Standard Telephone Features 5-415.2 Standard Telephone Features DDirect Inward System Access (DISA)Allows an outside caller to access specific system features as if the caller is an extension inthe system. A DISA outgoing message gives outside callers assistance, such as listing theextension numbers in the system.You also have the option of dialing route for extension using a one digit number (DISAbuilt-in auto attendant number) via DISA calls.Calling an extension1. Dial the DISA phone number.• You hear a ringback tone.2. You hear the DISA outgoing message.3. Dial the extension number.• You hear a ringback tone.Conditions• An outside caller is not allowed to call an outside party via the system.• When there is no answer for the incoming intercom call before the “Intercept Time”expires, “Intercept Routing” starts or the call will be disconnected after ten seconds.• “Intercept Routing” starts five seconds after the DISA outgoing message is sent, ifnothing has been dialed. The call is disconnected when the “No Answer Time”(default: 3 rings) expires, or when there is no destination for “Intercept Routing”.• This system supports up to ten programmable DISA built-in auto attendant numbers.Each number must be one digit.Programming References• System Programming — Installation Manual[202] Call Forwarding — No Answer Time[203] Intercept Time[206] Outside-to-Outside Line Call Duration Time[407]–[408] DIL 1:1 Extension — Day/Night[409]–[410] Intercept Extension — Day/Night[813] Floating Number Assignment123DISA phone numberextension number
