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Chapter 12 System features 111
Telephone Features Programming Guide
Class of Service (COS) passwords
Class of Service passwords permit controlled access to a system’s resources both by internal and
remote users. When you enter a Class of Service password at a telephone, the restriction filters
related with your Class of Service password apply, instead of the normal restriction filters. In the
same way, when a remote user enters a Class of Service password on an incoming auto-answer
line, the restriction filters and remote package related with their Class of Service password apply,
instead of the normal restriction filters and remote package. The installer programs the COS
passwords.
Users must memorize their COS passwords instead of writing the password down. Delete an
employees’ COS passwords when they leave the company. Normally, each user has a separate
password. However, several users can share a password or one user can have several passwords.
Change your Class of Service
Enter a Class of Service password when you want to make a call normally restricted on a line or
telephone.
To change the restriction filters on a line or telephone:
1 Press ≤fl°.
2 Enter the six-digit COS password.
COS passwords allow you to define individual passwords and determine the restriction filters, and
remote package related with each.
Maintain security
To maintain the security of your system, the following practices are recommended:
• Warn a person to whom you give the remote access number, to keep the number confidential.
• Change Class of Service passwords often.
• Warn a person to whom you give a Class of Service password, to remember the password and
not to write it down.
• Delete the Class of Service password of a person who leaves your company.
Remote access over the public network
1 Dial the system remote access number.
2 When you hear a stuttered dial tone, enter your COS password.
Warning: Remote users can make long distance calls.
Remember that a remote user can make long distance calls that are charged to
your company. They can also access line pools and make page announcements in
your office.