 CONST
    nac$max_queued_cn_messages = 0ffff(16);

 TYPE
    nat$open_cn_sap_descriptor = record
      link: ^nat$open_cn_sap_descriptor,
      sap_id: nat$cn_sap_id,
      sap_owner: ost$global_task_id,
      max_data_length: nat$data_length,
      queued_messages: 0 .. nac$max_queued_cn_messages,
      event_queue: ^nat$cn_event,
      waiting_task: boolean,
    recend,

    nat$cn_event = record
      link: ^nat$cn_event,
      device: nlt$device_identifier,
      source: nat$system_address,
      message_id: nlt$bm_message_id,
    recend;

*copyc nat$cn_interface
*copyc nat$data_fragments
*copyc nat$network_address
*copyc nlt$bm_message_id
*copyc nlt$device_identifier
*copyc ost$global_task_id
