BusinessPhone Communication Platform 5.1
Commands > Commands 2000...2999

## 2201
Open number interval

Trunk call discrimination is a function that determines which extensions (and incoming external lines) are allowed to call external destinations.

With commands 0103 TCD-day COS, 0104 TCD-night COS, 1003 TCD-day COS and 1004 TCD-night COS extensions and external lines are given one of 9 TCD categories. Category 0 is open for all numbers, while categories 1-8 are analysed according to TCD.

With this command, 100 number ranges can be opened for outgoing traffic. Each number range can include one number interval or one single number.

#### Syntax

- nnn,mmm:
  where nnn and mmm are two numbers containing the same number of digits, and mmm >= nnn.

If the system has only one route, there is no need to include the access code of the route in the number interval. In this case command 1015 Pre-digits for number analysis does not define predigits for TCD analysis of the route.

However, if the system has several routes with the same or partly the same directory number, predigits for TCD analysis must be defined by command 1015 Pre-digits for number analysis. In this case the access codes for the routes must be included in the number interval.

Examples:

1 A |  | system with one route (call number 0). All external numbers not beginning with 0 shall be open. Also routing codes beginning with 07 shall be open. |
|  | The following directions need to be inserted: |
|  | 07, 07 |
|  | 01, 09 |
|  | No predigits for TCD-analysis shall be defined by command 1015 Pre-digits for number analysis. |

2 A |  | system with two routes. The first route has call number 0, the permitted external numbers being the same as in the preceding example. The second route has call number 1. All external numbers beginning with 4, 6 or 7 are open on this route. |
|  | The following directions need to be inserted: |
|  | 007, 007 |
|  | 01, 09 |
|  | 14, 14 |
|  | 16, 17 |
|  | For external lines in the first route, 0 is inserted as first digit for TCD-analysis by means of command 1015 Pre-digits for number analysis. For external lines in the second route 1 is inserted as predigit. |

The programmed numbers are checked for the following:

- the number intervals have the same number of digits
- no overlapping of two number intervals
  Example: If number range 100, 150 has already been programmed, number range 130, 170 or 11, 13 cannot be programmed.
- the second number in the number interval is higher than or the same as the first number.

If an existing number interval shall be altered, it is permissible to decrease the number interval. It is, however, not possible to expand the number interval. Therefore, first the existing interval has to be erased, and then the new interval may be inserted. At the same time a check as mentioned above has to be made.

Commands 2202 Open for TCD category 1-2209 Open for TCD category 8 are utilised to determine which of the categories 1-8 shall be open for the range.

Minimum required authority level from telephone: 1

Accessible via BMS: Yes

Revision: E © Ericsson Enterprise 2003