HP KAYAK XM600 Troubleshooting Manual page 6

Introduction
at the network interface. Use caution when installing or modifying telephone
lines. Avoid using a telephone (other than a cordless type) during a lightning
storm. There may be a risk from lightning.
Do not use the telephone to report a gas leak in the vicinity of the leak.
Never touch or remove the communications board without first removing the
connection to the telephone network.
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