OfficeServ 7200 System Description
© SAMSUNG Electronics Co., Ltd.
3-11
The electrical characteristics of the 100 BASE-Tx, which complies with the IEEE802.3u
standard, are shown in the table below:
Table 3.18 Electrical Characteristics of the LAN Interface (100 BASE-T)
Category
Specification
Transmission speed
100 Mbits/s ±50 ppm
Transmission code
4B/5B + MLT-3 (4 bit/5 bit) converts the data of 4 bits to the data of
5 bits and encodes the data on the physical layer. Multi Level
Transmission-3 (MLT-3) encodes transmission data into 3 levels
(high, middle, and low)
Access control type
CSMA/CD
Transmission media
UTP CAT5, STP
Number of UTP pairs
Two pairs
Characteristic resistance
100
Cable thickness
Diameter: 0.51 mm (24 AWG), External diameter: 6 mm
UTP Cable Type
The UTP cable is divided into Straight-through UTP cable and Crossover UTP
cable. The Straight-through UTP cable is used to connect the OfficeServ 7200
’s
LIM/PLIM module with other modules (MP20, MGI16, WIM).
The Crossover UTP cable is used to connect between the LIM/PLIM modules only.
The electrical characteristics of the 1000 BASE-TX, which complies with the IEEE802.3ab
standard, are shown in the table below
Table 3.19 Electrical Characteristics of the LAN Interface (1000 BASE-TX)
Category
Specification
Transmission speed
1000 Mbits/s
Transmission code
8B1Q4 (the 8 bit transmission data is processed using additional
scramble/error detection bits, converted into 9 bit transmission code,
mapped into 5 levels/4 amplitude modulated transmission signals
using the mapping table, randomized into each pair of actual
transmission signals, then transmitted)
Access control type
CSMA/CD
Transmission media
UTP CAT5 (Up to 100 m)
Number of UTP pairs
4 pairs
Characteristic resistance
100
Cable thickness
Diameter: 0.51 mm (24 AWG), External diameter: 6 mm
Transmission speed
1000 Mbits/s
