Shielded cables usually comprise of one or two insulated
wires that are surrounded by an aluminum Mylar foil
or a woven braided shield. The foiled shield of the
cable ensures better signal transmission by eliminating
irregular power frequency and external radio interference.
Mostly, power cables which carry high-voltage of electricity
are shielded for greater protection and better electric
transmission. Shielded cables exhibit better interference
rejection characteristics compared to unshielded cables.
The IEEE 1394 interface is a serial bus interface
standard for high-speed communications frequently used
by personal computers, as well as in digital audio,
and digital video, The interface is also known by the
brand names of FireWire (Apple), i.LINK (Sony), and
Lynx (Texas Instruments).
A punch down tool, also called a punch down tool
is used widely by network technicians. It is used for
inserting wire into insulation-displacement connectors
on punch down blocks or patch panels.
A crimping tool is a tool designed to crimp or connect
a connector to the end of a cable. For example, network
cables and phone cables are created using a crimping
tool to connect the RJ-45 and RJ-11 connectors to the
end of the cable.
RG-6 may be used for both analog and digital television
A toner probe is a simple cable continuity tester.
It consists of two pieces of equipment. One is the tone
generator and the other is the probe. One end of the
cable is hooked to the tone generator, and the other
end is observed for tone using a matching probe. It
is also called "fox and hound" wire tracer.
A protocol analyzer is used to monitor and troubleshoot
problems such as suspicious activity on the network,
verification of network load and type of traffic, artificially
injecting load on to a network for the purpose of load
testing, and other hard to detect problems with the
Certifier, or a certification tester is used to examine
whether the network complies with ISO or TIA standards
as applicable. Some certifiers will also have the capability
to test the email, DNS, and DHCP servers for proper
TDR, Time Domain Reflectometer is a tool that finds
faults in metallic cabbles like twisted wire pairs and
coaxial cables. A similar device, OTDR (short for Optical
Time-Domain Replectometer) is used for testing fiber