CHAPTER 3.
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© SAMSUNG Electronics Co., Ltd.
Table 3.19 Electrical Characteristics of the LAN Interface (1000 BASE-TX) (Continued)
Category
Specification
Transmission code
8B/10B Data Encoding
Processes the 8 bit data received through the upper-layer MAC sub-
layer as one nibble, converts each nibble into 10 bit code through the
physical layer, and transmits the code.
The transmission speed is 1250 Mbps after changing from 8-bit to
10-bit code.
Access control type
CSMA/CD
Transmission media
- SX: Multi-Mode Optical Fiber (MMF)
- LX: Multi-Mode Optical Fiber/Single-Mode Optical Fiber (SMF)
Number of Optical Fiber
2 Pairs
Max Transmission Length
- SX: Up to 550 m
- LX: Up to 5 km
Cable thickness
Diameter: 0.51 mm (24 AWG), External diameter: 6 mm
Table 3.20 Electrical Characteristics of 1000 BASE-Sx/LX Fiber Optic
Fiber Type
Mode Band
(Short Wave/Long Wave
MHz.Km)
Transmission Distance (m)
1000BASE-SX
1000BASE-LX
62.5uM MMF
160/500
220
550
200/500
275
550
50uM MMF
400/400
500
550
500/500
550
550
Mode Band
The mode band in the previous table represents the quality of the multi-mode
optical fiber relative to the transmission speed. The unit is generally represented
in MHz.Km, the optical signal
’s bit rate (the flickering rate of the optical signal)
multiplied by the maximum transmission distance. The higher value means farther
transmission of higher optical signal with higher bit rate. When using the short-
wave laser and the long-wave laser, a mode band is also specified for each type.
Categories of UTP Cable
UTP Cables are classified into Straight-through UTP cable and Crossover UTP
cable. The Straight-through UTP cable is used for connecting the LIM or PLIM
module of OfficeServ 7200 to other modules (MP20, MGI16, WIM).
The Crossover UTP cable is used for connecting only LIM (PLIM) module to LIM
(PLIM) module.
