Instruction manual

Page 1309 of 3156
Features and Services
Direct Inward System Access on
Unsupervised Trunks
Contents
The following are the topics in this section:
Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1309
Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310
Reference list
The following are the references in this section:
•“Direct Inward System Access” on page 1301
Feature description
With this enhancement, Direct Inward System Access (DISA) is allowed on
Public Exchange/Central Office (CO), FEX, and WATS trunks without
disconnect supervision. Without the enhancement, DISA calls on these trunks
are intercepted to the attendant. The Timed Forced Disconnect Timer is used
to prevent the permanent seizure of the Central Office trunk in cases where
the far-end goes on-hook first.