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186 / Using System features
Modular ICS 4.0 System Coordinator Guide P0881591 Issue 01
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.
p0881591.book Page 186 Wednesday, August 19, 1998 6:43 PM