Topic :UTP & STP cable

• Subrata Paul• Roll :13015411• Semester :1st

• Year :3rd

The following factors should be considered when choosing the type of cable for your network:

• Size - How many nodes (computers) and what are the total distances between them?

• Cost - What is the budget and how much can be spent on cabling?• Reliability - How dependent are your organization’s operations on the

network?• Speed - How many concurrent users are there be and how critical is response

time?• Security - How important is it to protect data from possible interception?• Growth - What are the organization’s plans for growth?• Administration - How will the network be administered?• Electrical Interference - What is the physical environment in which the network

will operate?• Existing Cable - Are there conduits or cabling already in place that might be

useable (e.g., data grade phone lines for UTP)?

Twisted Pair

• A type of cable that consists of two independently insulated wires twisted around one another.

• The use of two wires twisted together helps to reduce crosstalk and electromagnetic induction.

• Twisted pair looks like telephone wire and consists of insulated strands of copper wire twisted together.

Twisted Pair

• There are two versions of twisted pair cable: Shielded Twisted Pair (STP) Unshielded Twisted Pair (UTP).

• STP is commonly used in Token Ring networks and UTP in Ethernet networks where it is referred to as "10baseT.“

• Transmission rates vary between 10-100 Mbps..

Fig : Twisted Pair

Types of Twisted pair

UTP

• Short for unshielded twisted pair, a popular type of cable that consists of two unshielded wires twisted around each other.

• Due to its low cost, UTP cabling is used extensively for local-area networks (LANs) and telephone connections.

• UTP cabling does not offer as high bandwidth or as good protection from interference as coaxial or fiber optic cables.

• But it is less expensive and easier to work with.

What are the key characteristics of UTP (unshielded twisted pair)?

• Transmission rate of 10-100 Mbps• Maximum cable segment of 100 meters• Most susceptible to electrical interference or

‘crosstalk’ (although shielding may lessen the impact)• Less expensive than coax or fiber-optic. In some cases,

preinstalled telephone wire may be used in the network (if it is of sufficient grade).

• Very flexible and easy to work with• Wire type is 22-26AWG• Uses an RJ-45 connector• Ethernet designation is 10baseT

STP• STP short for shielded twisted pair , a type of copper

telephone wiring in which each of the two copper wires that are twisted together are coated with an insulating coating that functions as a ground for the wires.

• The extra covering in shielded twisted pair wiring protects the transmission line from electromagnetic interference leaking into or out of the cable.

• STP cabling often is used in Ethernet networks, especially fast data rate Ethernets.

What are the characteristics of shielded twisted pair (STP)?

• Shielded twisted pair (STP) is similar to UTP except it contains a copper braid jacket to ‘shield’ the wires from electrical interference. It can support transmissions over greater distances than UTP.

UTP Categories• CAT1 is typically telephone wire. This type of wire is not capable

of supporting computer network traffic and is not twisted.It is also used by phone companies who provide ISDN, where the

wiring between the customer's site and the phone company's network uses CAT 1 cable.

• CAT2, CAT3, CAT4, CAT5 and CAT6 are network wire specifications. This type of wire can support computer network and telephone traffic.

• CAT2 is used mostly for token ring networks, supporting speeds up to 4 Mbps. For higher network speeds (100Mbps plus) you must use CAT5 wire, but for 10Mbps CAT3 will suffice.

UTP Categories• CAT3, CAT4 and CAT5 cable are actually 4 pairs of twisted copper

wires and CAT5 has more twists per inch than CAT3 therefore can run at higher speeds and greater lengths.

• The "twist" effect of each pair in the cables will cause any interference presented/picked up on one cable to be cancelled out by the cable's partner which twists around the initial cable. CAT3 and CAT4 are both used for Token Ring and have a maximum length of 100 meters.

• CAT6 wire was originally designed to support gigabit Ethernet (although there are standards that will allow gigabit transmission over CAT5 wire, that's CAT 5e). It is similar to CAT5 wire, but contains a physical separator between the 4 pairs to further reduce electromagnetic interference.

EIA Cable Connectors

• UTP uses a connection called the RJ-45 connector.

• It looks similar to a common telephone connector (RJ-11) except it is slightly larger.

• The RJ-45 has 8 pins while the RJ-11 has only 4.

The following table summarizes the most common types of Ethernet cables, including their maximum data transmission speeds

and maximum bandwidths.

 Category Cable TypeMaximum

Data Transmissio

n Speed

Maximum Bandwidth

Category 3 UTP 10 Mbps 16 MHzCategory 5 UTP 10/100 Mbps 100 MHz

Category 5 e UTP 1000 Mbps 100 MHzCategory 6 UTP or STP 1000 Mbps 250 MHz

Category 6 a STP 10,000 Mbps 500 MHzCategory 7 SSTP 10,000 Mbps 600 MHz

 

UTP

• PROS: Most flexible cheapest cable (but requires expensive support components) easy to install easy to add users may be able to use existing phone cable if data grade

• CONS: Shortest usable cable length susceptible to electrical interference unsecure generally not good for use between buildings

Some utp cables price and Company name

• Lan Cable - High Quality UTPCat6 Cable• Price per Meter : US $0.25-0.75• Dongguan Wider Wire & Cable Co., Limited

• OEM Best Price Outdoor Cat6UTP LAN Bulk Cable 305M 4 Pairs• Price : US $55.1-84• Shenzhen OXO Network Limited

• Network cable utp cat6 cableprice UTP Cat6a BC 4pr 28awg com...• Price : US $0.05-0.28• Shenzhen Mycable Technology Co., Ltd.

Some stp cables price and Company name

• Cat6a/Cat7 STP Patch Cord/Cables• Price : US $0-5• Yuyao Simante Network Communication Equipment Co., Ltd.

• High quality good price hot 4 pair Solid utp/stp/ftp/sftp Cat...• Price : US $14-60• Shenzhen Z-Crown Technology Ltd.

• Best Price Bare Copper NetworkCable STP Lan Cable Cat6a• Price : US $1-10• Dongguan Wider Wire & Cable Co., Limited