Network cabling
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[edit] Common Network Cabling
A common early cable was the RS-232 D Serial cable ( yes you can use the unused signals to network a computer , this will be a science project later ) one bit at a time very slow connection Paralell cables can talk at one bit per line at a time - an 8 pin cable can have 8 bits at once assuning one bit is one line and software handles all handshaking.
RJ-11 is the terminator typically used on plugin phone cables. This cable type has been used for many years by TELCOs all over the world - six pin cable schmatics to follow at a later date.
RJ-45 connectors now terminate most common cables used for hub based or star style TCP/IP networks. RJ-45 terminated cable ends are shown to right. Schematics to follow at a later date. Now that we understand what cables are used the next step is to learn signal processing.
Early TCP/IP networks functioned with looped coax cables or very thick D connector style cables running from one computer to the next rather than via centralized star style hub components.
[edit] General issues and cable types
cable is a medium which provides physical path for data transmission. They exist in several types, some networks use the same type, other use multiple types.
[edit] Twisted Pair cable
Relatively inexpensive form of LAN cabling. It can accommodate different topologies, but mostly implemented in a star topology.
- Unshielded twisted pair (UTP) features the variety of grades. each pair has several twists per inch (depending on the grade) These twists help to eliminate the electromagnetic interference
- Shielded twisted pair insulated wire pairs are covered by metallic shielding. Sheilding acts as Antenna, converting noise into current
- Screened twisted pair...
[edit] Coaxial cable
Found in early ethernet networks (~1980)
[edit] Fiber Optical Cable
[edit] Grounding and bonding
- LIghting protection systems
- Grounding electrode sysmes
- electrical bonding and grounding
- Power protection
- telecom bonding and grounding
8Telecom circuit protector
[edit] External links
[edit] Bibliography
- Network Cabling fundamentals, by Beth Verity
