2.1 Changed and Added Features24 Features GuideDirect Inward System Access (DISA)DescriptionAllows an outside caller to access specific system features as if the caller is an extension in thesystem. The caller can have direct access to features such as:• Placing an intercom call to an extension, operator, modem (for remote systemadministration) or external pager (for TAFAS: Trunk (Outside Line) Answer From AnyStation). A dialling route using a one digit number (DISA built-in automated attendantnumber) is available.• Calling an external party.One of the following security mode must be selected to prevent the caller from makingunauthorised calls. <[809] DISA Security Type>However, when making an outside call by Call Forwarding – to Outside Line, the call ispermitted (exception).An Outgoing Message can be programmed for the DISA feature. When a caller reaches theDISA line, a pre-recorded message will greet the caller. Two different DISA messages may berecorded by the operator. Thus, one message may be used in day mode and the other in nightmode, or they can be used for different outside lines.WarningWhen you enable the Outside-to-Outside Line Call feature of DISA function, if a third partydiscovers the password (a DISA User Code) of the system, you have a risk that they will makeillegal phone calls using your telephone line, and the cost may be charged to your account. Inorder to avoid this problem, we strongly recommend the following points:a) Carefully maintain the secrecy of the password.b) Specify a complicated password as long and random as you can make it.c) Change the password frequently.Security Mode DescriptionNon Any caller can make outside or intercom calls.Outside Line A pre-assigned DISA user code is required to make outsidecalls.