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This Standard is an optional extension of Standard ECMA-16 on Basic Mode Control Procedure for Data Communication Systems.
This means that:
- Those systems which conform to Standard ECMA-16 do not necessarily have to include the functions in the following Standard.
- Those systems implementing the functions described hereafter must comply with the present Standard to conform to Standard ECMA-16 on Basic Mode Control Procedures.
This Standard defines a Conversational Information Transfer as an extension to the Basic Mode Control Procedures for Data Communication Systems using Information Transfer either 7-bit coded or code independent. This Standard refers only to those classes of systems using acknowledgements, i.e. ACK and NAK.