Instruction manual

Page 1301 of 3156
Features and Services
Direct Inward System Access
Contents
The following are the topics in this section:
Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1301
Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1302
Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1303
Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1305
Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1305
Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1305
Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1308
Feature description
Direct Inward System Access (DISA) allows selected users to access the
system from the public or private network by dialing a special Directory
Number (DN) assigned by the customer. The number can be dialed from any
Digitone telephone outside the network. Once the Direct Inward System
Access (DISA) call has been answered, the user can access any of the
following features and capabilities offered through Direct Inward System
Access:
• Calls to any station within the customer group
• Trunk calls (such as calls to a Public Exchange/Central Office, a TIE
trunk, or paging and dictation trunks)
• Basic/Network Authorization Code (BAUT/NAUT)