submodule bbf-fast-line-status-body {

    yang-version 1.1;

    belongs-to bbf-fast {
        prefix bbf-fast;
    }

    import bbf-yang-types {
      prefix bbf-yang;
    }
    import ietf-yang-types {
      prefix yang;
    }

    include bbf-fast-line-spectrum-profile-body;
    include bbf-fast-base;

    organization
      "Broadband Forum <https://www.broadband-forum.org>
Common YANG Work Area";

    contact
      "Comments or questions about this Broadband Forum YANG module
should be directed to <mailto:help@broadband-forum.org>.

Editor:      Ken Kerpez, ASSIA, Inc.

Editor:      Joey Boyd, Adtran

PS Leader:   Joey Boyd, Adtran

WA Director: Sven Ooghe, Nokia

WA Director: Joey Boyd, Adtran";

    description
      "This submodule contains a collection of status-related YANG
data types and grouping definitions for the management of
FAST lines.

Copyright (c) 2016-2022 Broadband Forum

Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above
   copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials
   provided with the distribution.

3. Neither the name of the copyright holder nor the names of its
   contributors may be used to endorse or promote products
   derived from this software without specific prior written
   permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The above license is used as a license under copyright only.
Please reference the Forum IPR Policy for patent licensing terms
<https://www.broadband-forum.org/ipr-policy>.

Any moral rights which are necessary to exercise under the above
license grant are also deemed granted under this license.

This version of this YANG module is part of TR-355a4; see
the TR itself for full legal notices.";

    revision "2022-05-23" {
      description
        "Amendment 4.
* Approval Date:    2022-05-23
* Publication Date: 2022-05-23.";
      reference
        "TR-355a4: YANG Modules for FTTdp Management
        	    <https://www.broadband-forum.org/download/
        		   TR-355_Amendment-4.pdf>";

    }

    revision "2020-10-13" {
      description
        "Amendment 3.
* Approval Date:    2020-10-13
* Publication Date: 2020-10-13.";
      reference
        "TR-355a3: YANG Modules for FTTdp Management
        	    <https://www.broadband-forum.org/download/
        		   TR-355_Amendment-3.pdf>";

    }

    revision "2020-01-17" {
      description
        "Amendment 2 Corrigendum 2.
* Approval Date:    2020-01-17
* Publication Date: 2020-01-17.";
      reference
        "TR-355a2c2: YANG Modules for FTTdp Management
        	    <https://www.broadband-forum.org/download/
        		   TR-355_Amendment-2.pdf>";

    }

    revision "2019-10-21" {
      description
        "Amendment 2 Corrigendum 1.
* Approval Date:    2019-10-21
* Publication Date: 2019-10-21.";
      reference
        "TR-355a2c1: YANG Modules for FTTdp Management
        	    <https://www.broadband-forum.org/download/
        		   TR-355_Amendment-2.pdf>";

    }

    revision "2019-06-11" {
      description
        "Amendment 2.
* Approval Date:    2019-06-11
* Publication Date: 2019-06-11.";
      reference
        "TR-355a2: YANG Modules for FTTdp Management
        	  <https://www.broadband-forum.org/technical/download/
        		 TR-355_Amendment-2.pdf>";

    }

    revision "2018-10-01" {
      description
        "Amendment 1.
* Approval Date:    2018-10-01
* Publication Date: 2018-10-01.";
      reference
        "TR-355a1: YANG Modules for FTTdp Management
        	  <https://www.broadband-forum.org/technical/download/
        		 TR-355_Amendment-1.pdf>";

    }

    revision "2017-11-27" {
      description
        "Corrigendum 2 (fixes to the previous revision).
* Approval Date:    see revision date above.
* Publication Date: 2018-01-19.";
      reference
        "TR-355c2: YANG Modules for FTTdp Management
        	  <https://www.broadband-forum.org/technical/download/
        		 TR-355_Corrigendum-2.pdf>";

    }

    revision "2017-03-13" {
      description
        "Corrigendum 1 (fixes to the initial revision).
* Approval Date:    see revision date above.
* Publication Date: 2017-04-12.";
      reference
        "TR-355c1: YANG Modules for FTTdp Management
        	  <https://www.broadband-forum.org/technical/download/
        		 TR-355_Corrigendum-1.pdf>";

    }

    revision "2016-07-18" {
      description
        "Initial revision.
* Approval Date:    see revision date above.
* Publication Date: 2016-08-05.";
      reference
        "TR-355: YANG Modules for FTTdp Management
        	<https://www.broadband-forum.org/technical/download/
        		 TR-355.pdf>";

    }


    typedef sub-carrier-group-index {
      type sub-carrier-index;
      description
        "Identifies a sub-carrier group.";
    }

    typedef sub-carrier-group-size {
      type uint8 {
        range "1 | 2 | 4 | 8";
      }
      units "sub-carriers";
      description
        "Reports the number of sub-carriers in any one sub-carrier
group.";
    }

    typedef snr-margin {
      type union {
        type bbf-yang:undetermined;
        type int16 {
          range "-511..511";
        }
      }
      units "0.1 dB";
      description
        "Reports the signal-to-noise ratio margin. A first special value
(undetermined) indicates that the signal-to-noise ratio margin
is undetermined. A second special value (-511) indicates that
the signal-to-noise ratio margin is less than or equal to -51.1
dB. A third special value (+511) indicates that the
signal-to-noise ratio margin is greater than or equal to
+51.1 dB.";
    }

    typedef vce-port-index {
      type union {
        type enumeration {
          enum "undefined" {
            value 0;
            description
              "The value of the Vectoring Control Entity (VCE) port
index is undefined.";
          }
        }
        type uint16 {
          range "1..65535";
        }
      }
      description
        "For the line in a vectored group, the Vectoring Control Entity
(VCE) port index is the physical index that uniquely identifies
the VCE port to which the line is connected. It is an integer
from 1 to the maximum number of lines supported by the VCE.";
    }

    typedef per-sub-carrier-nibble {
      type binary {
        length "0..2048";
      }
      description
        "A binary type where each nibble represents data belonging to
a sub-carrier. The first nibble represents sub-carrier 0 and
the last represents sub-carrier 4095.";
    }

    typedef per-sub-carrier-uint8 {
      type binary {
        length "0..4096";
      }
      description
        "A binary type where each octet represents data belonging to
a sub-carrier. The first octet represents sub-carrier 0 and
the last represents sub-carrier 4095.";
    }

    typedef per-sub-carrier-group-uint8 {
      type binary;
      description
        "A binary type where each octet represents data belonging to
a sub-carrier group. The first octet represents sub-carrier
group 0.";
    }

    typedef per-sub-carrier-group-uint16 {
      type binary;
      description
        "A binary type where each pair of octets represents data
belonging to a sub-carrier. The first two octets represents
sub-carrier 0. In each pair of octets, the most significant
byte is loaded first.";
    }

    typedef time-stamp-or-undefined {
      type union {
        type enumeration {
          enum "undefined" {
            value 0;
            description
              "The value of the time stamp is undefined or unknown.";
          }
        }
        type yang:date-and-time;
      }
      description
        "The date/time associated with a particular time stamp. The
special value, 'undefined', is used when the event represented
by the time stamp has not yet occurred.";
    }

    grouping line-status-parameters {
      description
        "Line status parameters applicable to both upstream and
downstream.";
      reference
        "ITU-T G.997.2 clause 7.10";

      leaf snr-margin {
        type snr-margin;
        description
          "Reports the signal-to-noise ratio (SNR) margin in the
applicable direction during the L0 link state. A first
special value (undetermined) indicates that the
signal-to-noise ratio margin is undetermined. A second
special value (-511) indicates that the signal-to-noise ratio
margin is less than or equal to -51.1 dB. A third special
value (+511) indicates that the signal-to-noise ratio margin
is greater than or equal to +51.1 dB.";
        reference
          "ITU-T G.997.2 clauses 7.10.3.1 (SNRMds) and 7.10.3.2
          (SNRMus);
          ITU-T G.9701 clauses 9.8.3.2 and 11.4.1.3.";

      }

      leaf snr-margin-in-l2.1 {
        type snr-margin;
        description
          "Reports the signal-to-noise ratio (SNR) margin during the
L2.1N and L2.1B link states. A first special value
(undetermined) indicates that the signal-to-noise ratio
margin is undetermined. A second special value (-511)
indicates that the signal-to-noise ratio margin is less than
or equal to -51.1 dB. A third special value (+511) indicates
that the signal-to-noise ratio margin is greater than or
equal to +51.1 dB.";
        reference
          "ITU-T G.997.2 clauses 7.10.16.1 (L2.1-SNRMds) and 7.10.16.2
          (L2.1-SNRMus);
          ITU-T G.9701 clauses 9.8.3.2 and 11.4.1.1.10.";

      }

      leaf snr-margin-in-l2.2 {
        type snr-margin;
        description
          "Reports the signal-to-noise ratio (SNR) margin in the
downstream direction during the L2.2 link state. A first
special value (undetermined) indicates that the
signal-to-noise ratio margin is undetermined. A second
special value (-511) indicates that the signal-to-noise ratio
margin is less than or equal to -51.1 dB. A third special
value (+511) indicates that the signal-to-noise ratio margin
is greater than or equal to +51.1 dB.";
        reference
          "ITU-T G.997.2 clauses 7.10.16.3 (L2.2-SNRMds) and 7.10.16.4
          (L2.2-SNRMus);
          ITU-T G.9701 clauses 9.8.3.2 and 11.4.1.1.10";

      }

      leaf upbo-electrical-length {
        type uint16 {
          range "0..1280";
        }
        units "0.1 dB";
        description
          "Reports the electrical length that would have been sent, if
the electrical length was not forced. If the electrical
length is not forced, then this data node reports the final
electrical length, as determined by the FAST Transceiver Unit
(FTU) and conveyed in the O-UPDATE or R-MSG1 initialization
message accordingly.";
        reference
          "ITU-T G.997.2 clauses 7.10.4.1 (UPBOKLE) and 7.10.4.2
          (UPBOKLE-R);
          ITU-T G.9701 clauses 7.3.1.4.2.1, 9.8.3.2, 11.4.1.3 and
          12.3.3.2.4";

      }

      leaf actual-aggregate-transmit-power {
        type union {
          type bbf-yang:undetermined;
          type int16 {
            range "-311..311";
          }
        }
        units "0.1 dB";
        description
          "Reports the total amount of transmit power delivered by the
FAST Transceiver Unit (FTU) at the U reference point, at the
instant of measurement. A first special value (undetermined)
indicates that the transmit power is undetermined. A second
special value (-311) indicates that the transmit power is
less than or equal to -31.1 dBm. A third special value (+311)
indicates that the transmit power is greater than or equal to
+31.1 dBm.";
        reference
          "ITU-T G.997.2 clauses 7.10.5.1 (ACTATPds) and 7.10.5.2
          (ACTATPus);
          ITU-T G.9701 clauses 9.8.3.2 and 11.4.1.5";

      }

      leaf actual-tx-psd-ps {
        type per-sub-carrier-uint8;
        description
          "Reports the transmit Power Spectral Density (PSD) per
sub-carrier delivered by the FAST Transceiver Unit (FTU) at
the U reference point as calculated by the Vector Control
Entity (VCE) from the appropriate ACTPSDREF-ps.

For each octet, the values 0 to 254 represent the PSD values
of 0 to -127 dBm/Hz in steps of -0.5 dBm/Hz.

A special value, 255,indicates that no transmit PSD value is
available the sub-carrier, or its transmit power is zero, or
is out of the range to be represented.";
        reference
          "ITU-T G.997.2 clauses 7.10.6.1 (ACTPSDpsds) and 7.10.6.2
          (ACTPSDpsus);
          ITU-T G.9701 clause 11.4.1.2.5";

      }

      container snr {
        description
          "State data nodes related to sub-carrier Signal-to-Noise
Ratio (SNR) values.";
        leaf snr-psd-measurement-time {
          type uint16;
          units "symbols";
          description
            "Reports the number of symbols used to measure the SNR(f)
values.";
          reference
            "ITU-T G.997.2 clauses 7.10.8.1 (SNRMTds) and 7.10.8.4
            (SNRMTus);
            ITU-T G.9701 clause 11.4.1.2.2";

        }

        leaf snr-sub-carrier-group-size {
          type sub-carrier-group-size;
          description
            "Reports the number of sub-carriers in any one sub-carrier
group used to represent the SNR(f) values.

Note that in ITU-T G.9701-2014 the only valid value is
G = 1.";
          reference
            "ITU-T G.997.2 clauses 7.10.8.2 (SNRGds) and 7.10.8.5
            (SNRGus);
            ITU-T G.9701 clause 11.4.1.2.2";

        }

        leaf snrps {
          type per-sub-carrier-group-uint8 {
            length "0..4096";
          }
          description
            "Reports the downstream SNR(f) values.

For each octet, the values 0 to 254 represent the Signal-
to-Noise Ratio (SNR) values of -32 to 95 dB in steps of
0.5 dB and an offset of -64 where:

  SNR(f) = (snrps - 64) * 0.5

A special value, 255, indicates the cases defined
in clause 11.4.1.2.2 of [ITU-T G.9701].";
          reference
            "ITU-T G.997.2 clauses 7.10.8.3 (SNRpsds) and 7.10.8.6
            (SNRpsus);
            ITU-T G.9701 clause 11.4.1.2.2";

        }
      }  // container snr

      leaf bitsps {
        type per-sub-carrier-nibble;
        description
          "Reports the bit allocation values on data symbols in the
normal operation interval (NOI).

For each nibble, the values 0 to 14 represent the allocated
bits.";
        reference
          "ITU-T G.997.2 clauses 7.10.11.1 (BITSpsds) and 7.10.11.2
          (BITSpsus);
          ITU-T G.9701 clause 10.2.1.4";

      }

      container robust-management-channel {
        description
          "Managment data nodes associated with the Robust Management
Channel (RMC).";
        leaf snr-margin {
          type snr-margin;
          description
            "Reports the signal-to-noise ratio (SNR) margin for the
Robust Management Channel (RMC) in the applicable direction
during the L0 link state. A first special value
(undetermined) indicates that the signal-to-noise ratio
margin is undetermined. A second special value (-511)
indicates that the signal-to-noise ratio margin is less
than or equal to -51.1 dB. A third special value (+511)
indicates that the signal-to-noise ratio margin is greater
than or equal to +51.1 dB.";
          reference
            "ITU-T G.997.2 clauses 7.10.12.1 (SNRM-RMCds) and
            7.10.12.2 (SNRM-RMCus);
            ITU-T G.9701 clauses 11.4.1.1.11 and 11.4.1.4";

        }

        leaf snr-margin-in-l2 {
          type snr-margin;
          description
            "Reports the signal-to-noise ratio (SNR) margin  for the
Robust Management Channel (RMC) during the L2.1N, L2.1B and
L2.2 link state. A first special value (undetermined)
indicates that the signal-to-noise ratio margin is
undetermined. A second special value (-511) indicates that
the signal-to-noise ratio margin is less than or equal to
-51.1 dB. A third special value (+511) indicates that the
signal-to-noise ratio margin is greater than or equal to
+51.1 dB.";
          reference
            "ITU-T G.997.2 clauses 7.10.16.5 (L2-SNRM-RMCds) and
            7.10.16.6 (L2-SNRM-RMCus);
            ITU-T G.9701 clauses 11.4.1.1.11 and 11.4.1.4";

        }

        leaf bitsps {
          type binary {
            length "0..1024";
          }
          description
            "Reports the bit allocation values on data symbols in the
normal operation interval (NOI).

This is reported via an array of 16-bit values where bits
15:4 represent the subcarrier index and bits 3:0 represent
the allocated bits using the values 0 and 2 to 6.

The 16-bit values are loaded into the binary array in
ascending order of the related sub-carrier-index (lowest
sub-carrier-index first; highest sub-carrier-index last).";
          reference
            "ITU-T G.997.2 clauses 7.10.12.3 and 7.10.12.4
            (BITSRMCdescriptor:bit-allocation-value).";

        }
      }  // container robust-management-channel

      leaf signal-attenuation {
        type union {
          type bbf-yang:undetermined;
          type uint16 {
            range "0..1001";
          }
        }
        units "0.1 dB";
        description
          "Reports the signal attention (SATN). A special value
(undetermined) indicates that the value is undetermined. A
second special value (0) indicates that the SATN is less than
or equal to 0 dB. A third special value (1001) indicates that
the SATN is greater than or equal to 100.1 dB. The data node
is updated only in L0 link state.";
        reference
          "ITU-T G.997.2 clauses 7.10.15.1 (SATNds) and 7.10.15.2
          (SATNus);
          ITU-T G.9701 clause 11.4.1.7";

      }

      container qln {
        description
          "State data nodes related to sub-carrier Quiet Line Noise
(QLN).";
        leaf qln-measurement-time {
          type uint16;
          units "symbols";
          description
            "Reports the number of symbols used to measure the
downstream QLN(f) values.";
          reference
            "ITU-T G.997.2 clauses 7.10.9.1 (QLNMTds) and 7.10.9.4
            (QLNMTus);
            ITU-T G.9701 clause 11.4.1.2.3";

        }

        leaf qln-sub-carrier-group-size {
          type sub-carrier-group-size;
          description
            "Reports the number of sub-carriers in any one sub-carrier
group used to represent the QLN(f) values.";
          reference
            "ITU-T G.997.2 clauses 7.10.9.2 (QLNds) and 7.10.9.5
            (QLNus);
            ITU-T G.9701 clause 11.4.1.2.3";

        }

        leaf qlnps {
          type per-sub-carrier-group-uint8 {
            length "0..512";
          }
          description
            "Reports the downstream QLN(f) as one value per sub-carrier
group.

For each octet, the values, 1 to 250 represent the Quiet
Line Noise (QLN) values of -35.5 to -160 dBm/Hz in steps of
-0.5 dBm/Hz using an offset of 70 where:

  QLN(f) = (qlnps + 70) * -0.5

A first special value (255) indicates that the QLN(f)
for this sub-carrier group is undetermined.

A second special value (254) indicates that no measurement
could be done for this sub carrier group because it is out
of the downstream MEDLEY set.

A third special value (0) indicates that the QLN(f) for
this sub-carrier group is greater than or equal to
-35dBm/Hz.

A fourth special value (251) indicates that the
QLN(f) for this sub-carrier group is less than or equal to
-160.5 dBm/Hz. The data node is updated only in L0 link
state.

The value is updated only in L0 link state. For upstream,
the value is also updated in the O-IDLE-TGVN state.";
          reference
            "ITU-T G.997.2 clauses 7.10.9.3 (QLNpsds) and 7.10.9.6
            (QLNpsus);
            ITU-T G.9701 clause 11.4.1.2.3";

        }
      }  // container qln

      container hlog {
        description
          "State data nodes related to sub-carrier Hlog.";
        leaf hlog-measurement-time {
          type uint16;
          units "symbols";
          description
            "Reports the number of symbols used to measure Hlog(f)
values.";
          reference
            "ITU-T G.997.2 clause 7.10.7.1 (HLOGMT); ITU-T
            G.9701 clause 11.4.1.2.1.";

        }

        leaf hlog-sub-carrier-group-size {
          type sub-carrier-group-size;
          description
            "Reports the number of sub-carriers in any one sub-carrier
group used to represent the Hlog(f) values.";
          reference
            "ITU-T G.997.2 clause 7.10.7.2 (HLOGG);
            ITU-T G.9701 clause 11.4.1.2.1";

        }

        leaf hlogps {
          type per-sub-carrier-group-uint16 {
            length "0..1024";
          }
          description
            "Reports the downstream Hlog(f) as one value per sub-carrier
group.

For each pair of octets, the values, 1 to 1019 represent
the Hlog values of 5.9 to -95.9 dB of -0.1 dB using an
offset of -60 where:

  Hlog(f) = (hlogps - 60) * -0.1

A first special value (1023) indicates that the Hlog(f) for
this sub-carrier group is undetermined.

A second special value (1022) indicates that no measurement
could be done for this sub carrier group because it is out
of the MEDLEY set.

A third special value (0) indicates that the Hlog(f) for
this sub-carrier group is greater than or equal to +6.0 dB.

A fourth special value (1020) indicates that the Hlog(f)
for this sub-carrier group is less than or equal to
-96.0 dB. The data node is updated only in L0 link state.";
          reference
            "ITU-T G.997.2 clause 7.10.7.3 (HLOGps);
            ITU-T G.9701 clause 11.4.1.2.1";

        }
      }  // container hlog
    }  // grouping line-status-parameters

    grouping line-ftu-update-test {
      description
        "Update test parameters associated with a Fast Transceiver
Unit.";
      leaf time-stamp-at-g1-update {
        type time-stamp-or-undefined;
        description
          "Reports the date/time when the test parameters group 1
that can change during showtime was last updated.";
        reference
          "ITU-T G.997.2 clause 7.10.13.1 (STAMP-TEST-NE-G1) and clause
          7.10.13.2 (STAMP-TEST-FE-G1); ITU-T G.9701 clause 11.1.";

      }

      leaf time-stamp-at-g2-update {
        type time-stamp-or-undefined;
        description
          "Reports the date/time when the test parameters group 2
that can change during showtime was last updated.";
        reference
          "ITU-T G.997.2 clauses 7.10.13.3 (STAMP-TEST-NE-G2) and
          7.10.13.4 (STAMP-TEST-FE-G2);
          ITU-T G.9701 clause 11.1";

      }

      leaf link-state-at-g1-update {
        type enumeration {
          enum "l0-link-state" {
            value 0;
            description "L0 link state.";
          }
          enum "l2.1n-link-state" {
            value 1;
            description "L2.1N link state.";
          }
          enum "l2.1b-link-state" {
            value 2;
            description "L2.1B link state.";
          }
          enum "l2.2-link-state" {
            value 3;
            description "L2.2 link state.";
          }
        }
        description
          "Report the link state during which test parameters in group 1
were updated.";
        reference
          "ITU-T G.997.2 clauses 7.14.2.2 (LINK-STATE-TEST-NE-G1) and
          7.14.2.3 (LINK-STATE-TEST-FE-G1);
          ITU-T G.9701 clause 12.1.1.7.3";

      }
    }  // grouping line-ftu-update-test

    grouping line-time-stamps {
      description
        "Time stamps associated with the upstream or downstream
direction.";
      leaf time-stamp-last-successful-bitswap {
        type time-stamp-or-undefined;
        description
          "Reports the date/time of the last successful Fast Transceiver
Unit (FTU) initiated Bit Swap execution that has modified the
bits allocation.";
        reference
          "ITU-T G.997.2 clause 7.10.14.1 (STAMP-BSW-ds) and 7.10.14.2
          (STAMP-BSW-us);
          ITU-T G.9701 clause 11.2.2.5";

      }

      leaf time-stamp-last-successful-autonomous-sra {
        type time-stamp-or-undefined;
        description
          "Reports the date/time of the last successful Fast Transceiver
Unit (FTU) initiated autonomous Seamless Rate Adaptation
(SRA) execution (excluding SRAs in response to Transmitter-
Initiated Gain Adjustment (TIGA)) that has modified the
bits allocation.";
        reference
          "ITU-T G.997.2 clauses 7.10.14.3 (STAMP-SRA-ds) and 7.10.14.4
          (STAMP-SRA-us);
          ITU-T G.9701 clause 11.2.2.5";

      }

      leaf time-stamp-last-successful-fra {
        type time-stamp-or-undefined;
        description
          "Reports the date/time of the last successful Fast Transceiver
Unit (FTU) initiated Fast Rate Adaptation (FRA) execution
that has modified the bits allocation.";
        reference
          "ITU-T G.997.2 clauses 7.10.14.5 (STAMP-FRA-ds) and 7.10.14.6
          (STAMP-FRA-us);
          ITU-T G.9701 clause 13.3.1.1";

      }

      leaf time-stamp-last-successful-rpa {
        type time-stamp-or-undefined;
        description
          "Reports the date/time of the last successful Fast Transceiver
Unit (FTU) initiated Robust Managmenet Channel (RMC)
Parameter Adjustmet (RPA) execution that has modified the
bits allocation for the RMC.";
        reference
          "ITU-T G.997.2 clause 7.10.14.7 (STAMP-RPA-ds) and 7.10.14.8
          (STAMP-RPA-us);
          ITU-T G.9701 clause 11.2.2.5";

      }

      leaf time-stamp-last-successful-rmcr {
        if-feature bbf-fast:rmcr;
        type time-stamp-or-undefined;
        description
          "Reports the date/time of the last successful Fast Transceiver
Unit (FTU) initiated Robust Managmenet Channel (RMC) recovery
(RMCR) execution that has modified RMC tone allocation.";
        reference
          "ITU-T G.997.2 clause 7.10.14.11 (STAMP-RMCRds) and 7.10.14.12
          (STAMP-RMCRus);
          ITU-T G.9701 clause 13.3.1.2";

      }
    }  // grouping line-time-stamps

    grouping line-ftu-failure-parameters {
      description
        "FAST Transceiver Unit (FTU) failure parameters applicable to
both upstream and downstream. The Loss of Signal (LOS), Loss of
RMC Channel (LOR), and Loss of Margin (LOM) failures are
mutually exclusive and reflect the reason cause of the
triggered re-initialization. If no LOS, LOR, or LOM failure is
declared, then the re-initialization is triggered by a
High_BER event (see clause 12.1.4/G.9701).";
      leaf loss-of-signal {
        type boolean;
        description
          "A Loss of Signal (LOS) failure is declared when a
re-initialization is triggered by a persistent near-end los
defect. A LOS failure is cleared immediately at the start of
showtime in the receiving direction.";
        reference
          "ITU-T G.997.2 clauses 7.4.1.1 (LOS) and 7.4.2.1 (LOS-FE)";

      }

      leaf loss-of-rmc {
        type boolean;
        description
          "A Loss of RMC Channel (LOR) failure is declared when a
re-initialization is triggered by a persistent near-end
lor defect. A LOR failure is cleared immediately at the start
of showtime in the receiving direction.";
        reference
          "ITU-T G.997.2 clauses 7.4.1.2 (LOR) and 7.4.2.2 (LOR-FE)";

      }

      leaf loss-of-margin {
        type boolean;
        description
          "A Loss of Margin (LOM) failure is declared when a
re-initialization is triggered by a persistent near-end lom
defect. A LOM failure is cleared immediately at the start of
showtime in the receiving direction.";
        reference
          "ITU-T G.997.2 clauses 7.4.1.3 (LOM) and 7.4.2.3 (LOM-FE)";

      }

      leaf loss-of-power {
        type boolean;
        description
          "A Loss of Power (LPR) failure is declared after 2.5 +/- 0.5
seconds of contiguous near-end lpr primitive presence. An LPR
failure is cleared after 10 +/- 0.5 seconds of no near-end
lpr primitive presence.";
        reference
          "ITU-T G.997.2 clauses 7.4.1.4 (LPR) and 7.4.2.3 (LPR-FE)";

      }
    }  // grouping line-ftu-failure-parameters

    grouping aln-parameters {
      description
        "Data nodes related to ALN(f) functionality.";
      container aln {
        description
          "State data nodes related to sub-carrier Active Line Noise
(ALN).";
        leaf aln-measurement-time {
          type uint16;
          units "symbols";
          description
            "Reports the number of symbols used to measure ALN(f)
values.";
          reference
            "ITU-T G.997.2 clause 7.10.10.1 (ALNMT);
            ITU-T G.9701 clause 11.4.1.2.4";

        }

        leaf aln-sub-carrier-group-size {
          type sub-carrier-group-size;
          description
            "Reports the number of sub-carriers in any one sub-carrier
group used to represent the ALN(f) values.";
          reference
            "ITU-T G.997.2 clause 7.10.10.2 (ALNG);
            ITU-T G.9701 clause 11.4.1.2.4";

        }

        leaf alnps {
          type per-sub-carrier-group-uint8 {
            length "0..512";
          }
          description
            "Reports the downstream ALN(f) as one value per sub-carrier
group.

For each octet, the values, 1 to 250 represent the Active
Line Noise (ALN) values of -35.5 to -160 dBm/Hz in steps of
-0.5 dBm/Hz using an offset of 70 where:

  ALN(f) = (alnps + 70) * -0.5

A first special value (255) indicates that the ALN(f)
for this sub-carrier group is undetermined.

A second special value (254) indicates that no measurement
could be done for this sub carrier group because it is out
of the downstream MEDLEY set.

A third special value (0) indicates that the ALN(f) for
this sub-carrier group is greater than or equal to
-35 dBm/Hz.

A fourth special value (251) indicates that the
ALN(f) for this sub-carrier group is less than or equal to
-160.5 dBm/Hz. The data node is updated only in L0 link
state.";
          reference
            "ITU-T G.997.2 clause 7.10.10.3 (ALNps);
            ITU-T G.9701 clause 11.4.1.2.4";

        }
      }  // container aln
    }  // grouping aln-parameters

    grouping xlog-parameters {
      description
        "Data nodes related to XLOG functionality.";
      container xlog {
        description
          "State data nodes related to sub-carrier XLOG.";
        container xlogdisturber {
          description
            "Provides information regarding the XLOG disturber to which
the XLOG values belong.";
          leaf vce-port-index {
            type union {
              type enumeration {
                enum "invalid" {
                  value 0;
                  description
                    "The XLOG disturber Vector Control Entity (VCE) port
index is invalid.";
                }
              }
              type vce-port-index;
            }
            description
              "The xlogps values are returned for the disturber line
with this vce-port-index in the same vectored group. A
special value (invalid) indicates an invalid
xlog-disturber-vce-port-index.";
            reference
              "ITU-T G.997.2 clause 7.13.2.6;
              ITU-T G.9701 clause 11.4.5.1.2";

          }
        }  // container xlogdisturber

        container xlogbands {
          description
            "Defines the set of sub-carriers for which XLOGpsds is
reported. For each band in which XLOGpsds is reported,
XLOGBANDSds contains a triplet of (start_subcarrier_index,
stop_subcarrier_index, group size). The XLOGpsds is
reported for all sub-carriers in the band (start and stop
subcarrier inclusive) with index equal to
start_subcarrier_index+m*group_size, with m integer. The
data node is updated only in L0 link state.";
          reference
            "ITU-T G.997.2 clause 7.10.17.1 (XLOGBANDSds);
            ITU-T G.9701 clause 11.4.1.2.8";

          list xlog {
            key "band-index";
            max-elements 8;
            description
              "List of XLOG band edges.";
            leaf band-index {
              type uint8 {
                range "1..8";
              }
              description "Band index.";
            }

            uses sub-carrier-range {
              refine 
            }

            leaf group-size {
              type uint8 {
                range
                  "1 | 2 | 4 | 8 | 16 | 32 | 64";
              }
              description
                "The sub-carrier group size.";
            }
          }  // list xlog
        }  // container xlogbands

        leaf xlogps {
          type per-sub-carrier-group-uint8 {
            length "0..512";
          }
          description
            "Reports the downstream Xlog(f) as one value per sub-carrier
group.

For each octet, the values, 1 to 250 represent the Xlog
values of +39.5 to -85 dB in steps of -0.5 dB
using an offset of 80 where:

  Xlog(f) = (xlogps - 80) * -0.5

A first special value (255) indicates that the Xlog(f) for
this sub-carrier group is undetermined.

A second special value (254) indicates that no measurement
could be done for this sub-carrier group.

A third special value (0) indicates that the Xlog(f) for
this sub-carrier group is greater than or equal to +40.0
dB.

A fourth special value (251) indicates that the Xlog(f) for
this sub-carrier group is less than or equal to -85.5 dB.
The data node is updated only in L0 link state.";
          reference
            "ITU-T G.997.2 clause 7.10.17.2 (XLOGpsds);
            ITU-T G.9701 clause 11.4.1.2.8";

        }
      }  // container xlog
    }  // grouping xlog-parameters

    grouping line-status {
      description
        "Defines the parameters that define the operational status of
a FAST line.";
      leaf profile {
        type profiles;
        description
          "Reports for each profile whether operation according to
that profile is enabled or disabled. Only one profile can be
enabled.";
        reference
          "ITU-T G.997.2 clause 7.10.1.1 (PROFILE);
          ITU-T G.9701 clause 6";

      }

      leaf link-state {
        type enumeration {
          enum "l0-link-state" {
            value 0;
            description "L0 link state.";
          }
          enum "l2.1n-link-state" {
            value 1;
            description "L2.1N link state.";
          }
          enum "l2.1b-link-state" {
            value 2;
            description "L2.1B link state.";
          }
          enum "l2.2-link-state" {
            value 3;
            description "L2.2 link state.";
          }
          enum "l3-link-state" {
            value 4;
            description "L3 link state.";
          }
        }
        description
          "Reports the actual link state.";
        reference
          "ITU-T G.997.2 clause 7.14.2.1 (LINK_STATE);
          ITU-T G.9701 clause 12.1.1.6";

      }

      leaf initialization-success-failure-cause {
        type enumeration {
          enum "successful" {
            value 0;
            description "Successful.";
          }
          enum "config-error" {
            value 1;
            description
              "Configuration error. This error occurs if the line
cannot reach the L0 state due to a mismatch of
configuration and FAST Transceiver Unit (FTU)
capabilities.";
          }
          enum "config-not-feasible" {
            value 2;
            description
              "Configuration not feasible on the line. This error
occurs if the line cannot reach the L0 state due to a
mismatch of configuration and line and noise
characteristics.";
          }
          enum "communication-problem" {
            value 3;
            description
              "Communication problem. This error occurs, for example,
due to corrupted messages or bad syntax messages or if
no common mode can be selected in the ITU-T G.994.1
handshaking procedure or due to a timeout.";
          }
          enum "no-far-end-ftu-detected" {
            value 4;
            description
              "No far-end FAST Transceiver Unit (FTU) detected. This
error occurs if the far-end FTU is not powered or not
connected or if the line is too long to allow detection
of a far-end FTU.";
          }
          enum "unknown" {
            value 5;
            description
              "Any other or unknown initialization failure cause.";
          }
        }
        description
          "Reports whether the last full or short initialization
procedure was successful. If the last initialization
procedure was not successful, this parameter provides
the reason.";
        reference
          "ITU-T G.997.2 clause 7.10.2.1 (INITFSCAUSE);
          ITU-T G.9701 clause 12.3.1";

      }

      leaf annex-x-enabled {
        if-feature bbf-fast:annex-x;
        type boolean;
        description
          "Indicates whether Annex X operation is enabled.";
        reference
          "ITU-T G.997.2 clause T.3.1 (ANNEX_X_ENABLED),
          ITU-T G.9701 clause X.6.8.1";

      }

      leaf annex-d-enabled {
        if-feature bbf-fast:annex-d;
        type boolean;
        description
          "Indicates whether Annex D operation is enabled.";
        reference
          "ITU-T G.997.2 clause T.3.3 (ANNEX_D_ENABLED);
          ITU-T G.9701 clause D.5.8.1";

      }

      leaf idta-enabled {
        if-feature (bbf-fast:dta and bbf-fast:annex-x);
        type boolean;
        description
          "Indicates whether independent Dynamic Time Assignment (iDTA)
is enabled.";
        reference
          "ITU-T G.9701 clause T.3.2 (DTA_ENABLED);
          ITU-T G.9701 clause X.6.8.2";

      }

      leaf cdta-procedure-actual-type {
        if-feature (bbf-fast:dta and bbf-fast:annex-d);
        type enumeration {
          enum "disabled" {
            value 0;
            description
              "Coordinated Dynamic Time Assignment (cDTA) is disabled.";
          }
          enum "one-step" {
            value 1;
            description
              "Dynamic Resource Allocation (DRA) uses one-step
Coordinated Dynamic Time Assignment (cDTA)
procedure.";
          }
          enum "two-step" {
            value 2;
            description
              "Dynamic Resource Allocation (DRA) uses two-step
Coordinated Dynamic Time Assignment (cDTA) procedure.";
          }
        }
        description
          "Indicates which Coordinated Dynamic Time Assignment (cDTA)
procedure is used by the Dynamic Resource Allocation (DRA)
according to Annex D.";
        reference
          "ITU-T G.997.2 clause T.3.4 (CDTA_PROC_ACT);
          ITU-T G.9701 clause D.5.8.2";

      }

      container ftu-o {
        description
          "Line status parameters associated with the Fast
Transceiver Unit - central Office (FTU-O) (Near End).";
        container update-test {
          description
            "Test update parameters.";
          uses line-ftu-update-test;
        }  // container update-test

        container failures {
          description
            "Failure related status.";
          leaf line-initialization-failure {
            type boolean;
            description
              "When the transmitter enters the SILENT state and fails to
reach the SHOWTIME state (after a vendor discretionary
number of retries and/or within a vendor discretionary
timeout), then an initialization failure occurs. An
initialization failure cause and last successful
transmitted state are reported.";
            reference
              "ITU-T G.997.2 clauses 7.4.3 (LINIT) and 7.10.2";

          }

          uses line-ftu-failure-parameters;
        }  // container failures
      }  // container ftu-o

      container ftu-r {
        description
          "Line status parameters associated with the Fast
Transceiver Unit - Remote side (FTU-R) (Far End).";
        container update-test {
          description
            "Test update parameters.";
          uses line-ftu-update-test;
        }  // container update-test

        container failures {
          description
            "Failure related status.";
          uses line-ftu-failure-parameters;
        }  // container failures

        leaf minimum-mds-supported {
          type uint8 {
            range "0 | 5..10";
          }
          description
            "If Annex D is enabled (see clause T.3.3), it reports the
minimal Mds for use in cDTA supported by the FTU-R.
Otherwise, a special value (0) is reported.";
          reference
            "ITU-T G.997.2 clause T.3.5";

        }
      }  // container ftu-r

      container downstream {
        description
          "Line status parameters associated with the downstream
direction.";
        leaf initialization-last-transmitted-signal {
          type uint8 {
            range "0..21";
          }
          description
            "Reports the downstream signal count of the last transmitted
initialization signal in the last full or short
initialization performed on the line.";
          reference
            "ITU-T G.997.2 clause 7.10.2.2 (INITLASTSIGNALds);
            ITU-T G.9701 clause 12.3.1";

        }

        leaf actual-minimum-mds {
          if-feature bbf-fast:dta;
          type uint8 {
            range "5..31";
          }
          description
            "Reports the actual minimum number of downstream symbol
positions Mds (Act_min_M ds) needed to provide an expected
downstream throughput of at least DTA_MINETRds.";
          reference
            "ITU-T G.997.2 clause T.5.3.1 (DTA_ACTMINMds);
            ITU-T G.9701 clause T.2.10";

        }

        leaf actual-maximum-mds {
          if-feature bbf-fast:dta;
          type uint8 {
            range "5..31";
          }
          description
            "Reports the actual maximum number of downstream symbol
positions Mds (Act_max_M ds) needed to provide an expected
upstream throughput of at least DTA_MINETRus.";
          reference
            "ITU-T G.997.2 clause T.5.3.2 (DTA_ACTMAXMds);
            ITU-T G.9701 clause T.2.10";

        }

        uses line-status-parameters;

        uses aln-parameters;

        uses xlog-parameters;

        container time-stamps {
          description
            "Time stamps of certain status parameters.";
          uses line-time-stamps;

          leaf time-stamp-last-successful-tiga {
            type time-stamp-or-undefined;
            description
              "Reports the date/time of the last successful FAST
Transceiver Unit - central Office (FTU-O) initiated
Transmitter-Initiated Gain Adjustment (TIGA)
execution.";
            reference
              "ITU-T G.997.2 clause 7.10.14.9 (STAMP-TIGA);
              ITU-T G.9701 clause 11.2.2.5";

          }

          leaf time-stamp-last-successful-srec {
            if-feature bbf-fast:srec;
            type time-stamp-or-undefined;
            description
              "Reports the date/time of the last successful FAST
Transceiver Unit - central Office (FTU-O) initiated
(local or remote) Showtime Reconfiguration (SREC)
execution.";
            reference
              "ITU-T G.997.2 clause 7.10.14.10 (STAMP-SREC);
              ITU-T G.9701 Annex R";

          }
        }  // container time-stamps
      }  // container downstream

      container upstream {
        description
          "Line status parameters associated with the downstream
direction.";
        leaf initialization-last-received-signal {
          type uint8 {
            range "0..10";
          }
          description
            "Reports the upstream signal count of the last transmitted
initialization signal in the last full or short
initialization performed on the line.";
          reference
            "ITU-T G.997.2 clause 7.10.2.3 (INITLASTSIGNALus);
            ITU-T G.9701 clause 12.3.1";

        }

        uses line-status-parameters;

        container time-stamps {
          description
            "Time stamps of certain status parameters.";
          uses line-time-stamps;
        }  // container time-stamps
      }  // container upstream
    }  // grouping line-status
  }  // submodule bbf-fast-line-status-body