I/O and Cabling Considerations
3.3.3
Octopus Cables
An octopus cable fans out the 8 serial ports from a 50-pin Telco connector to DB25 connectors
(6-pins used per connector). An octopus cable can be ordered with either 8 male or female
DB25 connectors as shown in Figure 3-12. The following cable lengths are available for both
octopus cable types:
• 0.91 m (3 ft)
• 1.83 m (6 ft)
• 7.62 m (25 ft)
• 15.24 m (50 ft)
Terminal Server
720 I/O Module
Octopus cable: 8 DB-25
(male or female) to 50-pin
male Telco
22 RNG
20 DTR
DCD 8
GND 7
RCV 3
XMT 2
MALE PINOUTS
RCV 2
XMT 3
GND 7
DTR 8
20 DCD
22 RNG
FEMALE PINOUTS
Figure 3-12. Octopus Cable (Male and Female), Connected to I/O Module.
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