35
CPSMC19xx-100 PointSystem
™
Chassis
24-hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Cable Specifications
Null Modem Cable
The Null Modem Cable is used for connecting a terminal or terminal emulator to
the management module’s DB-9 connector to access the command-line interface.
The table below shows the pin assignments for the DB9 cable.
Function Mnemonic Pin
Carrier Detect CD 1
Receive Data RXD 2
Transmit Data TXD 3
Data Terminal Ready DTR 4
Signal Ground GND 5
Data Set Ready DSR 6
Request To Send RTS 7
Clear To Send CTS 8
The table below shows the pin assignments for the RS-232 Null Modem cable:
RJ-45 Cable
Category 5:
Gauge: 24 to 22 AWG
Attenuation: 22.0 dB /100m @ 100 MHz
Maximum Cable Distance: 100 meters
• Straight-through OR crossover cable may be used.
• Shielded twisted-pair (STP) OR unshielded twisted-pair (UTP) may be used.
• Pins 1&2 and 3&6 are the two active pairs in an Ethernet network.
(RJ-45 Pin-out: Pin 1 = TD+, Pin 2 = TD-, Pin 3 = RD+, Pin 6 = RD-)
• All pin pairs (1&2, 3&6, 4&5, 7&8) are active in a Gigabit Ethernet network.
• Use only dedicated wire pairs for the active pins:
(e.g., blue/white & white/blue, orange/white & white/orange, etc.)
• Do not use flat or silver satin wire.
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