Big Dan's Security

Types of Data Transmission Cables

A transmission medium is required to carry information from a source to a destination. The information is usually a signal that has to travel a long distance. For this, the transmission media can be wired or wireless. In wired transmission, the signal travels along the cable from one device to another. But in wireless transmission the electromagnetic waves are transmitted without using a physical conductor. There are three types of cables such as.

1-    Twisted pair cable

2-    Coaxial cable

3-    Fiber optic cable

Twisted-Pair Cable

A twisted pair cable consists of two copper conductors, each one with its own plastic insulation and twisted together. One wire carries the signal and other is used as ground reference. The advantage of twisting is that both wires are equally affected by external influences. So the unwanted signals are canceled out as the receiver calculates the difference between signals in two wires.

This cable is of two types such as.
1- UTP (unshielded twisted pair)
2- STP (shielded twisted pair)

STP cable has one extra metal shield covering the insulated twisted pair conductors. But this is absent in UTP cables. The most common UTP connector is RJ45.

The unshielded twisted pair cable is classified into seven categories based on cable quality. Category 1 of cables is used in telephone lines with data rate around 0.1 Mbps. Whereas Category 5 used in LANs having 100 Mbps data rate.

Performance of twisted-pair cable is measured by comparing attenuation versus frequency. Attenuation increases with frequency above 100 kHz.
These cables are used in telephone lines to provide voice and data channels. DSL lines and Local area networks also use twisted pair cables.

Coaxial Cable
Coaxial cable (coax) carries high frequency signals than twisted-pair cables. Coax has a central core conductor of solid wire enclosed in an insulator, which is covered by an outer conductor of metal foil. This outer conductor completes the circuit. Outer conductor is also enclosed in an insulator, and the whole cable is protected by a plastic cover.

These cables are categorized by RG (radio government) ratings. RG-59 used for Cable TV, RG-58 for thin Ethernet and RG-11 for thick Ethernet. The connector used in these cables is called BNC connector; it is used to connect the end of the cable to a device. 
Though the coaxial cable has higher bandwidth, but its attenuation is much higher compare to twisted-pair cables. It is widely used in digital telephone networks where a single cable can carry data up to 600 Mbps. Cable TV networks use RG-59 coaxial cable. Traditional Ethernet LANs also use this cable.

Fiber-Optic Cable
A fiber optic cable transmits signals in the form of light. Optical fiber use reflection to guide light through a channel. It consists of two main parts: core and cladding. Core is denser compare to cladding and is made up of plastic or glass. Cladding acts as a protective cover to core. The difference in density of core and cladding is such that a beam of light moving through the core is reflected off the cladding, instead of being refracted into it.

Two modes of propagation of light are possible in optical fiber such as: multimode and single mode. Multimode fiber allows multiple beams from a light source move through the core. In multimode step-index fiber, the core density remains constant from the center to the edges. But in multimode graded-index fiber, core density gradually decreases from the center of the core to its edge. Graded-index fiber creates less distortion in the signal compare to step-index.

There are two types of connectors for fiber optic cables. The SC connector is used for cable TV, and ST connector used for connecting cable to networking devices. Attenuation in fiber optic cable is very low compare to other two types of cable. It provides very high bandwidth and immunity to electromagnetic interference. Light weight and greater immunity to tapping makes it more preferable cable.

Fiber optic cable is often used in backbone networks because of its wide bandwidth and cost effectiveness. Local area networks such as 100Base-FX network and 100Base-X use this cable. Also it is used by cable TV companies.

http://engineering360.blogspot.com/2009/10/types-of-data-transmission-cables.html

About the Author

I am a freelance blogger. I publish articles on subjects like education,computers, technology, Internet, SEO, blogging and online jobs. you can visit my site at http://www.engineering360.blogspot.com/

CT-NT006 cable tester BNC/RJ45

US Auctions Australian Auctions Austrian Auctions Belgian Auctions Canadian Auctions French Auctions German Auctions Irish Auctions Italian Auctions Dutch Auctions Spanish Auctions Swiss Auctions GB Auctions

Best Match Items Ending First Newly-Listed Items First Price + Shipping: Lowest First Price + Shipping: Highest First

50 BNC COMPRESSION COAX CONNECTOR RG59 Cable Cctv MALE $27.50 Time Remaining: 19d 15h 54m Buy It Now for only: $27.50 Buy It Now

21002150 Security Camera BNC RCA Video Power Cable DVR CCTV Wire Cord CLA $57.99 Time Remaining: 1h 12m

New Security Camera Video Audio Power Cable BNC RCA 50ft for CCTV DVR System 3JC $10.99 Time Remaining: 1h 15m

Q See QS100B 4 PACK 100 Ft BNC Extension Cable $45.00 Time Remaining: 29d 37m Buy It Now for only: $45.00 Buy It Now

6 150 Ft Audio Video Power Cable CCTV Dvr Security Camera BNC RCA Wire New CKQ $106.99 Time Remaining: 1h 21m

100 BNC COMPRESSION COAX CONNECTOR RG59 CABLE CCTV MALE $53.50 Time Remaining: 19d 16h 1m Buy It Now for only: $53.50 Buy It Now

6 100ft Security Camera Audio Video Power Cable BNC RCA CCTV Surveillance CLM $79.98 Time Remaining: 49m

4 New 50ft CCTV Security Camera Cable DVR BNC Wire b3t $24.95 Time Remaining: 19d 1h 30m Buy It Now for only: $24.95 Buy It Now

2 X 60ft Cctv Bnc Female RCA Male Cable Video or Audio $18.99 Time Remaining: 2h 3m

100ft CCTV CCD Camera Video Power Cable BNC RCA DVR $10.99 Time Remaining: 2d 22h 39m Buy It Now for only: $10.99 Buy It Now

2 X 60ft CCTV BNC Video Security Camera Cable w Power $20.99 Time Remaining: 2h 3m

Power Video Audio Surveillance Camera Cable BNC RCA CCTV Home Security 100ft C15 $12.45 Time Remaining: 6d 4h 14m Buy It Now for only: $12.45 Buy It Now

2 X 60ft CCTV BNC Video 12v Power Security camera cable $19.99 Time Remaining: 2h 3m

4x 50ft Security Camera CCTV DVR Surveillance Video Power Cable BNC RCA Wire B80 $24.95 Time Remaining: 11d 23h 47m Buy It Now for only: $24.95 Buy It Now

New Security Camera Video Audio Power Cable BNC RCA 50ft for CCTV DVR System 3JC $10.99 Time Remaining: 2h 22m

100 ft Security CCTV Surveillance Camera Premade BNC Video Power Siamese Cable $12.59 Time Remaining: 21d 18h 34m Buy It Now for only: $12.59 Buy It Now

2X 120ft CCTV BNC Video 12v Power Security camera cable $29.99 Time Remaining: 2h 3m

100ft BNC Surveillance Security CCTV Camera Video Power Cable Extension Wire BP9 $10.99 Time Remaining: 29d 7h 48m Buy It Now for only: $10.99 Buy It Now

New 3x 150ft Audio Video Power Cable Security Camera BNC RCA CCTV DVR Wire CLH $54.99 Time Remaining: 2h 35m

4 New 100ft BNC CCTV Video Power Cable CCD Security Camera DVR Wire Cord b3n $33.99 Time Remaining: 12d 40m Buy It Now for only: $33.99 Buy It Now

16x 50ft Audio Video Power Cable BNC RCA for CCTV Security Camera DVR System CLK $127.99 Time Remaining: 2h 48m

2x 100ft Video Power Security Camera BNC Cable CCTV DVR Surveillance Wire b98 $20.45 Time Remaining: 14d 7h 9m Buy It Now for only: $20.45 Buy It Now

New Security Camera Video Audio Power Cable BNC RCA 50ft for CCTV DVR System 3JC $10.99 Time Remaining: 2h 56m

3 New 100ft BNC CCTV Video Power Cable CCD Security Camera DVR Wire Cord 3QB $26.99 Time Remaining: 6d 11m Buy It Now for only: $26.99 Buy It Now

Power Video Audio Surveillance Camera Cable BNC RCA CCTV Home Security 100ft C15 $12.45 Time Remaining: 1h 29m

100ft CCTV BNC Video Power Cable DVR Surveillance Security Camera Wire Cord b3f $10.99 Time Remaining: 19d 4h 24m Buy It Now for only: $10.99 Buy It Now

BNC Male DVR CCTV Camera Video Black Power Cable 40 $3.78 Time Remaining: 2h 28m

Surveillance Security CCTV Camera Video Power Cable Extension Wire 100ft BNC 3je $10.99 Time Remaining: 12d 5h 23m Buy It Now for only: $10.99 Buy It Now

New Security Camera Video Audio Power Cable BNC RCA 50ft for CCTV DVR System 3JC $10.99 Time Remaining: 4h 9m

4 50 FT CCTV Power Video Siamese Cable BNC with RG59U $37.99 Time Remaining: 23d 17h 53m Buy It Now for only: $37.99 Buy It Now

16x 150 BNC Video Power Cable DVR CCTV Security Camera Surveillance Wire CLD $229.90 Time Remaining: 5h 15m

BNC Male to F type Female Connector Adapter for RG6 RG59 CableABNC1 F2 $1.98 Time Remaining: 29d 40m Buy It Now for only: $1.98 Buy It Now

16x 150ft Security Camera Audio Video Power Cable CCTV Surveillance BNC RCA B50 $259.98 Time Remaining: 1h 55m

4 x 25 FT CCTV Power Video Siamese Cable BNC with RG59 $29.99 Time Remaining: 3d 14h 43m Buy It Now for only: $29.99 Buy It Now

New Security Camera Video Audio Power Cable BNC RCA 50ft for CCTV DVR System 3JC $10.99 Time Remaining: 4h 59m

20X RCA to BNC Connector F M M FAdapter Coax Cable $6.67 Time Remaining: 23d 2h 32m Buy It Now for only: $6.67 Buy It Now

2x 50 2x 100ft CCTV DVR CCD Security Camera Video Audio Power Cable BNC RCA CLG $40.99 Time Remaining: 5h 17m

3100feet BNC RCA CCTV Video Power Cable CCD Security Camera Extension Cord 1QB $26.99 Time Remaining: 10d 7h 17m Buy It Now for only: $26.99 Buy It Now

CCTV Camera 3 in 1 DC RCA BNC Power Audio Video Cable $5.62 Time Remaining: 1h 43m

25 ft Siamese Surveillance Cctv Camera BNC Cable $8.92 Time Remaining: 7d 21h 31m Buy It Now for only: $8.92 Buy It Now

100ft BNC Surveillance Security CCTV Camera Video Power Cable Extension Wire BP9 $10.99 Time Remaining: 19h 19m

50 ft Security CCTV Surveillance Camera Premade BNC Video Power Siamese Cable $8.99 Time Remaining: 21d 18h 32m Buy It Now for only: $8.99 Buy It Now

3100feet BNC RCA CCTV Video Power Cable CCD Security Camera Extension Cord 1QB $26.99 Time Remaining: 5h 9m

3x 100ft BNC Video Power Cable Security Camera CCTV DVR Surveillance Wire b3p $26.99 Time Remaining: 27d 56m Buy It Now for only: $26.99 Buy It Now

6x 50 Feet Video Audio Power Cable BNC RCA Surveillance Security Camera Wire CKV $52.99 Time Remaining: 2h 21m

150ft CCTV DVR Surveillance Security Camera Extension BNC Video Power Cable B7V $19.99 Time Remaining: 29d 9m Buy It Now for only: $19.99 Buy It Now

8x66ft CCTV DVR Security Camera Power Video Cable Home Wire BNC Surveillance CBK $59.96 Time Remaining: 5h 31m

8x100ft BNC CCTV Security Surveillance Camera Cable 1JF $66.95 Time Remaining: 19d 5h 9m Buy It Now for only: $66.95 Buy It Now

100 Feet Bnc Premade Cable Video Power Cables for CCTV Cameras DVRs 4 pcs White $44.98 Time Remaining: 5h 41m Buy It Now for only: $49.98 Buy It Now

12ft BNC male to RCA male video CCTV camera cable cord $5.99 Time Remaining: 24d 23h 5m Buy It Now for only: $5.99 Buy It Now

3x 66 ft Power Video CCTV DVR BNC Security Surveillance Wire Camera Cable DC C82 $26.99 Time Remaining: 5h 33m

Petra C1701B/Bk/25' RG59 Coaxial Cable with BNC Plugs (25 Feet) Sale Price: $6.51   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description 25 foot RG59 coaxial cable with bnc plugs.

VideoSecu 100 Feet Video Power BNC RCA Cable for CCTV Security Cameras 1JE List Price: $35.99 Sale Price: $13.69 You save: $22.30 (62%)   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description Use with Closed Circuit Television (CCTV) applications and security camera components. This pre-terminated CCTV cable is perfect for transmitting video and power. Simplify the installation of surveillance systems by using one cable to carry video and power...

VideoSecu 150 Feet Audio Video Power Security Camera Cable with BNC RCA Adaptor 3JH Sale Price: $15.99   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description Use with Closed Circuit Television (CCTV) applications and security camera components. This pre-terminated CCTV cable is perfect for transmitting audio video and power. Simplify the installation of surveillance systems by using one cable to carry audio video and power...

BNC to BNC Cable List Price: $3.95 Sale Price: $3.52 You save: $0.43 (11%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description BNC Cable

Garmin MCX to BNC adapter cable List Price: $25.00 Sale Price: $15.27 You save: $9.73 (39%)   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description Garmin MCX to BNC Cable Adapter 010-10121-00 Cable Adapters

Steren - Network cable - BNC (M) - BNC (M) - 3 ft - coaxial - ( RG-59 ) - stranded List Price: $5.95 Sale Price: $3.99 You save: $1.96 (33%)   Eligible for free shipping! Availability: Usually ships in 2-3 business days See Reviews For This Product Description Steren 205-521 BNC Coaxial RG-59 Cable

Paladin Tools 70052 Compression Crimper for RCA, BNC and F Connectors List Price: $28.41 Sale Price: $21.15 You save: $7.26 (26%)   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description Compression Crimper

NEW BNC - BNC RG59/U Cable, 50 ft (Solid Core) (Coaxial Cable) Sale Price: $26.73   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description BNC - BNC RG59/U Cable, 50 ft (Solid Core)

SWANN SW271-S15 BNC SIAMESE CABLES (50-FT) Sale Price: $23.72   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description BNC TO BNC CABLE; DOUBLE SHIELDED WITH ALUMINUM FOIL INSULATION PLUS BRAIDING; DC POWER CABLE (TEAR-AWAY) INTEGRATED WITH COAXIAL; INCLUDES MALE & FEMALE DC CONNECTORS & MALE-TO-MALE BNC RG59 CONNECTORS; DIELECTRIC INSULATION FOR REDUCED MAGNETIC FIELDS ON YOUR MONITOR; WEATHERPROOF DESIGN; 50 FT

Samsung Continuum i400 External Battery Charger w/ OEM Standard Battery List Price: $39.99 Sale Price: $22.02 You save: $17.97 (45%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days See Reviews For This Product Description More value and more talk time are yours with this economical battery charger kit! The Kit includes a spare battery, a versatile battery-only charging cradle and a Y-Cable that allows you to charge your spare battery and phone simultaneously! Cradle is designed to conveniently hold your phone for easy viewing...