scope:

This Interim European Telecommunication Standard (I-ETS) describes a binary signalling and data transmission system for private radio equipment operating at 1 200 bit/s using indirect modulation.

This I-ETS applies to systems operating on either shared, or exclusive, channels.

According to national regulations of various countries, Public Switched Telephone Network (PSTN) access and data transmission may be subject to licensing. The channel access protocol and occupation rules can also be a matter for licensing, depending on the different national regulations.

This I-ETS may be implemented only in parts. Where parts, or options, of this I-ETS are implemented, the requirements of this I-ETS shall be met. Conversely the bits specified in this I-ETS for options which are not implemented, shall not be used for any other purposes.

Fields that have been reserved to provide for future extensions to this I-ETS shall not be used. Finally, fields have been defined as free for custom specific applications and are not further defined in this I-ETS.

This I-ETS permits the addition, if necessary, of supplementary signalling, either sub-audio, multitone, or binary, as appropriate, to permit primary and secondary paging to be used. This I-ETS does not attempt to define the protocols necessary for such supplementary signalling.

Where parameters relating to the radio environment are specified, reference should be made to the appropriate Clauses of I-ETS 300 113 [3]. However, selective calls according to this I-ETS can be implemented in equipment fulfilling I-ETS 300 219 [2] (that is messages of categories 0, 2, 4, 5 and messages of category 1 and functions 0, 1 and 2 as defined in subclause 7.2 of this I-ETS).