Nortel Networks Modular ICS 4.0 manual Class of Service COS, Maintaining security

186 / Using System features

hear a stuttered dial tone and must enter a Class of Service password before they are allowed into the system.

Class of Service (COS)

To control the level of telephone service a remote user can access, your installer can assign a remote filter and remote package to the line used for remote access. The remote filter restricts the numbers that can be dialed on the line, and the remote package restricts the use of line pools and the page feature. To change the restrictions for the line, the user can enter their Class of Service (COS) password when the system answers with DISA, or can dial the DISA internal number and enter their Class of Service password.

Maintaining security

To maintain the security of your system, the following practices are recommended:

•Warn anyone to whom you give the remote access number, to keep it confidential.

•Change Class of Service passwords often.

•Warn anyone to whom you give a Class of Service password, to remember it and not to write it down.

•Remove the Class of Service password of anyone who leaves your company.

Accessing Norstar remotely over the public network

1.Dial the Norstar system’s remote access number.

2.When you hear a stuttered dial tone, enter your COS password.

3.Wait for the system dial tone.

To use the system remotely, you must use a telephone with tone dialing to call the system.

Modular ICS 4.0 System Coordinator Guide P0881591 Issue 01