Tag Archives: UTP cable

What Are Fiber Optic Cable, Twisted Pair Cable and Coaxial Cable?

In a communication system, a wire or cable is usually used to connect transmitting and receiving devices. Currently in the market, there are mainly three types of cables deployed in communication systems, which are fiber optic cables, twisted pair cables and coaxial cables. Each type has been widely utilized and applied in different applications. What are they? How much do you know about them? And what’s the difference between these three kinds of cables? This article will give you the answers.

Fiber Optic Cables

Computing and data communications are fast-developing technologies. To meet the transmission of ever-increasing data rates, there comes a new generation of transmission medium, which is fiber optic cable. Fiber optic cable transmits information using beams of light at light speed rather than pulses of electricity. It refers to the complete assembly of optical fiber. A fiber optic cable can contain one or more strands of optical fiber to transmit data. Each strand of optical fiber is individually coated by plastic layers and contained in a protective tube. Fiber optic cable transmits data as pulses of light go through tiny tubes of glass, the transmission capacity of which is 26,000 times higher than that of twisted-pair cable. When comparing with coaxial cables, fiber optic cables are lighter and more reliable for transmitting data.

Two widely used types of fiber optic cables are single-mode fiber optic cables and multimode fiber optic cables. A single-mode optical fiber has a small core, and only allows one mode of light to propagate at a time. It is generally adapted to high speed and long-distance applications. A multimode optical fiber has a larger core diameter than a single-mode optical fiber and it is designed to carry multiple light rays, or modes at the same time. It is mostly used for communication over short distances because of its high capacity and reliability, serving as a backbone applications in buildings. And there are many connector types for fiber optic cable, such as LC, SC, ST or FC connector. You can choose fiber optic cables terminated at both ends with the same or different connector types to connect different devices, like LC SC fiber patch cable, LC to LC fiber patch cable. There are both single-mode and multimode, and simplx and duplex fiber optic patch cables for your options, such as LC to LC multimode duplex fiber optic patch cable, LC to SC duplex single-mode fiber optic patch cable, or LC LC multimode fiber patch cord.

Singlemode-vs-Multimode-Fiber-Optic-Cable-624x362

Twisted Pair Cables

Twisted pair cable consists of a pair of insulated wires twisted together, which has been adapted in the field of telecommunication for a long time. With the cable twisting together, it helps to reduce noise from outside sources and crosstalk on multi-pair cables. Basically, twisted pair cable can be divided into two types: unshielded twisted-pair (UTP) cable and shielded twisted-pair (STP) cable. UTP cable, such as data communication cables and normal telephone cables, serves as the most commonly used cable type with merely two insulated wires twisted together. STP cable distinguishes itself from UTP cable in that it includes a foil jacket which helps to prevent crosstalk and noise from outside source. STP cable is typically used to eliminate inductive and capacitive coupling, and it can be applied between equipment, racks and buildings. The table below shows several different types of twisted pair cables.

Twisted-Pair-Cables

Coaxial Cables

Coaxial cable is a type of high-frequency transmission cable which contains a single solid-copper core. A coaxial cable has over 80 times the transmission capability of the twisted-pair cable. Coaxial cables are commonly used to deliver television signals and to connect computers in a network as well. There are mainly two kinds of coaxial cables: 75 Ohm coaxial cable and 50 Ohm coaxial cable.

75 Ohm coaxial cable

The primary use of 75 Ohm coaxial cables is to transmit video signals. One typical application of 75 Ohm coaxial cable is to transmit television signals over cable, which is why sometimes it is called signal feed cables. The most common connector type used in this application is a Type F. Another application is video signals between components, such as DVD players, VCRs or receivers commonly known as audio/video (A/V) cables. In this case, BNC and RCA connectors are often found. In both applications, RG59 with both solid center conductor (RG59B/U) and stranded center conductor (RG59A/U) as well as RG6 are common choices.

75-Ohm-coaxial-cable

50 Ohm coaxial cable

The primary use of 50 Ohm coaxial cables is the transmission of data signals in a two-way communication system. Several common applications for 50 Ohm coaxial cables are computer ethernet backbones, wireless antenna feed cables, GPS (Global Positioning Satellite) antenna feed cables and cell phone systems.

50-Ohm-coaxial-cable

Conclusion

As we know, the technology in the field of communication networks is developing rapidly. All these three kinds of cables have their special applications. Twisted pair cable has been adapted in the field of telecommunication for a long time. Coaxial cables are commonly used to deliver television signals and to connect computers in a network. And fiber optic cable is a new generation of transmission medium. Before making a decision, you need to know more about them, which can help you make a better choice.

1000BASE-T vs 1000BASE-TX

Networking may be straightforward, but the world of networking terminology is not. Even when you’ve been steeped in business of Ethernet for many years, you may still get confused by some of the terms. What are 1000BASE-T and 1000BASE-TX and the difference between them? In this post, this Ethernet network naming convention will be tackled.

What Are 1000BASE-T and 1000BASE-TX?

1000BASE-T and 1000BASE-TX, their names share a lot in common, except that the latter has one more letter “X”. What do they mean? The “1000” refers to the transmission speed of 1000 Mbps. The “BASE” refers to BASEband signaling, which means that only Ethernet signals are being carried on the medium. The “T” refers to the twisted pair cables that the technology uses. 1000BASE-T is a shorthand designation by the Institute of Electrical and Electronics Engineers (IEEE). The standard is designated as IEEE 802.3ab and allows 1 Gbps data to transfer for distances of up to 100 meters.

1000BASE-TX is a physical layer standard similar to 1000BASE-T created and managed by Telecommunications Industry Association (TIA). It also referred to as TIA/EIA 854. 1000BASE-TX enables transmitting data at speeds of gigabits per second for up to 100 meters in length and is also maintained under the IEEE 802.3ab standard. 1000BASE-T and 1000BASE-TX are both types of gigabit Ethernet networking technology that uses copper cables as a medium.

How 1000BASE-T and 1000BASE-TX Work?

1000BASE-T is normally implemented using four pairs of the commonly installed Category 5 (Cat 5) unshielded twisted pair (UTP) cable or enhanced Cat 5 cabling version of UTP cable to achieve gigabit data rates. Transmitting a 1000 Mb/s data stream over four pairs of Cat 5 twisted pair cables presents several design challenges to both the transmission system designer and standards developer. The challenges are due to signal attenuation, echo, return loss, and crosstalk characteristics of cables, as well as electromagnetic emissions and susceptibility. The 802.3ab standards specify special filters for hybrid circuits used in full-duplex transmission over single wires, a special five-level pulse amplitude modulation (PAM) encoding mechanism instead of binary signals, forward error correction techniques, and pulse shaping technologies to make 1000BASE-T a functional and reliable networking technology. The following picture shows 1000BASE-T.

1000base-t

As opposed to the four pairs of wires used in 1000BASE-T networks, 1000BASE-TX uses two pairs of wires for data transmission which enables transmitting data at speeds of 500 Mbps on Category 6 or 7 UTP cables. The following picture shows 1000BASE-TX.

1000base-tx

What Are the Differences Between Them?

1000BASE-T can be used in data centers for fast server switching or in desktop PCs for broadband applications. The biggest advantage of 1000BASE-T is that it can use existing copper cabling, negating the need to rewire the system with newer optical fiber cables. However, 1000BASE-TX requires Cat 6 or 7 cabling. The design of 1000BASE-TX does not require hybrids, nor does it necessitate echo cancellation, so its electronics can be much less expensive than comparable 1000BASE-T electronics. Though 1000BASE-TX enables the building of devices with less circuitry to support, it has not been as commonly used as 1000BASE-T, due to the high cost of Cat 6 and 7 cable requirements and the falling cost of 1000BASE-T products.

1000BASE-T and 1000BASE-TX are different standards. As a result, they have different connection requirements. For each of them, there are various kinds of compatible SFP copper transceiver modules For example, compatible SFP copper transceiver modules like QFX-SFP-1GE-T, FCLF-8520-3, and HP JD089B are for 1000BASE-T network connection; and compatible SFP copper transceiver module like Cisco GLC-T is for 1000BASE-TX network connection.

1000BASE-T Technology—Gigabit Ethernet over Copper

The following picture shows a GLC-T compatible 1000BASE-T copper SFP transceiver module. Looking at it, you may ask: what is 1000BASE-T? As a member of the Gigabit Ethernet family of standards, 1000BASE-T came into wide use in 1999, gradually replacing fast Ethernet. Equipment and cables are very similar to previous Ethernet standards. By 2011, it has been very common and economical. In this post, some detailed information about 1000BASE-T will be shown.

GLC-T transceiver module

1000BASE-T Definition

1000Base-T is a shorthand designation by the Institute of Electrical and Electronics Engineers (IEEE). The “1000” refers to the transmission speed of 1000 Mbps. The “BASE” refers to baseband signalling, which means that only Ethernet signals are being carried on the medium. The “T” refers to the twisted pair cables that the technology uses (e.g. the common category 5 in use today). 1000Base-T is a type of gigabit Ethernet networking technology that uses copper cables as a medium. The standard is designated as IEEE 802.3ab and allows 1 Gbps data to transfer for distances of up to 100 meters.

How 1000BASE-T Works

1000BASE-T—How does it work? This section provides a brief overview of the technical foundations to 1000BASE-T.

1000Base-T is an extension of standard Ethernet technologies to gigabit-level network speeds. 1000Base-T is normally implemented using four pairs of the commonly installed category 5 unshielded twisted pair (UTP) cable or enhanced category 5 cabling version of UTP cabling to achieve gigabit data rates. 1000Base-T uses all four pairs of wires in standard UTP cabling, as opposed to the two pairs of wires used in 10BaseT and 100BaseT networks. Transmitting a 1000 Mb/s data stream over four pairs of category 5 twisted pair cables presents several design challenges to both the transmission system designer and standards developer. The challenges are due to signal attenuation, echo, return loss, and crosstalk characteristics of cables, as well as electromagnetic emissions and susceptibility. The 802.3ab standards specify special filters for hybrid circuits used in full-duplex transmission over single wires, a special five-level pulse amplitude modulation (PAM) encoding mechanism instead of binary signals, forward error correction techniques, and pulse shaping technologies to make 1000Base-T a functional and reliable networking technology. The picture below shows a UTP cable.

UTP cable

Applications and Advantages of 1000BASE-T

1000BASE-T can be used in data centers for server switching, for uplinks from desktop computer switches, or directly to the desktop for broadband applications. It is intended mainly for connecting high-speed hubs, Ethernet switches, and routers together in wiring closets; for switch-switch connections in backbones; for switch-server connections; and for horizontal cable runs to high-speed workstations. The biggest advantage of 1000Base-T is that the existing copper cabling can be used, negating the need to rewire the system with newer optical fiber cables. Other 1000Base-T benefits include compatibility with existing network protocols (such as IP, IPX, and AppleTalk), network management platforms and applications.

Fiberstore is a professional manufacturer and supplier for optical fiber products and provides various kinds of 1000Base-T SFP transceivers like HP JD089B compatible SFP copper transceiver module, FCLF-8520-3 compatible SFP copper transceiver module, and QFX-SFP-1GE-T compatible SFP copper transceiver module, branded by many famous companies, such as Cisco, Finisar, Juniper, and HP. Those 1000Base-T SFP transceivers are compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE 802.3z and 802.3ab.