From 6f3fbbb5598eb5e0f01c371e9e1b10679bd86837 Mon Sep 17 00:00:00 2001
From: binh <>
Date: Sat, 19 Feb 2005 15:39:23 +0000
Subject: [PATCH] Gradually fixing markup. Binh.
---
.../docbook/Linux-Networking/Media-Types.xml | 111 +++---------------
1 file changed, 19 insertions(+), 92 deletions(-)
diff --git a/LDP/guide/docbook/Linux-Networking/Media-Types.xml b/LDP/guide/docbook/Linux-Networking/Media-Types.xml
index 2c2efae1..704f3f83 100644
--- a/LDP/guide/docbook/Linux-Networking/Media-Types.xml
+++ b/LDP/guide/docbook/Linux-Networking/Media-Types.xml
@@ -2,8 +2,6 @@
Media-Types
-Media Types
-
Common network media include twisted pair (UTP and STP), coaxial cable,
fiber-optic cable, and wireless transmissions via infrared and radio waves.
@@ -12,10 +10,12 @@ their vulnerability to EMI and eavesdropping, their bandwidth, and the
maximum distance at which they can be used.
-Twisted Pair Ethernet Cable
+
-Unshielded Twisted Pair (UTP)
+Twisted Pair Ethernet Cable
+Unshielded Twisted Pair (UTP)
+
UTP is the most common type of network cable in use today. UTP consits of
one or more pairs of insulated copper wires. The wires are twisted together
@@ -44,6 +44,8 @@ and Category 5 is the highest-quality network cable. The UTP categories and
the bandwidth they support are summarized below.
+
+
Category Maximum Data and Transfer Rate Description
3 10 Mbps Least expensive network cable, commonly used
4 16 Mbps Medium quality; rarely used
@@ -52,9 +54,11 @@ Category Maximum Data and Transfer Rate Description
> Start Binh
5 1000Mbps Highest Quality
> End Binh
+
+
-Shielded Twisted Pair (STP)
-
+Shielded Twisted Pair (STP)
+
STP cable is similar to UTP, but inclues a foil or wire mesh shield
between the wire pairs and the outer insulation. The shield is electrically
@@ -68,8 +72,11 @@ susceptible to EMI and eavesdropping. The reduced inteference allows for higher
bandwidth, potentially as high as 500 Mbps.
-Coaxial
+
+Coaxial
+
+
Coaxial Cable consists of a single thick copper wire surrounded by an
insulator. A shield surrounding the insulator is used as the second conductor,
@@ -104,8 +111,8 @@ RG-62 93 ohms ARCnet
-Fiber Optic
-
+Fiber Optic
+
A fiber optic cable consists of a thin glass or clear plastic fiber encased
in a protective jacket. Signals are sent through the cable in form of light.
@@ -119,7 +126,7 @@ high bandwidth (up to 2 Gbps (gigabits per second) and extremely low attenuation
Fiber cable can reach distances ranging from severak miles for multimode cable
to hundreds of miles for single-mode cable.
-Infrared
+Infrared
Wireless infrared networking systems are modulated beams of infrared light to
@@ -196,7 +203,6 @@ nearly global range. The bandwidth can be as high as 10 Mbps, but the satellite
relays cause delays that may impair real-time communication. These systems are
more expensive than wireless communication.
-
Please note that any information after this point in this section is largely
redundant as these technologies have been superceded (from the perspective of
@@ -204,86 +210,7 @@ being economically more viable and also technologically superior) by
those that have been outlined above.
-Serial NULL Modem cable
-
-
-Not all NULL modem cables are alike. Many null modem cables do little more
-than trick your computer into thinking all the appropriate signals are present
-and swap transmit and receive data. This is ok but means that you must use
-software flow control (XON/XOFF) which is less efficient than hardware flow
-control. The following cable provides the best possible signalling between
-machines and allows you to use hardware (RTS/CTS) flow control.
-
-
-
-
- Pin Name Pin Pin
- Tx Data 2 ----------------------------- 3
- Rx Data 3 ----------------------------- 2
- RTS 4 ----------------------------- 5
- CTS 5 ----------------------------- 4
- Ground 7 ----------------------------- 7
- DTR 20 -\--------------------------- 8
- DSR 6 -/
- RLSD/DCD 8 ---------------------------/- 20
- \- 6
-
-
-
-Parallel port cable (PLIP cable)
-
-
-If you intend to use the PLIP protocol between two machines then this
-cable will work for you irrespective of what sort of parallel ports you
-have installed.
-
-
-
-
- Pin Name pin pin
- STROBE 1*
- D0->ERROR 2 ----------- 15
- D1->SLCT 3 ----------- 13
- D2->PAPOUT 4 ----------- 12
- D3->ACK 5 ----------- 10
- D4->BUSY 6 ----------- 11
- D5 7*
- D6 8*
- D7 9*
- ACK->D3 10 ----------- 5
- BUSY->D4 11 ----------- 6
- PAPOUT->D2 12 ----------- 4
- SLCT->D1 13 ----------- 3
- FEED 14*
- ERROR->D0 15 ----------- 2
- INIT 16*
- SLCTIN 17*
- GROUND 25 ----------- 25
-
-
-
-Notes:
-
-· Do not connect the pins marked with an asterisk `*'.
-· Extra grounds are 18,19,20,21,22,23 and 24.
-· If the cable you are using has a metallic shield, it should be
- connected to the metallic DB-25 shell at one end only.
-
-
-Warning: A miswired PLIP cable can destroy your controller card. Be very
-careful and double check every connection to ensure you don't cause yourself
-any unnecessary work or heartache.
-
-
-
-While you may be able to run PLIP cables for long distances, you should avoid
-it if you can. The specifications for the cable allow for a cable length of
-about 1 metre or so. Please be very careful when running long plip cables as
-sources of strong electromagnetic fields such as lightning, power lines and
-radio transmitters can interfere with and sometimes even damage your controller.
-If you really want to connect two of your computers over a large distance you
-really should be looking at alternatives such as obtaining a pair of thin-net
-ethernet cards and running some coaxial cable.
-
+- Serial NULL Modem cable
+- Parallel port cable (PLIP cable)