Toshiba DK40I, dk14, DK424I manual 4-16, Plan

Toll Restriction

Program 45-1 – LCR/Toll Restriction Dial Plan

●The Strata DK System automatically restricts direct dialing of 10XXX+1 and 10XXXXX+1 access codes to any station that is toll restricted. These codes are allowed in system speed dial and LCR modified digit tables. This is necessary to control Long-Distance-Carrier access. 10XXX+0 and 10XXXXX+0 are allowed/denied depending on the station’s class and Program 46 (10~80) button/LED 01 assignment.

Pre-January 1995 North American Numbering Plan (NANP)

Plans 1~6 use numbering plans for systems that do not use the NANP established January, 1995. DK14, DK40i, and all DK424 and DK424i processors provide plans 1~9.

Long Distance Prefix 1 in most areas must be the first digit dialed for long distance calling. In such areas, the area code is dialed right away. The dial plan defines whether the prefix 1 is required for a particular installation’s long distance calling.

Area/Office Code Numbering Schemes—In most places, the middle digit of an area code is 0 or 1, and the middle digit of an office code is 2~9. Toll Restriction examines the first three-digit sequence dialed and determines whether it is an area code or an office code.

♦If the middle digit is 0 or 1, then the sequence is an area code.

♦If the middle digit does not equal 0 or 1, then the sequence is an office code, and the office code parameters of the selected dialing plan apply.

An exception to this rule exists. In some places, area and office codes are interchangeable. The middle digit is always 0 or 1 (see Code 3 selection). In such a case, the system only knows that three digits dialed are an area code if 1 is dialed before them. If 1 is not dialed first, the system knows the three digits are an office code. The dial plan defines the numbering scheme applicable to the installation site.

Special Common Carrier Number and Digit Length - for SPCC numbers of the form 950- XXXX, this program can allow credit card calling but will restrict the maximum number of digits dialed to prevent defeat of Toll Restriction.

Plan 1

Older Strata DK Systems use Plan 1 for dialing plan AC+NXX/1+NNX if the installation is in a location where a user places a long distance call to a destination outside the area code without dialing 1 before dialing the area code. The user places a long distance call to a destination in the same area code by dialing 1 directly before the office code.

♦The first three digits of a ten-digit number is an area code if the middle digit is 0 or 1.

♦Pressing the first three digits immediately after a 1 in an eight-digit string is an office code

♦A seven-digit string starting with an office code is a local call.

Plan 2

♦Plan 2 is 1+AC+NXX/1+NNX. Use this plan where a user places a long distance call to a destination outside the area code by dialing a 1 before dialing the area code. The user places a long distance call to a destination in the same area code by dialing a 1 directly before the office code

♦When using this plan, the system recognizes the following:

♦The first three digits following a 1 in an 11-digit number are an area code, if the middle digit is 0 or 1.

♦The first three digits dialed immediately after a 1 in an eight-digit string is an office code.

4-16 Strata DK Programming 5/00