In this video we're going to talk about the different types of connectors that are used in networking.

在本視頻中，我們將討論網絡中使用的不同類型的連接器。

And these connectors will vary depending upon the type of network and the cable that they are attached to.

這些連接器會因網絡類型和所連接的電纜而異。

Whether that cable is twisted pair, coaxial, telephone, or fiber optic.

無論是雙絞線、同軸電纜、電話電纜還是光纖電纜。

And the first one we're going to talk about is the RJ45.

我們首先要討論的是 RJ45。

Now the RJ45 is by far the most common network connector.

目前，RJ45 是最常見的網絡連接器。

Now this is an 8-pin connector that's used to connect computers and other network devices in a local area network.

這是一個 8 針連接器，用於連接局域網中的計算機和其他網絡設備。

The RJ45 is used with unshielded twisted pair cable.

RJ45 用於非屏蔽雙絞線。

Twisted pair cable has eight wires and these wires are arranged in a certain order and then the wires are inserted into an RJ45 connector and then they are crimped on both ends using a wire crimper.

雙絞線有 8 根導線，這些導線按一定順序排列，然後將導線插入 RJ45 連接器，再用壓線鉗將導線兩端壓接。

And then one connector will be plugged in to the computer's network card and then the other end would plug into a device such as a switch, modem, or a router.

然後將一個連接器插入電腦網卡，另一端插入交換機、調制解調器或路由器等設備。

Then once that is done, the computer will be able to connect to a network.

完成上述操作後，電腦就可以連接網絡了。

The RJ45 has a single locking tab that locks itself into place.

RJ45 有一個單獨的鎖片，可自行鎖定到位。

Now this is a UTP coupler.

這是一個 UTP 耦合器。

Now this is not really a connector.

這不是一個真正的連接器。

This is used for connecting UTP cables with RJ45 connectors to each other.

用於將帶有 RJ45 接頭的 UTP 電纜相互連接。

This is typically used when running a longer cable is not an option.

這通常用於無法使用較長電纜時。

It's just used to extend a network cable by joining two cables together using their RJ45 connectors.

它只是通過使用 RJ45 接頭將兩根電纜連接在一起來延長網線。

So you would just plug one end of the cable into the coupler and then you would plug in another cable on the other side.

是以，您只需將電纜的一端插入耦合器，然後在另一端插入另一根電纜即可。

And now you have successfully extended your UTP cable.

現在，您已經成功延長了 UTP 電纜。

And another type of connector that is similar to the RJ45 is the RJ48.

另一種與 RJ45 相似的連接器是 RJ48。

Now the RJ48 looks very similar to the RJ45, but the difference between the two is that the RJ48 is used with shielded twisted pair cable instead of unshielded twisted pair that's used with the RJ45.

現在，RJ48 看起來與 RJ45 非常相似，但兩者之間的區別在於，RJ48 使用的是屏蔽雙絞線，而不是 RJ45 使用的非屏蔽雙絞線。

The RJ48 is primarily used with T1 lines and it's also wired differently than the RJ45.

RJ48 主要用於 T1 線路，其佈線方式也與 RJ45 不同。

And this is the RJ11 connector.

這是 RJ11 連接器。

This is a 4-wire connector that's mainly used to connect telephone equipment.

這是一個 4 線連接器，主要用於連接電話設備。

But as far as networking, the RJ11 is used to connect computers to a local area network through the computer's modem.

但就聯網而言，RJ11 用於通過計算機的調制解調器將計算機連接到局域網。

The RJ11 locks itself into place by a single locking tab and it resembles the RJ45, but it's a little bit smaller.

RJ11 通過單個鎖片鎖定到位，與 RJ45 相似，但尺寸稍小。

The BNC connector is a type of RF connector that is used with coaxial and digital video transmissions as well as audio.

BNC 連接器是一種射頻連接器，用於同軸和數字視頻傳輸以及音頻傳輸。

Now these connectors are not very common anymore, but they can still be found on older networks.

現在，這種連接器已不常見，但在老式網絡中仍能找到。

Now there are many different kinds of BNC connectors.

現在，BNC 連接器有很多種。

So for example here is a BNC-T connector which connects three coaxial cables together.

例如，這裡有一個 BNC-T 連接器，可將三根同軸電纜連接在一起。

And there is also the BNC coupler which is used to connect two coaxial cables together.

還有一種 BNC 耦合器，用於將兩條同軸電纜連接在一起。

And there is also the BNC terminator which is used to terminate the ends of a cable.

還有一種 BNC 端接器，用於端接電纜的兩端。

Now this connector is called the F-type.

現在，這種連接器被稱為 F 型。

Now this is a threaded connector typically used on coaxial cables.

這是一種螺紋連接器，通常用於同軸電纜。

These are primarily used by cable providers to attach to cable modems.

這些設備主要由電纜供應商用於連接電纜調制解調器。

So if you have broadband cable like I do, you will have a modem with a coaxial cable attached to an F-type connector that screws into the back of your modem that attaches with a nut.

是以，如果您像我一樣使用寬帶電纜，您的調制解調器上會有一根同軸電纜，連接到一個 F 型連接器上，該連接器擰在調制解調器的背面，用螺母固定。

And in addition to being used with broadband cable, they are also used with satellite internet.

除了與寬帶電纜一起使用外，它們還與衛星互聯網一起使用。

And there is also the USB connector.

此外，還有 USB 接口。

The USB is very common on desktops and laptops.

USB 在臺式機和筆記本電腦上非常常見。

And because Universal is in its name, it can be used for many different purposes including networking.

由於其名稱中包含了 Universal 字樣，是以可用於包括聯網在內的多種不同用途。

So for example many manufacturers make USB wireless adapters that plug into a USB port on a computer to give the computer wireless network access.

例如，許多製造商生產的 USB 無線適配器可以插入電腦的 USB 端口，為電腦提供無線網絡接入。

And there is also wired network adapters like this one here, where you would plug an ethernet cable at one end and then the other end into a USB port on a computer.

此外，還有像這樣的有線網絡適配器，一端插入以太網電纜，另一端插入電腦的 USB 端口。

And then the computer will be able to access a network through its USB port.

然後，電腦就能通過 USB 端口訪問網絡了。

So now we're getting into fiber optic connectors.

現在我們開始使用光纖連接器。

Now fiber optic networks use pulses of light to send data.

現在，光纖網絡使用光脈衝來發送數據。

And there are many different types of fiber optic connectors.

光纖連接器的類型也多種多樣。

But I'm only going to talk about the most popular fiber connectors.

但我只想談談最常用的光纖連接器。

But the main differences between these fiber connectors are the size and the method they use when coupling.

但這些光纖連接器的主要區別在於尺寸和耦合方法。

So the first fiber optic connector is called the standard connector.

是以，第一個光纖連接器被稱為標準連接器。

And this is often called the square connector.

這通常被稱為方形連接器。

And this was one of the first connectors to be used in the marketplace.

這也是市場上最早使用的連接器之一。

This uses a push-pull connector similar to audio and video plugs.

它使用類似於音頻和視頻插頭的推拉式連接器。

And these are commonly used between floors in a building.

這些設備通常用於建築物的樓層之間。

This connector is called the MTRJ, which stands for mechanical transfer register jack.

這個連接器被稱為 MTRJ，代表機械傳輸寄存器插孔。

And this is a fiber optic connector that uses a latched push-pull connection.

這是一個光纖連接器，採用鎖定式推拉連接。

It has a small form factor that's used for high pack density.

它的外形小巧，用於高密度封裝。

And it was designed to replace the SC connector.

它的設計目的是取代 SC 連接器。

The MTRJ uses two fibers in a single design and it resembles the RJ45.

MTRJ 在單一設計中使用兩條光纖，與 RJ45 相似。

This connector is becoming increasingly popular in fiber networks today.

如今，這種連接器在光纖網絡中越來越受歡迎。

And our next fiber connector is called the LC or local connector or Lucent connector since it was developed by Lucent.

我們的下一個光纖連接器稱為 LC 或在地連接器或朗訊連接器，因為它是由朗訊公司開發的。

Now this type of connector is also commonly used between floors in a building.

現在，這種連接器也常用於建築物的樓層之間。

And it was designed to compete with the SC connector.

它的設計目的是與 SC 連接器競爭。

It's about half the size of the SC connector which makes it better for highly populated racks and panels.

它的尺寸約為 SC 連接器的一半，是以更適用於高度密集的機架和麵板。

And this also uses a latch that locks itself into place similar to the RJ45.

此外，它還使用了與 RJ45 類似的閂鎖。

And our last fiber optic connector is called the ST or straight tip.

最後一種光纖連接器稱為 ST 或直頭。

Now this uses a half twist bayonet type of lock and is commonly used with single mode fiber optic cable.

現在，它使用的是半擰卡口式鎖，通常與單模光纜一起使用。

Now this is a large size connector that was developed by AT&T.

這是 AT&T 開發的一款大型連接器。

And because of its large size, its usage has declined in favor of smaller connectors such as the LC and the MTRJ.

由於其體積龐大，其使用率已經下降，轉而使用 LC 和 MTRJ 等較小的連接器。

Now just like UTP couplers, there are also fiber couplers.

就像 UTP 耦合器一樣，現在也有光纖耦合器。

So if you wanted to join two fiber optic connectors, you would use a fiber coupler.

是以，如果要連接兩個光纖連接器，就需要使用光纖耦合器。

Now fiber couplers are used to join or couple two of the same fiber optic connectors.

現在，光纖耦合器用於連接或耦合兩個相同的光纖連接器。

And the two connectors have to be the same.

而且兩個連接器必須相同。

Now these are not to be confused with fiber adapters.

不要把它們與光纖適配器混為一談。

Because fiber adapters are used for joining two different connectors together.

因為光纖適配器用於將兩個不同的連接器連接在一起。

So here we have an example of a fiber coupler joining two ST connectors together.

是以，這裡有一個光纖耦合器將兩個 ST 連接器連接在一起的例子。

So now we're going to talk about the difference between UPC and APC end faces or tips on fiber optic connectors.

現在我們來談談 UPC 和 APC 端面或光纖連接器端頭的區別。

And as examples, we're going to use a group of ST fiber connectors equipped with UPC and APC end faces.

作為示例，我們將使用一組配有 UPC 和 APC 端面的 ST 光纖連接器。

Now when fiber optic connectors make a connection to each other, the point at which the connection is made is not perfect because of the small imperfections of the flat surfaces.

現在，當光纖連接器相互連接時，由於平面的微小瑕疵，連接點並不完美。

So what happens is at the point where the connectors join, light is transmitted from one connector to the other connector.

是以，在連接器連接處，光線會從一個連接器傳輸到另一個連接器。

But at the point where light passes to the other connector, the light will reflect back in the opposite direction towards the light source.

但在光線通過另一個連接器時，光線會反向反射回光源。

And when this happens, there is signal loss.

一旦出現這種情況，信號就會丟失。

And this is what happens in UPC connectors.

這就是 UPC 連接器中發生的情況。

The light is reflected directly back.

光線會直接反射回來。

So as technology progressed, a new signal loss.

是以，隨著技術的進步，新的信號丟失。

And this new connector is called the APC connector.

這種新的連接器被稱為 APC 連接器。

Now the difference between the UPC and the APC is the angle of the end face or tip where the connection is made.

現在，UPC 和 APC 的區別在於連接端面或尖端的角度。

So as I said before, with the UPC, the light reflects back towards the light source.

是以，正如我之前所說，使用 UPC 時，光線會反射回光源。

But with the APC, with its angled connection, the light doesn't reflect back towards the light source.

但 APC 採用斜角連接，光線不會反射回光源。

It reflects back at an angle into the wall of the cable.

它以一定角度反射回電纜壁。

And as a result, this greatly reduces the signal loss.

是以，這大大減少了信號損失。

So thank you everyone for watching this video on network connectors.

感謝大家觀看這段關於網絡連接器的視頻。

Please subscribe, follow me on Twitter, and thank you for watching.

請訂閱，在 Twitter 上關注我，感謝您的收看。