Samsung OfficeServ 7400 General Description Manual page 77

The electrical characteristics of the 1000 BASE-TX interface, which comply with the
IEEE802.3ab standards, are shown in the table below:
Table 3.15 Electrical Characteristics of LAN Interface (1000 BASE-TX)
Categories
Transmission speed
Transmission code
Access control method
Transmission media
Number of UTP pairs
Characteristic resistance
Cable thickness
The electrical characteristics of the 1000 BASE-SX/LX interface, which comply with
the IEEE802.3z standards, are shown in the table below:
Table 3.16 Electrical Characteristics of LAN Interface (1000 BASE-FX)
Categories
Transmission speed
Transmission code
Access control method
Transmission media
Number of Optical
Fibres
Maximum transmission
distance
Cable thickness
© Samsung Business Communications
1000 Mbps
8B1Q4
The 8-bit transmission data are converted into 9-bit transmission data via
the additional treatment of scramble, error detection bit, and then are
mapped into the transmission signals of 4 teams with 5 levels, and are
randomized into each pair of transmission signals to be transmitted.
CSMA/CD
UTP CAT5 (Maximum transmission distance 100 m)
4 pairs
100 Ω
Diameter 0.51 mm (24 AWG), External diameter 6 mm
1000 Mps
8B/10B Data Encoding
The 8-bit (8B) data entered from the upper layer of the MAC Part are
handled in one nibble to be converted into 10-bit (10B) signals at the
physical layer. Then each nibble of the converted data is transmitted.
The transmission speed after the conversion into 8B/10B is 1250
Mbps.
CSMA/CD
SX: Multimode Optical Fibre (MMF)
LX: Multimode Optical Fibre/Single mode Optical Fibre (SMF)
2 pairs
SX: Maximum 550 m
LX: Maximum 5 km
Diameter 0.51 mm (24 AWG), External diameter 6 mm
OfficeServ 7400 General Description
Specifications
Specifications
3-9