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Summit & Summit 800
Feature Description and Operation Manual
Issue 1.2
318
4.9 Direct Inward System Access (DISA)
Description
Each outside Line may be assigned for DISA service, which allows an incoming caller to gain
access to the system resources and/or features. The iPECS will answer the outside call and
provide intercom dial tone or route to a System announcement where Caller Controlled Routing
may be defined. The DISA caller may then access the desired resource using dial codes.
If an Authorization Code is required for DISA access, when the system answers the incoming
DISA call, DND Warning tone is provided to indicate an Authorization Code must be entered.
Operation
System
Incoming call subject to DISA service
1. Recognize incoming call.
2. Answer call and connect caller to Intercom dial tone or System announcement.
3. Process call based on received digits/programming.
DISA Caller
To access the system’s resources from an external party
1. Place call to DISA facility of the system.
2. At receipt of dial tone/announcement, dial as desired. If DND Warning tone is received,
enter an Authorization Code to receive dial tone.
Conditions
1. Each outside Line is separately assigned for DISA operation during Day, Night and/or
Timed system operation mode. DISA operation is active only when the system is in the
assigned operating mode(s).
2. DISA callers can be routed to a System Attendant announcement in place of Intercom
dial tone. The announcement can be associated with a CCR Table or assigned to
disconnect after playback.
3. A DISA caller can be required to enter an Authorization Code to access the system’s
external outgoing resources, facilities or features. If required, the caller is permitted to
retry entry of a valid Authorization Code based on the DISA Retry count. Continued
failure results in disconnect.
4. DISA callers are subject to COS (Class of Service) dialing restrictions. If Authorization
Codes are required and the code entered matches a Station Authorization Code, the
station’s COS (Class of Service) will apply. Otherwise, the assigned DISA COS (Class
of Service) will apply. In both cases, the Line COS (Class of Service) for the outgoing
Line will be active.
5. The system will disconnect an outgoing DISA call if the Unsupervised Conference
timer expires or disconnect supervision is received. A disconnect warning tone is
provided 15 seconds prior to disconnect.