NEC nd-20292 manual LCR Program Construction

750.4LCR PROGRAM CONSTRUCTION

1.BLOCK DIAGRAM,

Figure 700-23 is a block diagram of the Electra Mark11with the LCR installed.

ND-20292

CHAPTER 7

APRIL, 1990

to the days of the week. These tables designate which Daily Table is to be referenced.

Dailv Tables

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Electra Markll

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Interface-

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LCR proper	I
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Sixty-four Daily Tables (00-631 are provided. Each tablecontains twenty four items that correspond to the hours in a day. These tables designate which Route Advance Table is to be referenced.

Route Advance Tables

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LCR Data	I	Programming
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Sixty-four Route Advance Tables (00-63) are provided. Each table can contain 4 entries (l-4)

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LCR-E ETU

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that correspond to which Route Tables will be

accessed [in priority order (l-411. The LCR

Figure 700-23 LCR Block Diagram

The LCR-E ETU contains the LCR subsystem section of the Electra MarkII.

The LCR subsystem selects the least cost route based on a request from the CPU and informs the CPU of the same.

The LCR subsystem is composed of the interface section and LCR proper section.

The interface section executes functions relating to the Electra MarkII. The LCR proper section contains the LCR data and executes functions such as least cost route selection and LCR data entry.

2.PROGRAM CONFIGURATION

LCR data is stored in the LCR proper section by the programming computer.

This section discusses how the LCR system data is configured.

The LCR proper section contains the following data

(see Figure 700-24 LCR System Data Configuration):

Area Code Tables

Three Area Code Tables (l-31 are provided (although there is a table 0, it cannot be used). When Tenant Service is used in the Electra Mark11 System, Area Code Tables l-3 are associated with Tenants l-3 respectively.

Each table contains 160 possible area codes and contains data that specifies which Weekly Table or which Route Advance Table is to be referenced when a given area code is dialed.

Weeklv Tables

Sixty-four Weekly Tables (00-63) are provided. Each table contains seven items, which correspond

subsystem will attempt to seize routes based on this order starting with the first. If this route is unavailable, the second route will be accessed, etc. If no route is available, or if a lower priority route is not specified, the user is denied access to the outside trunks.

Route Tables

Two hundred and ftity six Route Tables (000-2551 are provided. The specified Route Table will determine which Trunk Access code group will be selected and what digits are to be dialed to complete a call routed via LCR.

Each route table contains the following items:

A.Trunk Access Code Group (TRK ACSS CODE) A maximum of eight Trunk Access Code Groups are available. A Trunk Access Code Group (l-8) must be programmed in each Route Table for Trunk Group Selection.

B.Area Code Delete (AREA CODE DEL)

The LCR subsystem is Area Code Based. Therefore, an area code is required to route calls properly. Once a Route Table (and a trunk group) has been selected, depending on the types of trunk service provided, the area code may or may not be required to complete the call.

If, to complete the call on the selected trunk group, the area code must be deleted, then DEL should be programmed for Area Code Deletion. If the area code is required, then NO should be programmed and the area code will be included.

NOTE: LCR Always inserts the HOME NPA (Local Area Code) when local calls are assigned to be routed via LCR in System Programming.

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