AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 275

Customer Support Information
If you have a special telephone line connected to your Hybrid/PBX
or Key system for Remote Administration and Maintenance, you
should do one of the following:
— Unplug the line when it is not being used.
— Install a switch in the line to turn it off when it is not being used.
— Keep the Remote Administration and Maintenance telephone
number secret. Only give it to people who need to know it, and
impress upon them the need to keep it a secret. Do not write the
telephone number on the Hybrid/PBX or Key system, the
connecting equipment, or anywhere else in the system room.
If your Remote Administration and Maintenance feature requires
that someone in your office transfer the caller to the Remote
Administration and Maintenance extension, you should impress
upon your employees the importance of only transferring
authorized individuals to that extension.
Maintenance and Troubleshooting
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