ND-20292
APRIL, 1990
CHAPTER 7 LEAST COST ROUTING (LCR)

TABLE OF CONTENTS

SECTION DESCRIPTION PAGE SECTION DESCRIPTION PAGE

710 GENERAL

700-l

760 ALGORITHMS

720 EQUIPMENT IDENTIFICATION

720.1 General 700-2
720.2 LCR-E ETU 700-2
720.3 Programming Computer 700-2

730 INSTALLATION OF LCR-E ETU

730.1
730.2
730.3
730.4
730.5
730.6
730.7
730.8
General
Installation of LCR-E ETU
Switch SW1 Setting
Switch DIP1 Setting
Switch SW2 Setting
Routing the RS-232C Cable
Mounting the RS-232C
Connector
Verifying SW2 Setting
700-4
700-5
700-5
700-5
700-6
700-6
700-6
700-6

740 INSTALLATION OF PC-8300

740.1 General 700-6
740.2 AC Power Adapter 700-6
740.3 Battery Backup 700-7
740.4 Floppy Disk Unit PC-8231A
Connection 700-7
740.5 Printer Connection 700-8
740.6 PC-8300 Connection
To LCR-E ETU 700-8

750 PROGRAMMING

750.1 General
750.2 How To Use This Section
750.3 Programming System NPM
for LCR
750.4 LCR Programming Construction
750.5 Initializing the PC-8300
750.6 Initializing IBM Compatible PCs
750.7 Programming the LCR-E ETU
750.8 Input of Data
750.9 Explanation of LCR Commands
750.10 Error Messages
700-9
700-9
700-9
700-13
700-17
700-19
700-20
700-29
700-33
700-57
The LCR feature provided with the Electra Mark11
Digital Telephone System can select lines, such as FX
(Foreign Exchange), SCC (Specialized Common
Carrier), Outward WATS (Wide Area
Telecommunications Service), DDD (Direct Distance
Dial), and Tie lines. LCR directs the calls through the
least expensive route, based on the number dialed, the
time of day, and the day of the week, as previously
programmed in the LCR package.
LCR cannot access CCSA (Common Control Switching
Arrangement) lines or incoming only lines such as DID
(Direct Inward Dial) or Inward WATS lines. In
addition, the LCR feature cannot be used to place
operator, credit card, international, or uniform dialing
calls. Manually selecting a trunk bypasses LCR.
700 - 1
760.1 CPU Processing for LCR 700-59
760.2 LCR Processing 700-60

770 JOB SPEC SAMPLES

770.1
770.2
770.3
770.4
770.5
770.6
770.7
Area Code Tables
Weekly Schedule Tables
Daily Schedule Tables
Route Advance Tables
Route Tables
Office Code Tables
Extra Code Tables and
Home NPA
700-64
700-68
700-70
700-72
700-74
700-76
700-78

SECTION 710

GENERAL

The Least Cost Routing (LCR) feature is used by the
system to select the most economical route (line) when
originating outside calls.
The Electra Mark11 provides this feature as an option
and requires the installation of an LCR-E ETU.
Additionally, a portable computer PC-82OlA/PC-8300
or APC IV manufactured by NEC Corporation (or
equivalent) is required to program the LCR feature.