module ieee802-dot1as-fttm {

    yang-version 1.1;

    namespace
      "urn:ieee:std:802.1AS:yang:ieee802-dot1as-fttm";

    prefix dot1as-fttm;

    import ieee1588-ptp-tt {
      prefix ptp-tt;
    }

    organization "IEEE 802.1 Working Group";

    contact
      "WG-URL: http://www.ieee802.org/1/
    WG-EMail: stds-802-1-L@ieee.org

    Contact: IEEE 802.1 Working Group Chair
    Postal: C/O IEEE 802.1 Working Group
    IEEE Standards Association
    445 Hoes Lane 
    Piscataway, NJ 08854
    USA

    E-mail: stds-802-1-chairs@ieee.org";

    description
      "This module provides for management of IEEE Std 802.1ASed components
    that support a fault-tolerant timing module.

    Copyright (C) IEEE (2024).
    This version of this YANG module is part of IEEE Std 802.1AS;
    see the standard itself for full legal notices.";

    revision "2024-09-02" {
      description
        "Published as part of IEEE Std 802.1ASed-2024.
	  
      The following reference statement identifies each referenced IEEE
      Standard as updated by applicable amendments.";
      reference
        "IEEE Std 802.1AS-2020 as modified by
        IEEE Std 802.1AS-2020/Cor-1-2021, and amended by
        IEEE Std 802.1ASdr, IEEE Std 802.1ASdn,
        IEEE Std 802.1ASdm,IEEE Std 802.1ASds, and IEEE Std 802.1ASed.";

    }


    feature fttm {
      description
        "This feature indicates that the device supports the Fault-tolerant
       timing module (FTTM) functionality.";
    }

    typedef fttm-output-trust-state {
      type enumeration {
        enum "NOT-TRUSTED" {
          value 0;
          description "Not trusted";
        }
        enum "TIME-TRUSTED" {
          value 1;
          description "Time trusted";
        }
        enum "FREQ-TRUSTED" {
          value 2;
          description "Frequency trusted";
        }
        enum "NOT_VALID" {
          value 3;
          description
            "The trust state is not valid";
        }
        enum "TRUST-STATE-4" {
          value 4;
          description
            "Trust state 4, reserved";
        }
        enum "TRUST-STATE-5" {
          value 5;
          description
            "Trust state 5, reserved";
        }
        enum "TRUST-STATE-6" {
          value 6;
          description
            "Trust state 6, reserved";
        }
        enum "TRUST-STATE-7" {
          value 7;
          description
            "Trust state 7, reserved";
        }
      }
      description
        "The fttmOutputTrustState type is an enumerated value that holds
      the output trust state of a TSF or of the FTTM.";
      reference
        "6.4.3.11 of IEEE Std 802.1ASed";

    }

    typedef uint48 {
      type uint64 {
        range "0..281474976710655";
      }
      description "Unsigned 48-bit integer.";
    }
  }  // module ieee802-dot1as-fttm