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DPT Features 4-53
4.2 DPT Features D
Direct Inward System Access (DISA)
Allows an outside caller to access specific system features as if the caller is an extension in
the system. A DISA outgoing message gives outside callers assistance, such as listing the
extension numbers in the system.
You also have the option of dialing route for extension using a one digit number (DISA
built-in auto attendant number) via DISA calls.
Calling an extension
1. Dial the DISA phone number.
• You hear a ringback tone.
2. You hear the DISA outgoing message.
3. Dial the extension number.
• You can dial the DISA built-in auto attendant number
instead.
• You hear a ringback tone.
Conditions
• 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, if
nothing 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
[407]–[408] DIL 1:1 Extension — Day/Night
[409]–[410] Intercept Extension — Day/Night
1
DISA phone number
3
extension number
2