Ethernet cables can be wired as straight-through or crossover. The straight-through is the most common type and is used to connect computers to hubs or switches. They are most likely what you will find when you go to your local computer store and buy a patch cable. Crossover cables are more commonly used to connect a computer to a computer and may be a little harder to find since they aren’t used nearly as much as straight-through cable. Then, what’s the difference between them? Difference between straight-through and crossover cables will be introduced in this blog. T568A And T568B Wiring Standard Basis A RJ45 connector is a modular 8 position, 8 pin connector used for terminating Cat5e or Cat6 twisted pair cable. A pinout is a specific arrangement of wires that dictate how the connector is terminated. There are two standards recognized by ANSI, TIA and EIA for wiring Ethernet cables. The first is the T568A wiring standard and the second is T568B. T568B has surpassed 568A and is seen as the default wiring scheme for twisted pair structured cabling. If you are unsure of which to use, choose 568B.  What Is Straight-Through Cable? A straight-through cable is a type of twisted pair cable that is used in local area networks to connect a computer to a network hub such as a router. This type of cable is also sometimes called a patch cable and is an alternative to wireless connections where one or more computers access a router through a wireless signal. On a straight-through cable, the wired pins match. Straight-through cable use one wiring standard: both ends use T568A wiring standard or both ends use T568B wiring standard. The following figure shows a straight-through cable of which both ends are wired as the T568B standard. What Is Crossover Cable? An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly. Unlike straight-through cable, crossover cables use two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. The internal wiring of Ethernet crossover cables reverses the transmit and receive signals. It is most often used to connect two devices of the same type: e.g. two computers (via network interface controller) or two switches to each other. Choose a Straight-Through or Crossover Cable? Usually, straight-through cables are primarily used for connecting unlike devices. And crossover cables are use for connecting unlike devices alike devices. Use straight-through cable for the following cabling:
Use crossover cables for the following cabling:
Conclusion Straight-through and crossover cables are wired differently from each other. One easy way to tell what you have is to look at the order of the colored wires inside the RJ45 connector. If the order of the wires is the same on both ends, then you have a straight-through cable. If not, then it’s most likely a crossover cable or was wired wrong. At present, the straight-through cable is much more popular than crossover cable and is widely used by people. FS.COM provides a full range straight-through Cat5e, Cat6, Cat6a and Cat7 Ethernet patch cables with many lengths and colors options. Look for Ethernet patch cables, just come to FS.COM! Source:http://www.cables-solutions.com/difference-between-straight-through-and-crossover-cable.html
How can we Cabling the Console Connection in this article is explaining how to cabling console connection in PC using switches and USB. The physical console connection, both old and new, uses three main components: the physical console port on the switch, a physical interface on the PC, and a cable that works with the console and serial ports. However, the physical cabling details have changed slowly over time, mainly due to advances and changes with serial interfaces on PC hardware. For this next topic, the text looks at three cases: newer connectors on both the PC and therefore the switch, older connectors on both, and a 3rd case with the newer (USB) connector on the PC but with an older connector on the switch. More modern PC and switch hardware use a well-known standard USB cable for the console connection. Cisco has been including USB ports as console ports in newer routers and switches also . All you’ve got to do is check out the switch to form sure you’ve got the correct sort of USB cable end to match the USB console port. within the simplest form, you’ll use any USB port on the PC, with a USB cable, connected to the USB console port on the switch or router, as shown on the far right side of Figure 6-3.
Older console connections use a PC serial port that pre-dates USB, a UTP cable, and an RJ-45 console port on the switch, as shown on the left side of Figure 6-3. The PC serial port typically has a D-shell connector (roughly rectangular) with nine pins (often called a DB-9). The console port seems like any Ethernet RJ-45 port (but is usually colored in blue and with the word “console” beside it on the switch). The cabling for this older-style console connection are often simple or require some effort, depending on what cable you use. you’ll use the purpose-built console cable that ships with new Cisco switches and routers and not believe the small print . However, you’ll make your own cable with a typical serial cable (with a connector that matches the PC), a typical RJ-45 to DB-9 converter plug, and a UTP cable. However, the UTP cable doesn’t use the same pinouts as Ethernet; instead, the cable uses rollover cable pinouts instead of any of the standard Ethernet cabling pinouts. The rollover pinout uses eight wires, rolling the wire at pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, and so on. because it seems , USB ports became common on PCs before Cisco began commonly using USB for its console ports. So, you also need to be able to use a PC that has only a USB port and not an old interface , but a router or switch that has the older RJ-45 console port (and no USB console port). the middle of Figure 6-3 shows that case. to connect such a PC to a router or switch console, you would like a USB converter that converts from the older console cable to a USB connector, and a rollover UTP cable, as shown within the middle of Figure 6-3. Also Read : How to Configuring Cisco IOS Software The newer 2960-X series, as an example , supports both the older RJ-45 console port and a USB console port. Figure 6-4 points to the 2 console ports; you’d use just one or the opposite . Note that the USB console port uses a mini-B port instead of the more commonly seen rectangular standard USB port.
After the PC is physically connected to the console port, a terminal emulator software package must be installed and configured on the PC. The terminal emulator software treats all data as text. It accepts the text typed by the user and sends it over the console connection to the switch. Similarly, any bits coming into the PC over the console connection are displayed as text for the user to read. The emulator must be configured to use the PC’s interface to match the settings on the switch’s console port settings. The default console port settings on a switch are as follows. Note that the last three parameters are mentioned collectively as 8N1:
Figure 6-5 shows one such terminal emulator. The image shows the window created by the emulator software within the background, with some output of a show command. The foreground, within the upper left, shows a settings window that lists the default console settings as listed just before this paragraph.
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What type of cable would be used to make the connection between the console port of a router and a PC?
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