NEC Univerge SV8100 Features And Specifications Manual page 420

Issue 1.0
In a system with ARS enabled:
When a DISA caller dials 0 for an outside call (if allowed), the system routes the call via ARS.
In a system with ARS disabled:
When a DISA caller dials 0 for an outside call (if allowed), the system uses the routes
programmed for Trunk Group Routing.
Transferred calls on DISA, DID, DIL, ISDN trunks, or from the VRS can display the reason a
call is being transferred (Call Forward, Busy, No Answer or DND).
Long conversation cutoff is controlled separately for manually transferred Tandem Trunk
calls, automatically transferred Tandem Trunk calls, and DISA calls.
Tandem Trunking also uses the Continue/Disconnect codes DISA uses.
Department Calling with Overflow Message requires a DSP daughter board for VRS.
DISA can only be set to call forward to another extension. Call Forward Off-Premise is not
supported.
Default Setting
Disabled
System Availability
Terminals
Remote Analog DTMF telephones
Required Component(s)
CPU Daughter Board
Related Features
Automatic Route Selection
Central Office Calls, Answering
Direct Inward Dialing (DID)
Direct Inward Line (DIL)
Long Conversation Cutoff
Tandem Trunking (Unsupervised Conference)
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PZ-VM21 VM8000 InMail (for Announcements)
and
UNIVERGE SV8100
Direct Inward System Access (DISA)