Use this field to specify how the system must punctuate extensions for inter-location and intra-location displays. Blank spaces are sometimes used in telephone extensions, especially outside of the U.S. Dots (.) are used on SAT screens in place of blanks.
The number of punctuation marks that you can use is determined by the number of xs in the format:
If the format contains fewer than six xs, there can be no punctuation marks.
If the format contains six or more xs, the maximum number of punctuation marks is determined by the following table.
Extension length |
Maximum punctuation marks |
Maximum total length |
6 |
2 |
8 |
7 |
1 |
8 |
8 |
3 |
11 |
9 |
3 |
12 |
10 |
3 |
13 |
11 |
2 |
13 |
12 |
1 |
13 |
13 |
0 |
13 |
14 |
0 |
14 |
15 |
0 |
15 |
16 |
0 |
16 |
Valid entry |
Usage |
xx.xx.xx blank |
For six or more xs, characters can contain:
|
