Lucent Technologies 555-661-150 manual Uniform Dial Plans

MERLIN LEGEND Communications System Release 6.1	Issue 1
Network Reference 555-661-150	August 1998
1 Introduction
Uniform Dial Plan	Page 1-20

plan has two sets of extension ranges, both of which include routing information that directs the call to the same private network trunk. This tandem PRI trunk connects the New Jersey system to the Illinois system. In the non-local dial plan, one extension range specifies the extensions on the system in Illinois, while the other includes the extensions on the system in California.

When the call reaches the Illinois system, that system also checks the local dial plan and then the non-local dial plan. It routes the call over a second tandem PRI trunk to the California system. The system in California searches its local dial plan, finds a match, and directs the call to Extension 3400.

x1000

Local

Dial Plan

1000

1037

Non-Local

Dial Plan

2020

2071

3200

3459

LEGEND NJ

x2030

PRI

Local

Dial Plan

2020

2071

Non-Local

Dial Plan

1000

1037

3200

3459

LEGEND IL

PRI

Local

Dial Plan

3200

3459

Non-Local

Dial Plan

1000

1037

2020

2071

LEGEND CA

x3400

Figure 1–8. Uniform Dial Plans

Each system has its own local system operator, and dialing 0 calls the operator on the local switch. Users can reach an operator on another private network system by dialing that operator’s extension number. Alternatively, Listed Directory Number (LDN) calls from one system to another private network system can be routed to the destination system’s Queued Call Console (QCC) operator.