6. Security and Logins

Controlling ISDN Access

FrameSaver units with the built-in DBM limit access through the following methods:

TISDN Call Security Disabling ISDN Access

ISDN Call Security

The FrameSaver unit uses the Caller Identification Method to screen calls and avoid accidental or intentional disruption of network traffic. The answering DBM only accepts calls with valid calling number identifiers or phone numbers.

When the ISDN DBM interface is enabled and Caller Identification Method is set to Caller ID, the DBM takes advantage of ISDN services for network backup and Calling Number Identification Service (CNIS) to provide backup security. ISDN assures the integrity of calling party identifiers. The DBM uses the calling party identifier to identify the calling unit and switches PVC connections as specified by the user. No additional security is required.

When the ISDN DBM interface is enabled and Caller Identification Method is set to Proprietary, the DBM queries the originating unit for its Local Phone Number to identify the calling unit. If the returned number is in one of the unit’s Inbound Calling IDs, the call is accepted. If not, or if the queried unit does not respond within five seconds, the unit drops the call.

See Caller Identification Method in Table 4-11, ISDN Link Profile Options, in

Chapter 4, Configuration Options, for additional information.

Disabling ISDN Access

Procedure

To disable ISDN access:

1. Select the ISDN Physical options.

Main Menu Configuration ISDN Physical

2.Set Interface Status to Disable.

3.Save your change.

See Configuring the ISDN DBM Interface in Chapter 4, Configuration Options, for more information about ISDN BRI or PRI DBM configuration options.

9128-A2-GB20-80

September 2002

6-5

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Paradyne CSU, DSU, 9126-II, 9128-II manual Controlling Isdn Access, Isdn Call Security, Disabling Isdn Access