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.
