Samsung OFFICESERV 7100, Service Manual

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OfficeServ 7100 Service Manual
© SAMSUNG Electronics Co., Ltd.
1-11
Table 1.10 Electric Characteristics of PRI C.O. line (Continued)
Category Description
Transfer Media Twisted-pair line
Load Resistance 120
Ω
Display(Pulse) Nominal Peak Voltage 3.00 V
Blank(No-Pulse) Peak Voltage 0 ±0.300 V
The electric characteristics of the Digital Line Interface(DLI) are listed in the table below:
Table 1.11 Electric Characteristics of DLI Line
Category Description
Transfer Rate 144 kbits/s
Code AMI
Pulse Type Typical AMI Waveform
LAN Signaling
In 10 Base-T, the LAN signaling satisfies IEEE802.3 standard and its electric characteristics
are listed in the table below:
Table 1.12 Electric Characteristics of LAN Interface (10 Base-T)
Category Description
Transfer Rate 10 Mbit/s ±50 ppm
Transfer Code Manchester encoding
Access Control Method CSMA/CD
Transfer Media UTP CAT3, CAT4, CAT5, STP
Number of UTP Pairs Two Pairs
Characteristic Resistance 100
Ω
Cable Thickness Diameter 0.51 mm(24 AWG), External Diameter 5 mm
In 100 Base-T, the LAN signaling satisfies IEEE802.3u standard and its electric characteristics
are listed in the table below:
Table 1.13 Electric Characteristics of LAN Interface (100 Base-Tx)
Category Description
Transfer Rate 100 Mbit/s ± 50 ppm
Transfer Code 4B/5B+MLT-3(4 bit/5 bit) converts 4-bit-data into 5-bit data in a
physical layer and encodes the data. Multi-Level
Transmission-3(MLT-3) encodes transmission data into
three levels(high, medium, low).