3com 7000 Instruccion De Instalación
Ethernet Cabling
119
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Use two twisted-pairs for each link.
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Use twisted-pair wire that is 22-26 AWG (0.5 millimeter) in diameter.
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Use twisted-pair wire with an impedance between 85 and 115 ohms.
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Make sure that the maximum twisted-pair link length from the system
to any potential workstation location is 100 meters (328 feet).
to any potential workstation location is 100 meters (328 feet).
Cable Pinouts
Management connections may be established with a direct cable link to a
PC-AT serial port, or via modem. The following tables detail cable pinouts
for 9 and 25 pin PC-AT links, and for a modem connection.
PC-AT serial port, or via modem. The following tables detail cable pinouts
for 9 and 25 pin PC-AT links, and for a modem connection.
CoreBuilder 7000 Serial Port
The CoreBuilder 7000 provides a standard DB-9 connector for
management connections (refer to Figure 17). Table 31 details the pinout
and functions for this connector. The CoreBuilder 7000 plays the standard
role of a DCE.
management connections (refer to Figure 17). Table 31 details the pinout
and functions for this connector. The CoreBuilder 7000 plays the standard
role of a DCE.
Figure 17 Serial Port Pinouts