Initiation in Systems Without Previous LCR Tables

This section describes the execution steps in those systems that do not use the LCR function in their current configurations. The LCR function must now be initiated to support the different emergency number formats.

Prerequisites

Execution

This configuration requires the use of LCR tables.

The following steps must be carried out:

Step 1. Change the existing public destination configuration
Since the public access code (for example, 00) is going to be initiated as an LAC (Step 3 below), the public destination must be removed. It must also be removed from the External Destination number series. An auxiliary access code (for example, 10) must be added to the External Destination number series to replace it. The auxiliary destination must be associated to the public route with the same data that the actual public destination had.

See the operational directions for ROUTE DATA and see the operational directions for NUMBER ANALYSIS.

Notice that users can keep on dialing the public access code used so far to reach the public network for any type of call, either emergency or other. The auxiliary public access code will be reached as a result of applying LCR table translations to the usual public access code (Step 4 below).

Step 2. Initiate an emergency destination
The access code to be used as emergency destination is initiated in the External Destination number series and associated to the public route (see Initiation of an Emergency Destination).

Step 3. Initiate the LACs
In order for the user to dial the emergency number with or without the route access code to PSTN, the public access code (for example, 00) and the emergency number must be defined as LACs. Use NA commands as described in the operational directions for NUMBER ANALYSIS.

Step 4. Initiate LCR table with new entries
New entries must be initiated in the LCR tables for the public access code and for the emergency number (with and without leading route access code to PSTN). The tables must be initiated in the following manner:
- When emergency number is dialed alone, the translation must lead to the emergency destination.
- When public access code is followed by the emergency number, the translation must lead to the emergency destination.
- When public access code is followed by any other number (that is, a public number is dialed), the translation must lead to the auxiliary public access code.

Use LCDDx commands to compose the LCR tables as described in the operational directions for LEAST COST ROUTING.

Example 1

The public access code is 00. The route to PSTN is route 99. The emergency number is 112, so it can be dialed as 112 or 00112. An auxiliary destination is chosen among free numbers, for example, 10. An emergency destination is chosen among free numbers, for example, 23.

Step 1. Change the existing public destination configuration

RODDP:DEST=00; (Make note of the destination data).

RODDE:DEST=00;

number_end -numbertype ed -number 00

number_initiate -numbertype ed -number 10

RODDI:DEST=10,ROU=99,...;

Set the same destination data as it was for 00. Notice that the SRT, TRC, and PRE parameters may need different values in order to compound the called party number in the form required by the PSTN (for example, leading 0).
Step 2. Initiate the emergency destination

number_initiate -numbertype ed -number 23

RODDI:DEST=23,ROU=99,SRT=3,ADC=0305000000000050005000010100;

Notice that the SRT, TRC, and PRE parameters may need specific values in order to compound the called party number in the form required by the PSTN (for example, leading 0).
Step 3. Initiate the LACs

number_initiate -numbertype lc -number 00

number_initiate -numbertype lc -number 112
Step 4. Initiate the LCR tables with the new entries

LCDDI:TAB=ENT,ENTRY=00;

LCDDI:TAB=FDT,FRCT=1,PRE=23,TZONE=1&&3;

LCDDI:TAB=FDT,FRCT=2,PRE=10,TZONE=1&&3;

LCDDI:TAB=DNT1,ENTRY=112,FRCT=1;

LCDDI:TAB=DNT1,ENTRY=00112,TRC=2,FRCT=1;

LCDDI:TAB=DNT2,ENTRY=00,TRC=2,FRCT=2;

Example 2

The public access code is 9. The route to PSTN is route 99. The emergency number is 911, so it can be dialed as 911 or 9911. An auxiliary destination is chosen among free numbers, for example, 10. An emergency destination is chosen among free numbers, for example, 23.

Step 1. Change the existing public destination configuration
RODDP:DEST=9; (Make note of the destination data).

RODDE:DEST=9;

number_end -numbertype ed -number 09

number_initiate -numbertype ed -number 10

RODDI:DEST=10,ROU=99,...;

Set the same destination data as it was for 9. Notice that the SRT, TRC, and PRE parameters may need different values in order to compound the called party number in the form required by the PSTN (for example, leading 0).
Step 2. Initiate the emergency destination

RODDI:DEST=23,ROU=99,SRT=3,ADC=0305000000000050005000010100; Notice that the SRT, TRC, and PRE parameters may need specific values in order to compound the called party number in the form required by the PSTN (for example, leading 0).
Step 3. Initiate the LAC

number_initiate -numbertype lc -number 09
Step 4. Initiate the LCR tables with the new entries

LCDDI:TAB=ENT,ENTRY=911;

LCDDI:TAB=ENT,ENTRY=9911,TRC=1;

LCDDI:TAB=FDT,FRCT=1,PRE=23,TZONE=1&&3;

LCDDI:TAB=FDT,FRCT=2,PRE=10,TZONE=1&&3;

LCDDI:TAB=DNT1,ENTRY=911,FRCT=1;

LCDDI:TAB=DNT2,ENTRY=9,FRCT=2,TRC=1;

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