Specifications

Chapter 4 - 152 Features
NEC Business Solutions Ltd XEN Topaz
Doc. No. 8846 - Release 2.0 April 2005
Direct Inward System Access (DISA)
• Description
DISA permits outside callers to directly dial system extensions, trunks and selected
features. This could help an employee away from the office that wants to directly dial
co-workers or use the company’s trunks for 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 exten-
sion
DISA calls ring system extensions like other outside calls. If an extension has a line key
for the DISA trunk, the call rings that key. If the extension does not have a line key, the
call rings a CALL key.
You can set DISA operation differently for each Night Service mode. For example, a
trunk can be a normal trunk during the day and a DISA trunk at night. You can also set
the routing for DISA trunks when the caller dials a busy or unanswered extension, dials
incorrectly or forgets to dial.
DISA Class of Service
DISA Class of Service provides features and Dialling restrictions for DISA callers. This
allows you to control the capabilities of the DISA callers Dialling into your system.
When a DISA caller first accesses the system, they must enter a DISA password before
proceeding. The system associates the password entered with a specific user number,
which in turn has a Class of Service. If the Class of Service allows the action (such as
making outgoing trunk calls), the call goes through. If the DISA Class of Service doesn’t
allow the action, the system prevents the call. The DISA Class of Service options are:
• Trunk Group Routing/ARS Access
When a DISA caller dials into the system, they may be able to dial 0 and
place outside calls. Any toll charges are incurred by the system. The call fol-
lows the system’s Trunk Group Access or Automatic Route Selection -
whichever is enabled.
• Trunk Group Access
DISA callers may be able to access a specific trunk group for outgoing calls
through the system. To access a Trunk Group, the user dials Service Code
804 followed by the Trunk Group number (e.g., 01). This allows the DISA
caller to place an outgoing call over the selected group. Trunk Group Access
bypasses the system’s Trunk Group Routing/ARS/Trunk Access Maps. As
with dial 0 access, any toll charges are incurred by the system. Also see
Direct Trunk Access below.
• Common Abbreviated Dialling
The system’s Common Abbreviated Dialling bins may be available to DISA
callers. This could save the DISA caller time when Dialling.
• Operator Calling
A DISA caller may be able to dial 9 for the system’s operator.