Lucent Technologies 8.2

DEFINITY ECS Release 8.2

Administrator’s Guide

555-233-506 Issue 1

April 2000

Features and technical reference

1384IP trunk service

Restricting access

When DEFINITY IP Trunk application is installed and configured, it can receive

calls from any IP address. You can restrict access to your site using Access

Control on the Dial/Routing Plan property page of Configuration Manager. This

allows you to specify the IP addresses (either specific or subnet) that can access

your system through the DEFINITY IP Trunk application. This restriction on

access can be enabled for other DEFINITY ECS systems (gateways) and

NetMeeting™ PCs (clients).

The DEFINITY IP Trunk application can also block outgoing calls based on the

analysis of the number dialed. For example, you can use Originating Routing Info

on the Dial/Routing Plan property page of Configuration Manager to block all

phone numbers that start with 1-900.

Reducing long-distance costs with off-premise

dialing

Normally, only calls going to a switch with a DEFINITY IP T runk ap plica tion ar e

routed over IP networks. However, DEFINITY ECS supports off-premise dialing.

Calls not intended for a remote switch can be routed over the IP network to that

switch, which then routes the calls over the public telephone network to the final

destination. This helps you significantly reduce long-distance costs.

For example, suppose there is a DEFINITY ECS with the DEFINITY IP Trunk

application in Tokyo and another one in New York. A user can make a call to New

Jersey from Tokyo by sending the call from Tokyo to New York over the IP

network. The New York switch sends the call o ver the publ ic telephone net work to

New Jersey, greatly reducing the long-distance expense.

If you want users to dial the same telephone numbers for off-premise dialing as

for direct dialing, you have to administer the origin and destination switches to

manipulate the digit string. For example, the fo llowing chart illustrates different

possible originating and terminating locations for calls to a DEFINITY IP Trunk

application site, labeled as Terminating Site-1.

Destination IP

trunk

application

Receives a connection indication and the digits sent by the

origin IP trunk application. Performs any local digit

translations and delivers the call to the destination switch.

Destination

switch Detects the incoming call and receives digits. Rings the

phone associated with that number.

Called party Answers the call.