submodule bbf-vdsl-xtu-line-performance-body {

    yang-version 1.1;

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

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

    include bbf-vdsl-base;
    include bbf-vdsl-base-body;

    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 YANG definitions for
managing Broadband Forum TR-252i3 clause 7.1 xDSL Transceiver
Unit (xTU) Line Performance.

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 "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 "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>";

    }


    grouping xtu-c-line-performance {
      description
        "Line performance data for a given xDSL Transceiver Unit -
Central office (xTU-C).";
      leaf measured-time {
        type uint32;
        units "seconds";
        description
          "Reports the amount of time, measured in seconds, that
statistics for this interval have been counted.";
        reference
          "ITU-T G.997.2 clause 7.7.1 and 7.8.1";

      }

      leaf invalid-data-flag {
        type boolean;
        description
          "Reports the validity of the corresponding performance
monitoring data. true = invalid.";
        reference
          "ITU-T G.997.2 clause 7.7.2 and 7.8.2";

      }

      leaf forward-error-correction-seconds-l {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals with one
or more Forward Error Correction (FEC) anomalies summed over
all received bearer channels.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.1 (FECS-L)";

      }

      leaf errored-seconds-l {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals with one
or more Cyclic Redundancy Check (CRC-8) anomalies summed over
all received bearer channels, or one or more Loss of Signal
(LOS) defects, or one or more Severely Errored Frame (SEF)
defects, or one or more Loss of Power (LPR) defects.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.2 (ES-L)";

      }

      leaf severely-errored-seconds-l {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of severely errored seconds (SES).
An SES is declared if, during a 1 second interval, there are
18 or more Cyclic Redundancy Check (CRC-8) anomalies in one
or more of the received bearer channels, or one or more Loss
of Signal (LOS) defects, or one or more Severely Errored
Frame (SEF) defects, or one or more Loss of Power (LPR)
defects. If ITU-T G.998.4 is supported and retransmission
is enabled in the near-end received direction, a SES is also
declared if, during a 1 second interval, there is one or more
Severe Loss of Error-Free Throughput (SEFTR) defect in the
near-end received direction.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.3 (SES-L)";

      }

      leaf loss-of-signal-seconds-l {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals containing
one or more Loss of Signal (LOS) defects.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.4 (LOSS-L)";

      }

      leaf unavailable-seconds-l {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals for which the
xDSL line is unavailable. Some parameter counts are inhibited
during unavailability.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.1.5 (UAS-L) and 7.2.7.13";

      }

      list inminpeq-l {
        key "inminpeq-index";
        description
          "This parameter is a count of the near-end INMAINPEQi
anomalies occurring on the line during the accumulation
period. This parameter is subject to inhibiting.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature
'impulse-noise-monitoring' is not supported.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.4.1 (INMINPEQ1..17-L) and
          7.2.7.13";

        leaf inminpeq-index {
          type uint8 {
            range "1..17";
          }
          description
            "Identifies the INMAINPEQ histogram bin.";
        }

        leaf inminpeq-l {
          type bbf-yang:performance-counter32-or-inactive;
          description
            "Count of the near-end INMAINPEQ anomalies.";
        }
      }  // list inminpeq-l

      leaf inmme-l {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the near-end INMAME anomalies
occurring on the line during the accumulation period. This
parameter is subject to inhibiting.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature
'impulse-noise-monitoring' is not supported.";
        reference
          "ITU-T G.997.1 clause 7.2.1.4.2 (INMME-L) and 7.2.7.13";

      }

      list inmiat-l {
        key "inminiat-index";
        description
          "This parameter is a count of the near-end INMAIATi anomalies
occurring on the line during the accumulation period. This
parameter is subject to inhibiting.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature
'impulse-noise-monitoring' is not supported.";
        reference
          "ITU-T G.997.1 clause 7.2.1.4.3 (INMIAT0..7-L) and 7.2.7.13";

        leaf inminiat-index {
          type uint8 {
            range "0..7";
          }
          description
            "Identifies the INMAIAT histogram bin.";
        }

        leaf inmiat-l {
          type bbf-yang:performance-counter32-or-inactive;
          description
            "Count of the near-end INMAIAT anomalies.";
        }
      }  // list inmiat-l

      leaf sos-success-ne {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the total number of successful
Save our Showtime (SOS) procedures initiated by the near-end
xDSL Transceiver Unit (xTU) on the line during the
accumulation period.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature 'sos'
is not supported.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.6.1 (SOS-SUCCESS-NE) and 7.2.7;
          ITU-T G.993.2 clause 12.1.4";

      }

      leaf leftr-defects-seconds-counter-ne {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "Near-end line Low Error-Free Throughput (LEFTR) defects
seconds counter. If retransmission is used in a given
transmit direction, this parameter is a count of the seconds
with a near-end 'leftr' defect present. This near-end counter
is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.6;
          ITU-T G.998.4 clause 11.4.1";

      }

      leaf error-free-bits-counter-ne {
        type bbf-yang:performance-counter32;
        description
          "Near-end line error-free bits counter. If retransmission
is used in a given transmit direction, this parameter is
a count of the number of error-free bits passed over the
Beta1 reference point, divided by 65536 = 2^16.
This near-end counter is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.7;
          ITU-T G.998.4 clause 11.4.2";

      }

      leaf minimum-error-free-throughput-ne {
        type bbf-yang:performance-counter32;
        units "bits per second";
        description
          "Near-end Minimum Error-Free Throughput (MINEFTR). If
retransmission is used in a given transmit direction, this
parameter MINEFTR reports the minimum of the EFTR observed
over the 15 minute or 24 hour accumulation period. The value
is reported in bits per second.
This near-end value is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.8 (MINEFTR);
          ITU-T G.998.4 clause 11.4.3";

      }

      leaf full-initializations {
        type bbf-yang:performance-counter32;
        description
          "This parameter is a count of the total number of full
initializations attempted on the line (successful and failed)
during the accumulation period.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.3.1 and 7.2.7";

      }

      leaf failed-full-initializations {
        type bbf-yang:performance-counter32;
        description
          "This performance parameter is a count of the total number of
failed full initializations during the accumulation period. A
failed full initialization is when showtime is not reached at
the end of the full initialization procedure.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.3.2 and 7.2.7";

      }

      leaf short-initializations {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the total number of fast
retrains or short initializations attempted on the line
(successful and failed) during the accumulation period.

A special value (enum inactive) indicates that this counter
is not active on the line as this is only applicable when
running in an ADSL mode of operation.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.3.3 and 7.2.7";

      }

      leaf failed-short-initializations {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This performance parameter is a count of the total number of
failed fast retrains or short initializations during the
accumulation period. A failed fast retrain or short
initialization is when showtime is not reached at the end of
the fast retrain or short initialization procedure, e.g.,
when: A Cyclic Redundancy Check (CRC) error is detected, a
time-out occurs, or a fast retrain profile is unknown.

A special value (enum inactive) indicates that this counter
is not active on the line as this is only applicable when
running in an ADSL mode of operation.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.3.4 and 7.2.7";

      }

      leaf loss-of-power-intrpt {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the number of lpr_intrpt
anomalies occurring during the accumulation period. A special
value (enum inactive) indicates that this counter is not
active on the line. Threshold reports for this counter are
not specified.";
        reference
          "ITU-T G.997.1 clause 7.2.1.8.1 (LPR_INTRPT);
          ITU-T G.993.2 clause 11.3.1.1";

      }

      leaf host-reinit-interruptions {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the number of hri_intrpt
anomalies occurring during the accumulation period. A special
value (enum inactive) indicates that this counter is not
active on the line. Threshold reports for this counter are
not specified.";
        reference
          "ITU-T G.997.1 clause 7.2.1.8.2 (HRI_INTRPT);
          ITU-T G.993.2 clause 11.3.1.1";

      }

      leaf spontaneous-intrpt {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the number of spont_intrpt
anomalies occurring during the accumulation period. A special
value (enum inactive) indicates that this counter is not
active on the line. Threshold reports are specified for the
24-hour interval counter only.";
        reference
          "ITU-T G.997.1 clause 7.2.1.8.3 (SPONT_INTRPT);
          ITU-T G.993.2 clause 11.3.1.1";

      }

      leaf loss-of-signal {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Signal (LOS) failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.1.1";

      }

      leaf loss-of-frame {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Frame (LOF) failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.1.2";

      }

      leaf loss-of-power {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Power (LPR) failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.1.3";

      }

      leaf maximum-error-free-throughput-ne {
        if-feature bbf-vdsl:maxeftr;
        type bbf-yang:performance-counter32;
        units "bits per second";
        description
          "Near-end Maximum Error-Free Throughput (MAXEFTR). If
retransmission is used in a given transmit direction, this
parameter MAXEFTR reports the maximum of the EFTR observed
over the 15 minute or 24 hour accumulation period. The value
is reported in bits per second. This near-end value is only
defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.9 (MAXEFTR);
          ITU-T G.998.4 clause 11.4.4";

      }

      leaf sra-success-ne {
        if-feature bbf-vdsl:successful-sra;
        type bbf-yang:performance-counter32;
        description
          "This parameter is a count of the total number of successful
Seamless Rate Adaptation (SRA) procedures initiated by the
near-end xDSL Transceiver Unit (xTU) on the line during the
accumulation period.";
        reference
          "ITU-T G.997.1 clause 7.2.9 (SRA-SUCCESS-NE);
          ITU-T G.993.2 clause 11.3.1.6";

      }
    }  // grouping xtu-c-line-performance

    grouping xtu-r-line-performance {
      description
        "Line performance data for a given xDSL Transceiver Unit -
Remote side (xTU-R).";
      leaf measured-time {
        type uint32;
        units "seconds";
        description
          "Reports the amount of time, measured in seconds, that
statistics for this interval have been counted.";
        reference
          "ITU-T G.997.2 clause 7.7.1 and 7.8.1";

      }

      leaf invalid-data-flag {
        type boolean;
        description
          "Reports the validity of the corresponding performance
monitoring data. true = invalid.";
        reference
          "ITU-T G.997.2 clause 7.7.2 and 7.8.2";

      }

      leaf forward-error-correction-seconds-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals with one or
more Far-End Forward Error Correction  (FFEC) anomalies
summed over all transmitted bearer channels.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.1 (FECS-LFE)";

      }

      leaf errored-seconds-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals with one or
more Far-End Block Error (FEBE) anomalies summed over all
transmitted bearer channels, or one or more Far-End Loss of
of Signal (LOS-FE) defects, or one or more Remote Defect
Indication (RDI) defects, or one or more Far-End Loss of
Power (LPR-FE) defects.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.2 (ES-LFE)";

      }

      leaf severely-errored-seconds-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of severely errored seconds (SES).
An SES is declared if, during a 1 second interval, there are
18 or more Far-End Block Error (FEBE) anomalies in one or
more of the transmitted bearer channels, or one or more
Far-End Loss of Signal (LOS-FE) defects, or one or more
Remote Defect Indication (RDI) defects, or one or more
Far-End Loss of Power (LPR-FE) defects. If [ITU-T G.998.4] is
supported and retransmission is enabled in the far-end
received direction, a SES-LFE is also declared if, during a
1 second interval, there is one or more severe loss of
error-free throughput (seftr) defect in the far-end received
direction.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.3 (SES-LFE)";

      }

      leaf loss-of-signal-seconds-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals containing
one or more far-end Loss of Signal (LOS) defects.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.4 (LOSS-LFE)";

      }

      leaf unavailable-seconds-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "This parameter is a count of 1 second intervals for which the
far-end xDSL line is unavailable. Some parameter counts are
inhibited during unavailability.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.2.5 (UAS-LFE) and 7.2.7.13";

      }

      list inminpeq-lfe {
        key "inminpeq-index";
        description
          "This parameter is a count of the far-end INMAINPEQi
anomalies occurring on the line during the accumulation
period. This parameter is subject to inhibiting.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.5.1 (INMINPEQ1..17-LFE) and
          7.2.7.13";

        leaf inminpeq-index {
          type uint8 {
            range "1..17";
          }
          description
            "Identifies the INMAINPEQ histogram bin.";
        }

        leaf inminpeq-lfe {
          type bbf-yang:performance-counter32-or-inactive;
          description
            "Count of the far-end INMAINPEQ anomalies.

A special value (enum inactive) indicates that this
counter is not active on the line. This occurs when the
feature 'impulse-noise-monitoring' is not supported.";
        }
      }  // list inminpeq-lfe

      leaf inmme-lfe {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the far-end INMAME anomalies
occurring on the line during the accumulation period.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature
'impulse-noise-monitoring' is not supported.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.5.2 (INMME-LFE) and 7.2.7.13";

      }

      list inmiat-lfe {
        key "inminiat-index";
        description
          "This parameter is a count of the far-end INMAIATi anomalies
occurring on the line during the accumulation period. This
parameter is subject to inhibiting.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.5.3 (INMIAT0..7-LFE) and
          7.2.7.13";

        leaf inminiat-index {
          type uint8 {
            range "0..7";
          }
          description
            "Identifies the INMAIAT histogram bin.";
        }

        leaf inmiat-lfe {
          type bbf-yang:performance-counter32-or-inactive;
          description
            "Count of the far-end INMAIAT anomalies.

A special value (enum inactive) indicates that this
counter is not active on the line. This occurs when the
feature 'impulse-noise-monitoring' is not supported.";
        }
      }  // list inmiat-lfe

      leaf sos-success-fe {
        type bbf-yang:performance-counter32-or-inactive;
        description
          "This parameter is a count of the total number of successful
Save our Showtime (SOS) procedures initiated by the far-end
xDSL Transceiver Unit (xTU) on the line during the
accumulation period.

A special value (enum inactive) indicates that this counter
is not active on the line. This occurs when the feature 'sos'
is not supported.";
        reference
          "ITU-T G.997.1 clauses 7.2.1.7.1 (SOS-SUCCESS-FE) and 7.2.7;
          ITU-T G.993.2 clause 12.1.4";

      }

      leaf leftr-defects-seconds-counter-lfe {
        type bbf-yang:performance-counter32;
        units "seconds";
        description
          "Far-end line Low Error-Free Throughput (LEFTR) defects
seconds counter. If retransmission is used in a given
transmit direction, this parameter is a count of the seconds
with a far-end leftr defect present. The far-end counter is
only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.6;
          ITU-T G.998.4 clause 11.4.1";

      }

      leaf error-free-bits-counter-lfe {
        type bbf-yang:performance-counter32;
        description
          "Far-end line error-free bits counter. If retransmission
is used in a given transmit direction, this parameter is
a count of the number of error-free bits passed over the
Beta1 reference point, divided by 65536 = 2^16. This far-end
counter is only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.7;
          ITU-T G.998.4 clause 11.4.2";

      }

      leaf minimum-error-free-throughput-lfe {
        type bbf-yang:performance-counter32;
        units "bits per second";
        description
          "Far-end minimum error-free throughput (MINEFTR). If
retransmission is used in a given transmit direction, this
parameter MINEFTR reports the minimum of the EFTR observed
over the 15 minute or 24 hour accumulation period. The value
is reported in bits per second. This far-end value is only
defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.8 (MINEFTR);
          ITU-T G.998.4 clause 11.4.3";

      }

      leaf loss-of-signal-fe {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the far-end Loss of Signal (LOS)
failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.2.1";

      }

      leaf loss-of-frame-fe {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Frame (LOF) failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.2.2";

      }

      leaf loss-of-power-fe {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Power (LPR) failures.";
        reference
          "ITU-T G.997.1 clause 7.1.1.2.3";

      }

      leaf maximum-error-free-throughput-lfe {
        if-feature bbf-vdsl:maxeftr;
        type bbf-yang:performance-counter32;
        units "bits per second";
        description
          "Far-end maximum error-free throughput (MAXEFTR). If
retransmission is used in a given transmit direction, this
parameter MAXEFTR reports the maximum of the EFTR observed
over the 15 minute or 24 hour accumulation period. The value
is reported in bits per second. This far-end value is only
defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.9 (MAXEFTR);
          ITU-T G.998.4 clause 11.4.4";

      }

      leaf sra-success-fe {
        if-feature bbf-vdsl:successful-sra;
        type bbf-yang:performance-counter32;
        description
          "This parameter is a count of the total number of successful
Seamless Rate Adaptation (SRA) procedures initiated by the
far-end xDSL Transceiver Unit (xTU) on the line during the
accumulation period.";
        reference
          "ITU-T G.997.1 clause 7.2.9 (SRA-SUCCESS-FE);
          ITU-T G.993.2 clause 11.3.1.7";

      }
    }  // grouping xtu-r-line-performance

    grouping line-time-stamp {
      description
        "Time stamp for line performance parameters.";
      leaf time-stamp {
        type yang:date-and-time;
        description
          "Reports the start date/time for this interval.";
        reference
          "ITU-T G.997.2 clause 7.7.3";

      }
    }  // grouping line-time-stamp
  }  // submodule bbf-vdsl-xtu-line-performance-body