Features
Features Manual
77
Direct Inward System Access (DISA)
n
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 extension
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 9 and place outside calls. Any
toll charges are incurred by the system. The call follows 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
9 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 0 for the system’s operator.
·
Paging
Internal and External Paging may be available to DISA callers. This allows co-workers in adjacent
facilities, for example, to broadcast announcements to each other.
·
Direct Trunk Access
DISA callers may be able to select a specific trunk for outgoing calls through the system. To
directly access a trunk, the user dials Service Code 805 followed by the trunk’s number (e.g., 01).
This allows the DISA caller to place an outgoing call over the selected trunk. Direct Trunk Access
bypasses the system’s Trunk Group Routing/ARS/Trunk Access Maps. As with dial 9 access, any
toll charges are incurred by the system. Also see Trunk Group Access above.
·
DISA/Tie Trunk Barge In
The DISA/Tie Trunk Barge In option allows a tie line caller to break into another extension’s
established call. This sets up a three-way conversation between the intruding party and the two
parties on the initial call.