Netopia Router PN Series - Manual (Page 57)

Configuring ISDN and Leased Line Connections 2-41
WAN Setup
Line Configuration...
Connection Profiles...
Default Answer Profile...
From here you will configure yours and the remote sites' WAN information.
1. Select Default Answer Profile in the WAN Setup screen. Press
Return. The Default Profile screen appears.
2. To enable CNA authentication, select Calling Number
Authentication in the Default Profile screen and choose one of
the following settings:
Ignored: Calling Number Authentication (CNA) is not in effect.
This is the default setting.
Preferred: Authentication is attempted if the calling number is
available. If authentication fails, or the calling number is not
available, the call proceeds as usual and the caller may still
connect successfully. Use this setting if you expect to receive
both regular and CNA-authenticated calls.
Required: Authentication is attempted if the calling number is
available. If authentication fails, or the calling number is not
available, the Netopia Router disconnects the caller. Use this
setting if you require all calls to be CNA-authenticated.
Calling Number Authentication (CNA), is an application of
CallerID. It is a method of verifying that an incoming call is
originating from an expected site. Using CNA, you can increase
the security of your network by requiring that callers not only
possess the correct PPP authentication information, but also are
calling from a particular physical location.
CNA works by matching the actual calling number to the number
entered in the Calling Number field in the answering side’s
connection profile. When a match occurs, the incoming call is
handled by the connection profile containing the matched
number.