2.2 Making CallsOperation 512.2.8 To Access Another Party Directly from Outside (DirectInward System Access [DISA])WARNINGWhen you enable the Outside-Outside Line Call feature of DISA function, if a third party discovers thepassword (a DISA User Code) of the system, you have a risk that they will make illegal phone callsusing your telephone line, and the cost may be charged to your account.To prevent this problem from occurring, we strongly recommend the following points:1: Carefully maintain the secrecy of the password.2: Specify a complicated password with several digits.3: Change the password frequently (at least once per month).This feature is possible if an optional card KX-TD61291 is installed in the main unit. This featureallows an outside caller to access specific systemfeatures as if the caller is an extension in thesystem. The caller can have direct access tofeature such as:• Placing an incoming call to an extension oroperator. The caller also has the option ofdialling the route for an extension using 1digit number (DISA Automated Attendant(AA) number) via DISA calls.• Calling an external party.An outgoing message greets the caller and givesinformation about how to access an extension. Youdo not need the operator's assistance.You may not be able to access the features withouta DISA user code depending on the security mode.Non Security Mode: Any caller can make outsideor intercom calls.Trunk Security Mode (Default): A pre-assignedDISA security code must be entered to makeoutside calls.All Security Mode: A pre-assigned DISA securitycode must be entered to make both outside andintercom calls.This prevents the caller from making unauthorisedcalls. However, when making an outside call byCall Forwarding – to Outside (CO) Line, the call isallowed (exception). Ask your manager for themode assigned to your system.• An optional voice message card KX-TD 61291 is required to enable DISA function.• This feature is available only for DTMF (Touch Tone) telephone user.
