Each CO/IP path 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 the user intercom dial tone or route the call based on the VMIM/VSF Auto Attendant announcement settings 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 an 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 AA announcement.
3. Process call based on received digits/programming
CO lines
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