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Avaya M770 ATM Switch User’s Guide 249
Chapter 20
Signaling Security (Access Control) Commands
This part lists and describes the CLI commands of the Avaya M770 ATM switch's
Signaling Security (Access Control) feature. The purpose of the Signaling Security
feature is to filter out calls during the setup phase at the signaling level. The filtering
is based on the source/destination ATM addresses present in the call setup. The
rules by which calls are screened are based on creating a Template that defines the
addresses mask and the rule (permit/deny) and creating filters that assign
templates to vports.
The calls screening procedure is as follows:
Figure 20.1 Call Screening Procedure
Start
Signaling
Security State
Accept the call
Reject the call
Disabled
VPORT
in Secured
Mode
No
Traverse the
filters list from
highest priority to
lowest priority
and stop at the
first match.
Yes
Match found?
No
Check
Template
Yes
Permitted
Not
permitted