Avaya M770 - page 270

Chapter 20 Signaling Security (Access Control) Commands
250 Avaya M770 ATM Switch User’s Guide
Note: Once signaling security is enabled, the default behavior is to reject calls.
Note: Any Signaling Security configuration also has an effect on existing calls, i.e.
when setting up a security configuration, you should be aware that any existing call
that would not have been accepted once the configuration is set up will be torn
down.
All Signaling Security related commands are located under /vport/sig/
sigsecurity> CLI directory.