UNIVERGE SV8100 Issue 5.0Direct Inward System Access (DISA) 1 - 409Direct Inward System Access (DISA)DescriptionDISA permits outside callers to directly dial system extensions, trunks and selected features. This couldhelp an employee away from the office that wants to directly dial co-workers or use the company trunksfor long distance calls. To use DISA, the employee: Dials the telephone number that rings the DISA trunk Waits for the DISA trunk to automatically answer with a unique dial tone Dials the 6-digit DISA password (access code) Waits for a second unique dial tone Accesses a system trunk, uses a selected feature or dials a system extensionDISA calls ring system extensions like other outside calls. If an extension has a line key for the DISAtrunk, the call rings that key. If the extension does not have a line key, the extension must have a CallAppearance (CAP) key to answer the call.You can set DISA operation differently for each Night Service mode. For example, a trunk can be anormal trunk during the day and a DISA trunk at night. You can also set the routing for DISA trunks whenthe caller dials a busy or unanswered extension, dials incorrectly or forgets to dial.DISA allows 15 users, 15 DISA Classes of Service and 200 trunks.DISA Class of ServiceDISA Class of Service provides features and dialing restrictions for DISA callers. This allows you tocontrol the ability of the DISA callers dialing into your system. When a DISA caller first accesses thesystem, they can be prompted to enter a DISA password before proceeding. The system associates thepassword entered with a specific user number, which in turn has a Class of Service. If the Class ofService allows the action (such as making outgoing trunk calls), the call goes through. If the DISA Classof Service does not allow the action, the system prevents the call. The DISA Class of Service optionsare: Trunk Group Routing/ARS AccessWhen a DISA caller dials into the system, they may be able to dial 9 and place outside calls. Anytoll charges are incurred by the system. The call follows the system Trunk Group Access orAutomatic Route Selection – whichever is enabled. Trunk Group AccessDISA callers may be able to access a specific trunk group for outgoing calls through the system. Toaccess a Trunk Group, the user dials Service Code 704 followed by the Trunk Group number
