allocated bandwidth. Then we make a circular diagram, with the center of the circle the Tower, making the contours of the circle to the distance, eg 1km, 2km, 3km and so on. And by using our user and map the location of the line drawn center. Use colors to distinguish different users on line which almost coincide.


Well, from this chart we can know the density of users and signal beam. Based on this chart we can take steps to action:

  • User the same direction as, if using a PTP can be combined into one, especially if bandwith used not too large, then it can be combined in one Access Point
  • Accordance no.1 if the user requires a large bandwidth and reply each PTP will continue to use channel choose a non-mutual overlapping
  • Accordance no.2 if using channel overlapping each other, then use polarization antennas for different PTP minimize interference.
  • User conflicting direction 180 degrees to avoid using the same channel / overlapping
  • Accordance no.4 if forced to use overlapping the antenna polarization different
  • Prioritize users that require large bandwidth (eg 512kbps) from interference noise channel by freeing the user to use other in the same tower.
  • Combine small users in one acess point, if beamnya coincide, then use grid antenna, but if beamnya wide enough then use an antenna sectoral.


Real Problem 5
One client is in trouble, from the very beginning the installation there was always a packet loss, latency big, but a good signal, but the data broken through. what the hell? because out of the way, you get the solution.


Stupid solution : 
Used wireless booster pairs in the hope the problem can be resolved.

Solution Problem 5
Try to look at the client side, is there an electric field / electromagnetic big enough? whether your client with its location adjacent channel power High voltage? whether the computer monitor where your customers rock? The data will be distorted if there is good enough interference from the field electricity. let alone a radio signal, packet data through UTP cable can be damaged! Specifically for radio equipment that is placed adjacent to the electric field with high, do the following:

  • Grounding the tower
  • Use a metal box with a good reply with grounding (connected to the tower with ground)
  • If tower / box have a ground, the radio wrap with aluminum foil and connect with the body connector on your wifi radio.
  • Use STP cable (no UTP) to reduce interference on the cable
  • For the tower that is not ground (grounding a lightning rod, but isolated with the tower) then connect your tower to the ground. is usually tower at the shop ill-mannered grounding well. Specifically for reducing the electric field disturbance in the computer equipment in the room do the following
  • Install shield on the side facing the building with a voltage power cable high. Here shield-shaped cage / bars ground to stifle electric field disturbance at the building.
  • Use grounding in on roof, the function for shield also attention to open internet cafe / office based on IT technologies

"Avoid building directly adjacent to the High Voltage Line"
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Wednesday, February 17

Your Needs In Printing Is Discount

With discount printing, you can enjoy various benefits. As you know large quantity of printing always enjoys the lower cost per unit of print. Thus, whether you have to print a few hundred or a few thousand, discount printing on wholesale basis offers you lucrative solutions for your marketing requirements. That means, with discount printing you will enjoy the privileges of having a satisfying printing experience for the best possible price. There is a possibility that it may not be exactly the lowest, but still you can get huge benefits if you go with discount printing. Because, the large quantity of printing job always offer the lower cost per unit of print.

Sometimes, there is always doubt in customers' mind that they might have to compromise with the quality of the print jobs. But this is not the case with discount printing. Even with the cheap prices, you can get the best value for your print jobs. Discount printing is not solely concerned with economics.

It is about gaining impressive quality for your prints too. It is about prints that can fully function and perform for your needs in discount printing. As discount printing is readily available, but the point is how you can truly distinguish a printing company that will give you the savings you need from the ones that don't.
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Thursday, February 11

Wireless Booster | Problem and Solution - Part 1

Wireless communication, especially the wifi, do not make any difference to us in touch fellow human beings in the real social life. to speak required mouth (tx power + antenna gain), to hear the ear needed (sense + rx antenna gain). The size of the mouth and ears the same size antenna with gain intensity of the sound that came out of the mouth equal to tx power sensitivity of the same poll with rx sense.

Now I want to explain the lack of wireless signal booster
Real Problem 1
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Many obstacles Line Of Sight so that the signal intensity accepted to be weak, stupid solution used wireless signal booster!

Real Solution 2
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Make a tower so that the barrier Line of Sight can minimized, so that communication can be smoothly.
Analogy : you were talking to a neighbor next door, but do not want to get out room and chose to shout from the room, if the other person you are also were in the room and choose to yell, too, does not make neighbors disturbed? angry neighbors who might have come to you while presented raw punch. would be better if you look through window and spoke with neighbors at each of the windows is not it?

Real Problem 2
==============
Wifi signal is received pretty good, but corrupted data communications, this caused interference signal is too high that's a lot of players wifi overlap, stampede, similar to the term "jamming". Solutions Stupid, used wireless signal booster! Because a stupid notion that one of the most powerful signal that he was will win.

Real Solution 2
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Wifi signal overlap can be minimized by changing the polarization antenna. There are four polarization antenna can be used are: vertical, horizontal, tilted 45 degrees (left) and tilted 45 degrees (right). And seek wifi channel the cleanest test memalui traffic in each channel, choose who can pass the biggest data traffic with the lowest packet loss.

Real Problem 3
==============
Hotspot users most increase (bloom) and some user from the drop signal, from the original signal strength / quality good to be accepted down 10-50%, moved to move channels did not fix the problem, users began complain, which has hotspots so stupid solution used wireless signal booster!

Real Solutions 3
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It is true, that as we get time and increased user will have decrease in signal strength and signal quality, but because it client is also due to the addition more users wifi. The right solution is add you sectoral antenna with 120 degrees and access point working on 1,6,11 channel. With the use of sectoral coverage will strengthen (automatic signal quality also), or start moving dedicated from the original user to be a PTP PTMP.

Continued....
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