Miscellaneous

Outdoor Cable installation is it really a problem?

 Installing outdoor cable or Cat6 outdoor cable can be very difficult task. There are certain guidelines you should follow and specific cable types to use.  This is one person’s opinion of some of the things that should be reviewed and thought about when installing outside or underground.

Many providers sell cable for exterior network use that is not necessarily for that type of location. There are many factors that go against its longevity and use.  Some of these are the most obvious and overlooked.  You should be trying to beat the problems that weather and moisture present to your installation. We’ll say more about that later, but they are the big destroyers.  It’s your enemy and can take an expensive installation and ruin it. 

Try stripping back the protective sheath on wiring that has been run outside in the open and see if the weather or moisture has gotten to it.  A simple clue is once you strip back part of the casing you find water dripping out of it. This can completely decimate your data throughput and transfer rate and begin to deteriorate the cable itself. If you’re an installer you don’t want to have to go back to a site and re-install it all over again. Random data crashes and complaints from customer installations can be hard to detect and even harder to resolve.  No one wants to dig up a buried line just to have to replace it

The outer jacket should be like having a line of defensive line team that can defend you from your enemy, in this case the elements and the UV rays and the like. Sun bathers are very familiar with trying to block the damaging effects of the Sun’s rays.  This type of element attack can destroy the jacket and the inside jacket.  Suppliers can sell you a plain old PVC indoor cable jacket and in many cases maybe that can be OK with you, but not when you’re running it out side or underground.  A UV rated jacket is also essential as is a Gel filled inside and LLPDE jacket (Linear Low – Density Polyethylene).  It helps protect against moisture, animals, microorganisms and temperature. So, know the downsides be smart and avoid them by using the right materials and the right supplier.

 

 

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Auto & Motor

The old story of the development for Flash storage

It is said that the people who have used this disk are married.


This is one 3.5-inch floppy disk with 1.44 MB only, which was the popular portable storage in the 1980s; however, it even can’t hold one song at present.

In fact, IBM launched the world’s first floppy in 1967. And it is 32 inches in diameter; the size is roughly as big as your computer table.

Alan Shugart launched an 8-inch floppy with 81KB only in 1971. Its size was bigger than our face.

In 1976, Wang An IT Co., Ltd. planned to release the computer for word processing, as they felt the 8-inch floppy disk was too big, so they started cooperating with Shugart Associates to produce smaller disks.

It is said that they decided on the 5.25-inch floppy disk according to the size of the table napkin when they were negotiating in a dark bar in Boston.


The 5.25-inch and 3.5-inch floppy disks are the A and B disks besides the C disk of our computers, which must be read by the special drive.

It is very familiar with the upcoming development of flash disks, the CD soonly replaced the floppy, and then the U disk replaced the CD, becoming the commonly used mobile storage medium.


But no matter floppy disk, CD or USB flash drive, they are all for computers in the office or at home.

Until 1997, Siemens and SanDisk jointly launched an MMC memory card (Multimedia Card), which is only stamp size and can be easily used in various portable electronic devices, including cameras, music players, PDAs (personal digital assistants), e-books, toys, etc. Once launched, it was well accepted.

MMC memory card

Two years later, Matsushita Electric, Toshiba, and SanDisk launched a memory card called “Secure Digital Memory Card” based on the MMC card, which is the 8gb sd card bulk.

SD card

The three companies also jointly founded the SD Association, which is responsible for formulating the industry norms and promoting the use of the SD cards bulk.

In 2003, SanDisk launched one smaller MiniSD card.


MiniSD card

Shortly, SanDisk and Motorola jointly launched the TF memory card that is smaller than the miniSD card.

MicroSD card

In 2005, the TF card was incorporated into the industry standard of the SD Association and renamed as MicroSD card.


Smaller and Smaller SD Card

Since then, with the popularity of mobile terminals, the popularity of Micro SD cards has greatly exceeded the designers’ imagination.

There were more than 700 million Micro SD cards sold worldwide in 2017 only.

The read-write speed and capacity of Micro SD cards are constantly refreshing the upper limit stimulated by strong market demand.

There is no change for the Micro SD size for 13 years so far.

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