3-20 DBS 576 (USA) issued September 2001 576-50-700
Chapter 3. System Features Section 700 - Operation
DISA Ringing
DISA Ringing (which is related to the DISA feature) allows a CO trunk specified as a DISA CO trunk
to ring and give off-site users dial-in access to the System. Once the DISA trunk is accessed, the user
receives dial tone and may dial an extension.
For more information on DISA, see “Direct Inward System Access” on page 3-28.
Hardware Requirements
•N/A
Related Programming
•N/A
Considerations
•N/A
Multiple Ringing
Description
Multiple Ringing allows CO calls into the System to be directed to ring multiple extensions in the
System. This can be very useful when anyone in a group may answer a call. This can also be very
useful at night when only a selected number of people are available to handle calls.
Hardware Requirements
•N/A
Related Programming
•N/A
Considerations
•N/A
CO Trunk Interface
Description
The System supports several types of CO Trunk Interfaces including the following:
• Direct Inward Dialing (DID)
• Integrated Services Digital Network (ISDN) - Basic Rate Interface (BRI)
• ISDN - Primary Rate Interface (PRI)
• Loop Start and Ground Start
Each trunk type supports various features such as Delayed Ringing, Night Ringing, etc.
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