Chapter 15 Integrated Services Data Network (ISDN)

DID Addressing

This feature allows incoming ISDN-PRI calls to terminate to stations, Attendant Console, Automated Attendant, etc., based on the Called Party number. Direct Inward Dial trunks will be terminated to preprogrammed destinations without Attendant assistance.

Service Conditions

1.If the network is notified that the destination station for the DID call is busy or a connection-controlled station, the network gives the calling station a Busy Tone. (This depends upon call forwarding services being in service.)

2.If the called station is nonexistent, the DID call can be routed to the Attendant Console, another pre- designated station, or to receive Reorder Tone.

Note: Refer to the Business Features and Specifications manual for more details of DID service.

DID and DOD Addressing

This feature allows the system to use DID and DOD on the same B channels. Trunk Provisioning Service Selection is not required. (B-channels can be used for DID and DOD without separating the trunk routes.)

Service Conditions

1.Confirm the DID and DOD selection with the customer’s local exchange carrier prior to installation.

2.The DID/DOD is supported without service provisioning, since no facility indication to the network is required.

Note: For more details, refer to “Direct Inward Dialing” and “Direct Outward Dialing” in the Business Features and Specifications manual.

ISDN Terminal

This feature provides the system with an ISDN Terminal or Terminal Adapter (TA). ISDN Terminal to ISDN Terminal, ISDN Terminal to ISDN Trunk, ISDN Trunk to ISDN Terminal, ISDN Terminal to Single Line Telephone, ISDN Terminal to Multiline Terminal, and ISDN Terminal to PS connections are available.

Service Conditions

1.The ILC (ISDN Line Circuit) card and the ICH (ISDN Channel handler) card are required.

2.The ISDN Terminal must be locally powered.

3.The following connections are available:

Point to Point connection Point to Multipoint connection National ISDN 1

AT&T

4. The following features are available:

Individual Terminal Calling (Point to Multipoint connection) Group Calling (Point to Multipoint connection)

Called Party Recognition Service (DIT) DID Addressing

DID and DOD Addressing CPN to Network-Present

CPN to Terminating User-Display Sub Address-Present

Direct Outward Dialing (DOD) Restriction from outgoing call Toll restriction

Page 15-4

UNIVERGE NEAX 2000 IPS Request for Proposal (RFP) Reference Guide

 

Issue 6

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NEC 2000 IPS manual Did Addressing, Did and DOD Addressing, Isdn Terminal, At&T