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Jumat, 28 Desember 2007
UTP Cable Information
UTP (Unshielded Twisted Pair) Cable is a cable that consist of eight cable.
There is 2 type of UTP Cable: Cat 5e and Cat 6
Cat 5e runs in 100 Mbps working with four cable ( 2 pairs)
Cat 6 runs in 1000 Mbps (Gigabit) working with all of eight cable (4 pairs)
How to Crimping for Cat 5e and Cat 6 very different. So be careful.
Usually each roll of UTP Cable length for 303 meters or 305 meters or 1000 feet
Range : max. 100 meters ( above 100 meters usually drop in data transfer rate)
There are many brand of UTP Cable. From High to Low end cable.
Brand: AMP, Panduit, Avaya-Systimax, Belden, Thomas&Bett, D-Link, Bandwith
Watch Out with the original or fake cable. Because it will affect your backbone networks. Using fake cable will cause : can not connect, missing or failed data transfer rate.
Ask the store for original cable!!!
Price:
Fake Cable: About $40
Original Cable: About $80 and above.
Why there is double price for Original Cable ? Because Original Cable using really copper to all 4 pairs. But Fake cable just using 2 pairs of copper, the others are fake.
Market Trend: Always Increase of Price. Because it follows with the price of copper in the world.
So if you really need UTP Cable, go buy directly before the price are up and up.
Powerful: All Original Branded Cable
Famous: AMP, Panduit, Avaya-Systimax, Belden
Premium Price = Famous
Cheapest for Original UTP Cable: D-Link, Bandwith
Premium price for Original UTP Cable: Panduit, Avaya-Systimax
Middle Price: AMP & Belden (note: Belden USA)
To survey about lost dB, etc: check each website of brand above.
Selasa, 25 Desember 2007
Car MP3 FM Modulator : Cheapest Substitution for Car MP3 Player
Why you should buy expensive car mp3 player (about Rp. 1,500,000) if you can buy Car MP3 FM Modulator with remote also (about Rp.110,000).
How to use:
- Plug in to your car cigarette lighter
- Plug your Flash disk (direct) or MP3-MP4 (via cable audio from jack earphone mp3 to FM Modulator)
- Open your car tape - FM Radio
- Adjust FM Modulator as same as car tape - FM Radio frequency.
- Sound will out from your car speaker.
Sound Quality: Stereo . Same as Car-Tape Player
How to use:
- Plug in to your car cigarette lighter
- Plug your Flash disk (direct) or MP3-MP4 (via cable audio from jack earphone mp3 to FM Modulator)
- Open your car tape - FM Radio
- Adjust FM Modulator as same as car tape - FM Radio frequency.
- Sound will out from your car speaker.
Sound Quality: Stereo . Same as Car-Tape Player
Anything About Fiber Optic Cable
Fiber Optic using in condition:
- Above 100 meters that UTP cable can not handle it
- Area with High Electromagnetic. Fiber Optic is not affect with High Electromagnetic because user fiber glass for data transfer
- Need a fixed and reliable connection of data transfer for your networks
- Far area with high data transfer rate. Fiber Optic could reach 100 Mbps, 1000 Mbps, 10.000 Mbps.
Physical Cable (usually using Direct Buried Cable): include Jacket from black rubber, stainless jacket, and others poly-thing that protect the Fiber Optic Core.
There is 2 type of Fiber Optic Cable: Multi Mode & Single Mode
Multimode : 50 micron , 62.5 micron (62.5 micron is an old size. now 50 micron is a standard)
Single mode: 9 micron
Range:
Multimode 50 micron:
100 Mbps: 2 km
1000 Mbps: < 550 mtr
Singlemode 9 micron:
100 Mbps: 5 km
1000 Mbps: < 2 km
The range above is physically maximum range for the cable. If you use active device such as switch or media converter, it will be more higher range depending on active device.
Pricing: counting per meters
Brands: Netviel, Corning, CCSI, Panduit, Avaya-Systimax, AMP, Voksel, Furukawa
This information is just about Fiber Optic Cable. Not Include Fiber Optic Accessories such as rackmount or wallmount Fiber, Adaptor Coupler, Fiber Optic Connector, Patch Cord Fiber Optic, Termination or Splicing etc. I will provide it in the next blog.
Good and Bad News About Flash Disk
Flash disk is becoming a must thing that we should bring in our activities either in business, school or college. Nowadays, there is a lot of brand for flash disk. Not include their capacity and function. Capacity 512 MB (will be extinct), 1 GB, 2 GB, 4 GB, 8 GB. Function: Fingerprint censor, laser pointer, security protection software, etc.
i want to give you bad and good news in flash disk world.
GOOD News:
1. There will be more cheaper and cheaper products with higher capacity. now, minimal capacity is 1 GB. Because memory flash will have a down price to adjust with new high capacity
2. There are many models and function for flash disk. Such as cartoon images, rubber, fingerprint, laser pointer, exclusive design, etc. Flash disk can not be boring.
3. Many brand of flash disk in market. That's mean a competition between brands and we are as customer will take an advantage in price.
4. Flash disk hard to broken. Therefore, many brand claim that a lifetime warranty for their products. But who cares about lifetime ? capacity always increase in the future and that is means we should buy another higher capacity flash disk and throw your old flash disk to garbage.
5. Flash disk is a simple thing that can we bring anywhere,anytime and small. Now in the market, there are very small flash disk like a half of cigarette lighter size.
BAD News:
1. Flash disk is a mass market products and there is a lot of brand with unknown eligible principal/vendor/importer. Be careful, because you do not want to buy something that can not be complain if it is broken.
2. There is a cheating for flash disk. 1 GB with just only physically 512 MB. It is because factory
are playing with firmware to flash the memory with higher capacity over the memory from physical flash
3. Pricing for flash disk very amplitude thing (up and down so fast). Compare, search and find it more deeply
That is all about GOOD and BAD news in flash disk.
Hope you are can buy wisely.
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