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Cabling Information

Ethernet Wire Map
 
This test is to ensure that the two ends have been terminated pin for pin, i.e. that pin 1 at the patch panel goes to pin 1 at the outlet, pin 2 goes to pin 2 etc. etc. The wire map also checks for continuity, shorts, crossed pairs, reversed pairs and split pairs. A Split pair is probably the only thing that requires an explanation here, as they are undetectable with a simple continuity tester, this is because pin for pin they seem to be correct. As explained on the Cabling Basics page, balanced line operation requires that the signal is transmitted over a pair of wires that are twisted together, with a 'split pair' the signal would be split between two different pairs.

 

Cabling Types

Null Modem Cables
A null modem cable connects two standard serial ports for the purpose of computer-to-computer networking. Null modem cables enable data transfer between two computers with a minimum of setup required. This technology is also used in the UNIX and Linux arena for printing purposes.

Leased Line
A leased line is a cable connecting two specific locations for voice and/or data network service. Leased lines most commonly are rented by businesses to connect branch offices.
 
RJ-45 Connectors and Cables
RJ45 is a standard type of connector for network cables such as those used in Ethernet networks. RJ45 connectors feature eight pins to which cables interface electrically.

Fiber Optic Cable
Fiber optic cables carry information using pulses of light. These cables are designed for long distance network communications, although fiber to the home installations are becoming more common.

ADSL
An ADSL line is a cable connecting providing internet connectivity for voice and/or data network service. ADSL lines most commonly are rented by businesses and private individuals to gain connectivity to the internet.