Specifications

OfficeServ 7200 System Description
© SAMSUNG Electronics Co., Ltd. 3-11
3.2.1.3 Signaling Type of the LAN
The electrical characteristics of the 10 BASE-T, which complies with the IEEE802.3
standard, are shown in the table below:
Table 3.17 Electrical Characteristics of the LAN Interface (10 BASE-T)
Category Specification
Transmission speed 10 Mbits/s ±50 ppm
Transmission code Manchester coding
- When the transmission data bit is ‘0’, the higher level of the middle
bit is inversed into the lower level. When the transmission data bit is
‘1’, the lower level of the middle bit is inversed into the higher level.
Access control method Carrier Sense Multiple Access/Collision Detect (CSMA/CD)
Transmission media UTP (Unshielded Twisted Pair) CAT3, CAT4, CAT5,
STP (Shielded Twisted Pair)
Number of the UTP pairs 2 pairs
Characteristic resistance 100 W
Cable thickness Diameter: 0.51 mm (24 AWG), External diameter: 5 mm
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 W
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.