4. LAN
BASIC SPECIFICATIONS
Transmission system: 10 Base-T
Transmission speed:
10Mbits/sec
Transmission distance: Segment length max. 100m
Transmission cable:
Twisted pair cable (Category 5)
No. of connectable
machines:
Master: 1
Satellites: max. 63
Note: 1
The example of composition of LAN (10 Base-T)
Note: 2
For connecting LANs, use UTP Category-5 cables.
UTP (Unshielded Twisted Pair) cables consist of four pairs of un-
shielded copper wires twisted around each other and, bundled with
resin and coated into a single line. UTP cabling prevents the entrance
or discharge of electromagnetic noise from or into peripheral circum-
stances. Cat-5 (Category-5) cables are a popular type of LAN cable
that is used for connecting network equipment and can be used at
speeds up to 100 Mbps. UTP cables are widely used for both
10BASE-T and 100BASE-TX interface standards.
Cat-5 cable connectors are 8-pin (RJ45) modular jacks that meet
category standards. This type of modular jack meets transmission
performance standards including EIAS/TIA/TBS40 and allows a high-
speed communication of up to 100 Mbps.
The maximum length of Cat-5 cables connecting network equipment
is set to 100m depending upon attenuation of waveforms and delay
times.
HUB
HUB
HUB
HUB
MAX 100m
MAX 100m
MAX 100m
MAX 100m
POS
POS
POS
PC
MAX 500m (HUB MAX 4)
MAX 100m
