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:   Sowrirajan Padmanabhan, Nokia

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) 2016-2020 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-355a3; see
the TR itself for full legal notices.";

    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;
        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;
        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 Forward error correction
          second - Line (FECS-L)";

      }

      leaf errored-seconds-l {
        type bbf-yang:performance-counter32;
        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 Errored second - Line
          (ES-L)";

      }

      leaf severely-errored-seconds-l {
        type bbf-yang:performance-counter32;
        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 Severely errored second -
          Line (SES-L)";

      }

      leaf loss-of-signal-seconds-l {
        type bbf-yang:performance-counter32;
        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 LOS second - Line
          (LOSS-L)";

      }

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

      }

      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 - see
ITU-T G.997.1 clause 7.2.7.13.

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 7.2.1.4.1 INM INPEQ histogram 1..17
          (INMINPEQ1..17-L)";

        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 - see
ITU-T G.997.1 clause 7.2.7.13.

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 INM total measurement
          (INMME-L)";

      }

      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 - see
ITU-T G.997.1 clause 7.2.7.13.

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 INM IAT histogram 0..7
          (INMIAT0..7-L)";

        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. Parameter procedures will be as
defined in ITU-T G.997.1 clause 7.2.7. Successful SOS is
defined in clause 12.1.4 of [ITU-T G.993.2].

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 clause 7.2.1.6.1 Near-end successful SOS
          count (SOS-SUCCESS-NE)";

      }

      leaf leftr-defects-seconds-counter-ne {
        type bbf-yang:performance-counter32;
        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 (see clause 11.4.1
of [ITU-T G.998.4] for the definition of this counter).
This near-end counter is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.6 leftr defects seconds
          counter";

      }

      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 (see
clause 11.4.2 of [ITU-T G.998.4] for the definition of
this counter).
This near-end counter is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.7 Error-free bits counter";

      }

      leaf minimum-error-free-throughput-ne {
        type bbf-yang:performance-counter32;
        units "bit/s";
        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-min or 24-hour accumulation period
(see clause 11.4.3 of [ITU-T G.998.4] for the definition
of this parameter). The value is reported in bit/s.
This near-end value is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.8 Minimum error-free
          throughput (MINEFTR)";

      }

      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. Parameter
procedures are defined in ITU-T G997.1 clause 7.2.7.";
        reference
          "ITU-T G.997.1 clause 7.2.1.3.1 Full initialization
          count";

      }

      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. Parameter procedures are
defined in ITU-T G997.1 clause 7.2.7.";
        reference
          "ITU-T G.997.1 clause 7.2.1.3.2 Failed full
          initialization count";

      }

      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.
Parameter procedures are defined in ITU-T G997.1 clause
7.2.7.

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 clause 7.2.1.3.3 Short initialization
          count";

      }

      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. Parameter procedures are defined in ITU-T G997.1
clause 7.2.7.

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 clause 7.2.1.3.4 Failed short
          initialization count";

      }

      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.
Those anomalies are defined in clause 11.3.1.1 of [ITU-T
G.993.2]. 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 Loss of Power
          interruption count (LPR_INTRPT)";

      }

      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.
Those anomalies are defined in clause 11.3.1.1 of [ITU-T
G.993.2]. 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 Host-Reinit interruption
          count (HRI_INTRPT)";

      }

      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.
Those defects are defined in clause 11.3.1.1 of [ITU-T
G.993.2]. 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 Spontaneous interruption
          count (SPONT_INTRPT)";

      }

      leaf loss-of-signal {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the Loss of Signal (LOS) failures.";
        reference
          "Borrowed from ITU-T G.997.2 clause 7.7.4 (LOS).
          Count of failures defined in 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
          "Count of failures defined in 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
          "Borrowed from ITU-T G.997.2 clause 7.7.7 (LPR).
          Count of failures defined in ITU-T G.997.1
          clause 7.1.1.1.3.";

      }

      leaf maximum-error-free-throughput-ne {
        if-feature maxeftr;
        type bbf-yang:performance-counter32;
        units "bit/s";
        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-min or 24-hour accumulation period
(see clause 11.4.4 of [ITU-T G.998.4] for the definition
of this parameter). The value is reported in bit/s.
This near-end value is only defined for upstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.1.9 Maximum error-free
          throughput (MAXEFTR)";

      }

      leaf sra-success-ne {
        if-feature 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. Parameter procedures
will be as defined in ITU-T G.997.1 clause 7.2.9. Successful
SRA is defined in clause 11.3.1.6 of [ITU-T G.993.2].";
        reference
          "ITU-T G.997.1 clause 7.2.9 Near-end successful SRA
          count (SRA-SUCCESS-NE)";

      }
    }  // 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;
        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;
        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 Forward error correction
          second - Line far-end (FECS-LFE)";

      }

      leaf errored-seconds-lfe {
        type bbf-yang:performance-counter32;
        description
          "This parameter is a count of one-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 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 Errored second - Line
          far-end (ES-LFE)";

      }

      leaf severely-errored-seconds-lfe {
        type bbf-yang:performance-counter32;
        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 Severely errored second -
          Line far-end (SES-LFE)";

      }

      leaf loss-of-signal-seconds-lfe {
        type bbf-yang:performance-counter32;
        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 LOS second - Line far-end
          (LOSS-LFE)";

      }

      leaf unavailable-seconds-lfe {
        type bbf-yang:performance-counter32;
        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 -
see ITU-T G.997.1 clause 7.2.7.13.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.5 Unavailable seconds -
          Line far-end (UAS-LFE)";

      }

      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 - see
ITU-T G.997.1 clause 7.2.7.13.";
        reference
          "ITU-T G.997.1 clause 7.2.1.5.1 INM INPEQ histogram 1..17
          (INMINPEQ1..17-LFE)";

        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. This parameter is subject to inhibiting - see
ITU-T G.997.1 clause 7.2.7.13.

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 7.2.1.5.2 INM total measurement
          (INMME-LFE)";

      }

      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 - see
ITU-T G.997.1 clause 7.2.7.13.";
        reference
          "ITU-T G.997.1 clause 7.2.1.5.3 INM IAT histogram 0..7
          (INMIAT0..7-LFE)";

        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. Parameter procedures will be as
defined in ITU-T G.997.1 clause 7.2.7. Successful SOS is
defined in clause 12.1.4 of [ITU-T G.993.2].

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 clause 7.2.1.7.1 Far-end successful SOS
          count (SOS-SUCCESS-FE)";

      }

      leaf leftr-defects-seconds-counter-lfe {
        type bbf-yang:performance-counter32;
        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 (see clause 11.4.1 of
[ITU-T G.998.4] for the definition of this counter).
The far-end counter is only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.6 leftr defects seconds
          counter";

      }

      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 (see
clause 11.4.2 of [ITU-T G.998.4] for the definition of
this counter).
This far-end counter is only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.7 Error-free bits counter";

      }

      leaf minimum-error-free-throughput-lfe {
        type bbf-yang:performance-counter32;
        units "bit/s";
        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-min or 24-hour accumulation period
(see clause 11.4.3 of [ITU-T G.998.4] for the definition
of this parameter). The value is reported in bit/s.
This far-end value is only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.8 Minimum error-free
          throughput (MINEFTR)";

      }

      leaf loss-of-signal-fe {
        type bbf-yang:performance-counter32;
        description
          "Reports a count of the far-end Loss of Signal (LOS)
failures.";
        reference
          "Borrowed from ITU-T G.997.2 clause 7.7.4 (LOS).
          Count of failures defined in 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
          "Count of failures defined in 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
          "Borrowed from ITU-T G.997.2 clause 7.7.7 (LPR).
          Count of failures defined in ITU-T G.997.1
          clause 7.1.1.2.3.";

      }

      leaf maximum-error-free-throughput-lfe {
        if-feature maxeftr;
        type bbf-yang:performance-counter32;
        units "bit/s";
        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-min or 24-hour accumulation period
(see clause 11.4.4 of [ITU-T G.998.4] for the definition
of this parameter). The value is reported in bit/s.
This far-end value is only defined for downstream.";
        reference
          "ITU-T G.997.1 clause 7.2.1.2.9 Maximum error-free
          throughput (MAXEFTR)";

      }

      leaf sra-success-fe {
        if-feature 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. Parameter procedures
will be as defined in ITU-T G.997.1 clause 7.2.9. Successful
SRA is defined in clause 11.3.1.7 of [ITU-T G.993.2].";
        reference
          "ITU-T G.997.1 clause 7.2.9 Far-end successful SRA
          count (SRA-SUCCESS-FE)";

      }
    }  // 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