Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2010

e) Invalid frame. An invalid frame is one that is not properly bounded by two flags or one which is shorter than 32 bits between flags. 8.6.4.2.5 MODES 8.6.4.2.5.1 Operational mode. The operational mode shall be the asynchronous balanced mode (ABM). 8.6.4.2.5.1.1 It shall be permissible for a combined station in ABM to transmit without invitation from the associated station. 8.6.4.2.5.1.2 A combined station in ABM shall be permitted to transmit any command or response type frame except DM. 8.6.4.2.5.2 Non-operational mode. The non-operational mode shall be the asynchronous disconnected mode (ADM) in which a combined station is logically disconnected from the data link. 8.6.4.2.5.2.1 It shall be permissible for a combined station in ADM to transmit without invitation from the associated station. 8.6.4.2.5.2.2 A combined station in ADM shall transmit only SABM, DISC, UA and DM frames. (See 8.6.4.2.7 for a description of the commands and responses to which these frame types refer.) 8.6.4.2.5.2.3 A combined station in ADM shall transmit a DM when a DISC is received, and shall discard all other received command frames except SABM. If a discarded command frame has the P bit set to “1”, the combined station shall transmit a DM with the F bit set to “1”. 8.6.4.2.6 Control field functions and parameters. Control fields contain a command or a response and sequence numbers where applicable. Three types of control fields shall be used to perform:

Source: https://magyarkozlony.hu/hivatalos-lapok/1f7c6b0e16b4b71a92e5ad24416008bbe2e26aab/dokumentumok/710811d1f7f958a2990684d0cbf918e84f5497e5/letoltes