ITU-T Z.312 PDF

General

To facilitate filing and retrieval of recorded information in MML, it is recommended that this information should be recorded on pages with an identification header at the top of each page. The top and bottom lines of a page should not be used but should be left blank.

It is further recommended that the layout for printing information in MML should be based on a maximum of 72 characters per line and 66 lines per page, as this format can be accommodated on both the A4 and the 11-inch standard size paper and can be printed by standard teletypewriters.

Where a number of characters per line in excess of 72 is required, a second format is recommended. This accommodates 120 characters per line and would be used, for example, on line printers.

In order to save paper or where paging to facilitate filing of output is not required, paging may be suppressed by suppressing the generation of all superfluous line feeds.

To distinguish between the formats recommended, they are further indicated as format F1 for the paper sizes A4 and A5L and format F2 for the paper size A4L. In the recommended formats specified below, International Standard ISO/2784 [1] has been taken into account.