
How DISA Functions
Understanding the Features – 85
General Description GCA40–242
Caller Dials
DISA Number
Caller Hears DISA Tone
or DVA Message
Intercom
Station Rings
Caller Dials
Correct Access
Number
Caller Dials
Incorrect
Access Number
System Disconnects
CallerorProvides
Call Routing
Caller Dials
Authorization
Code
Caller Dials
Correct Code
Caller Dials
Incorrect Code
Caller Dials
Intercom
Number
Caller Dials
DISA Access
Number
Caller Accesses Features
Available To Associated
Station Class Of Service
System Returns
Authorization Tone
System Allows Caller To Dial Code Twice More.
After Third Incorrect Number, System Disconnects Caller.
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