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If you have cables exceeding recommended distances, or if you have cables that
pass between buildings, give special consideration to the effect of lightning strikes
or ground loops. The electromagnetic pulse caused by lightning or other high-
energy phenomena can easily couple enough energy into unshielded conductors to
destroy electronic devices. If your site has experienced problems of this sort,
consult experts in lightning suppression and shielding.
Most data centers cannot resolve the infrequent, but potentially catastrophic
problems just described without pulse meters and other special equipment. Take
precautions to avoid these problems by providing a properly grounded and
shielded environment, with special attention to issues of electrical surge
suppression.
To predict and remedy strong electromagnetic interference, consult experts in
radio-frequency interference (RFI).
3.5
Console Considerations
Before connecting the console port, read the following section.
3.5.1 Console Port Connections
Each router system includes an RJ45 console asynchronous serial port wired as a
data communications equipment (DCE) device. This port connects to a terminal
using an RJ45-to-DB-25 adapter. Table A-1 in Appendix A lists the pinout for this
console port. The default parameters for the console port follow: 9600 baud, 8 data
bits, no parity generated or checked, and two stop bits. The console port does not
support hardware flow control.
3.6
Network Connection Considerations
Read this section to prepare for your network connections.
3.6.1 Token Ring Connections
The Token Ring port is an RJ45 connector (Figure 4-3) located on the rear left of
the BRIM module. Use the supplied cable to connect the Token Ring port on the
CRBRIM-W/T to the RJ45 port on the host MIM/Hub. Refer to the host MIM/
Hub User's Guide for proper installation guidelines.
Hardware User's Guide
Console Considerations
Hardware Installation Guide
3-5
5
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Troubleshooting
