NEC XN120 Feature Manual page 81

Conditions
The DISA caller must use a DTMF dial telephone. DISA trunks should have disconnect
supervision to prevent phantom calls should the caller abandon the call.
Default Setting
Disabled.
n Programming
Ø 10-09-01 : DTMF and Dial Tone Circuit Setup
Ø 11-01-01 : System Numbering
Ø 11-09-02 : Trunk Access Code - Alternate Trunk Route Access Code
Ø 14-01-02 : Basic Trunk Data Setup - Transmit CODEC Gain Type
Ø 14-01-13 : Basic Trunk Setup - Loop Disconnect Supervision
Ø 20-01-05 : System Options - DTMF Receiver Active Time
Ø 20-09-01 : Class of Service Options (Incoming Call Service) - Second Call for DID/ DISA/
Ø 20-14-01 - 20-14-11 : Class of Service Options for DISA/E&M
Ø 21-15-01 : Alternate Trunk Route for Extensions
Ø 22-01-11 : System Options for Incoming Calls - VRS Waiting Message Interval Time
Ø 22-02-01 : Incoming Call Trunk Setup
Ø 22-04-01 : Incoming Extension Ring Group Assignment
Ø 25-03-01 : DID/DISA Transfer Ring Group With Incorrect Dialling
Ø 25-04-01 : DID/DISA Transfer Ring Group With No Answer/Busy
Ø 25-07-01 : System Timers for DID/DISA - DISA Dial Tone Time
Ø 25-07-02 : System Timers for DID/DISA - DID/DISA No Answer Time
Ø 25-07-07 : System Timers for DID/DISA -DISA Conversation Warning Tone Time
Ø 25-07-08 : System Timers for DID/DISA - DISA Long Conversation Disconnect
Ø 25-07-09 : System Timers for DID/DISA - DISA Internal Paging Time
Ø 25-07-10 : System Timers for DID/DISA - DISA External Paging Time
Ø 25-07-13 : System Timers for DID/DISA - DID/DISA Busy Tone Interval
Ø 25-08-01 : DISA User ID Setup
Ø 25-09-01 : Class of Service for DISA Users
Ø 25-10-01 : Trunk Group Routing for DISA
Ø 25-11-01 : DISA Toll Restriction Class
Ø 25-12-01 : Alternate Trunk Group Routing for DISA
Ø 25-13-02 : System Option for DISA - Continue Code for DISA Trunk-to-Trunk
Ø 25-13-03 : System Option for DISA - Disconnect Code for DISA Trunk-to-Trunk
Ø 80-03-01 : DTMF Tone Receiver Setup
n Related Features
Ø Automatic Route Selection
Ø Central Office Calls, Answering
Ø Direct Inward Dialling (DID) / Direct Inward Line (DIL) / Voice Response System (VRS)
Ø Long Conversation Cutoff
Ø Voice Response System (VRS)
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Features
Features Manual