submodule bbf-xpon-channel-termination-body {

    yang-version 1.1;

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

    import ietf-interfaces {
      prefix if;
    }
    import ietf-yang-types {
      prefix yang;
    }
    import bbf-xpon-types {
      prefix bbf-xpon-types;
    }
    import bbf-xpon-if-type {
      prefix bbf-xponift;
    }
    import bbf-xpon-defects {
      prefix bbf-xpon-def;
    }

    include bbf-xpon-base;

    organization
      "Broadband Forum <https://www.broadband-forum.org>
Fiber Access Networks Work Area";

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

Editor:      Robert Peschi, Nokia

Editor:      Kevin Noll, Vecima

PS Leader:   Joey Boyd, Adtran

WA Director: Marta Seda, Calix";

    description
      "This submodule contains a collection of YANG definitions for
managing channel terminations.

Copyright (c) 2018-2023, 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-385i2a1; see
the TR itself for full legal notices.";

    revision "2023-06-21" {
      description
        "Issue 2 Amendment 1.
* Approval Date:    2023-06-21.
* Publication Date: 2023-06-21.";
      reference
        "TR-385i2a1: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385_Issue-2_Amendment-1.pdf>";

    }

    revision "2020-10-13" {
      description
        "Issue 2.
* Approval Date:    2020-10-13.
* Publication Date: 2020-10-13.";
      reference
        "TR-385i2: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385_Issue-2.pdf>";

    }

    revision "2019-02-25" {
      description
        "Initial revision.
* Approval Date:    2019-02-25.
* Publication Date: 2019-02-25.";
      reference
        "TR-385: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385.pdf>";

    }


    feature onu-phase-drift-monitoring-control {
      description
        "Indicates support for the configuration of Optical Network
Unit (ONU) phase drift monitoring.";
    }

    feature channel-termination-defects {
      description
        "Indicates support for reporting defects observed at the channel
termination.";
    }

    feature channel-termination-defect-notifications {
      description
        "Indicates support for reporting state changes of the defects
observed at the channel termination.";
    }

    grouping onu-phase-drift-monitoring-data {
      description
        "The arrival phase of the Optical Network Unit (ONU)
transmission may drift due to aging, temperature changes and
other factors. In those cases, the equalization delay can be
recalculated/updated from the drift of the upstream
transmission. This allows small corrections to be made without
having to re-range the ONU.
Configuration parameters in this grouping govern ONU
upstream transmission phase drift monitoring by an Optical
Line Termination (OLT).";
      reference
        "ITU-T G.984.x clause 10.3.5
        ITU-T G.987.x clause 13.1.6
        ITU-T G.989.x clause 13.1.6
        ITU-T G.9807.x clause 13.1.6.";

      leaf monitoring-interval {
        type union {
          type uint32 {
            range "1..max";
          }
          type enumeration {
            enum "disable" {
              value 0;
              description
                "Disable drift monitoring.";
            }
          }
        }
        units "milliseconds";
        default "1000";
        description
          "Interval in milliseconds for Optical Network Unit (ONU)
transmission phase drift monitoring.";
        reference
          "ITU-T G.984.x clause 10.3.5
          ITU-T G.987.x clause 13.1.6
          ITU-T G.989.x clause 13.1.6
          ITU-T G.9807.x clause 13.1.6.";

      }

      leaf lower-threshold {
        type union {
          type uint32 {
            range "1..max";
          }
          type enumeration {
            enum "itut-recommended-value" {
              value 0;
              description
                "ITU-T recommended value (see reference).";
            }
          }
        }
        units "bits";
        default "itut-recommended-value";
        description
          "Lower threshold in bits. Drift value below this threshold
is considered acceptable and doesn't require any corrective
actions. If drift value averaged over monitoring-interval
exceeds the 'lower-threshold' and doesn't exceed the
'upper-threshold', Optical Line Termination (OLT) must
calculate new equalization delay value and transmit it to the
Optical Network Unit (ONU) using Tanging_Time PLOAM message.
The OLT Channel Termination (CT) also raises a Drift of
Window (DOWi) event.
- US speed 2.48832 Gbps : +- 8 bits
- US speed 9.95328 Gbps : +- 32 bits.";
        reference
          "ITU-T G.984.x clause 10.3.5
          ITU-T G.987.x clause 13.1.6
          ITU-T G.989.x clause 13.1.6
          ITU-T G.9807.x clause 13.1.6.";

      }

      leaf upper-threshold {
        type union {
          type uint32 {
            range "1..max";
          }
          type enumeration {
            enum "itut-recommended-value" {
              value 0;
              description
                "ITU-T recommended value (see reference).";
            }
          }
        }
        units "bits";
        default "itut-recommended-value";
        description
          "The upper threshold establishes the critical bounds beyond
which the transmission drift can affect the other Optical
Network Units (ONU) on the PON. If the drift exceeds the
upper threshold, the Optical Line Termination (OLT) Channel
Termination (CT) declares transmission interference warning
(TIWi) and takes further mitigating actions that may include
deactivation or disabling of the offending ONU-ID, or
execution of a rogue Optical Network Unit (ONU) diagnostic
procedure. The OLT CT also raises a Drift of Window (DOWi)
event.
- US speed 2.48832 Gbps : +- 16 bits
- US speed 9.95328 Gbps : +- 64 bits.";
        reference
          "ITU-T G.984.x clause 10.3.5
          ITU-T G.987.x clause 13.1.6
          ITU-T G.989.x clause 13.1.6
          ITU-T G.9807.x clause 13.1.6.";

      }
    }  // grouping onu-phase-drift-monitoring-data

    grouping channel-termination-config-data {
      description
        "All configuration data for a channel termination.";
      leaf channel-pair-ref {
        type if:interface-ref;
        must
          "derived-from-or-self(/if:interfaces/if:interface[if:name=current()]/if:type,'bbf-xponift:channel-pair') and /if:interfaces/if:interface[if:name=current()]/bbf-xpon:channel-pair/bbf-xpon:channel-pair-type = ../bbf-xpon:channel-termination-type" {
          error-message
            "Must reference a channel pair with the same xPON type as the channel termination.";
        }
        description
          "Reference to a channel pair.";
      }

      leaf channel-termination-type {
        type identityref {
          base bbf-xpon-types:channel-pair-type-base;
        }
        mandatory true;
        description
          "Represents the type of channel termination (e.g.,
TWDM NG-PON2, PtP NG-PON2, XGS-PON, XG-PON, GPON).";
      }

      leaf meant-for-type-b-primary-role {
        type boolean;
        description
          "If 'true', the channel termination is meant to play type B
protection Primary role when it refers to a channel pair.
When false, the channel termination is meant to play
type B protection Secondary role when it refers to a
channel pair.";
        reference
          "ITU-T G.898.3 Amendment 1 (11/2016), section 18.1.";

      }

      leaf ngpon2-twdm-admin-label {
        when
          "derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:ngpon2-twdm')" {
          description
            "Only applicable for Time Wavelength Division
Multiplexing (TWDM) NG-PON2 channel pairs.";
        }
        type uint32 {
          range "0..268435455";
        }
        description
          "For TWDM NG-PON2, the admin-label is configurable and is
28 bits long. It is the configurable part of the PON
Identifier (PON-ID) which is available as state data.";
        reference
          "ITU-T G.989.3 section 6.1.5.3";

      }

      leaf ngpon2-ptp-admin-label {
        when
          "derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:ngpon2-ptp')" {
          description
            "Only applicable for Point-to-Point (PtP) NG-PON2
channel pairs.";
        }
        type uint32 {
          range "0..4194303";
        }
        description
          "For PtP NG-PON2, the admin-label is configurable and is
22 bits long. It is the configurable part of the PON
Identifier (PON-ID) which is available as state data.";
        reference
          "ITU-T G.989.3 section 6.1.5.3";

      }

      leaf xgs-pon-id {
        when
          "derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:xgs')" {
          description
            "Only applicable for XGS-PON channel pairs.";
        }
        type uint32;
        description
          "For XGS-PON, the PON Identifier (PON-ID) is entirely
configurable and is 32 bits long. The PON-ID is also
available as state data.";
        reference
          "ITU-T G.9807.1 section C.10.1.1.1.3";

      }

      leaf xgpon-pon-id {
        when
          "derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:xgpon')" {
          description
            "Only applicable for XG-PON channel pairs.";
        }
        type uint32;
        description
          "For XG-PON, the PON Identifier (PON-ID) is entirely
configurable and is 32 bits long. The PON-ID is also
available as state data.";
        reference
          "ITU-T G.987.3 section E.2";

      }

      leaf gpon-pon-id {
        when
          "derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:gpon')" {
          description
            "Only applicable for GPON channel pairs.";
        }
        type bbf-xpon-types:string-hex14;
        description
          "For GPON, the PON Identifier (PON-ID) is entirely
configurable with any binary value over 7 bytes. The PON-ID
is also available as state data.";
        reference
          "ITU-T G.984.3 section C.2.2";

      }

      leaf pon-tag {
        when
          "not(derived-from-or-self(../bbf-xpon:channel-termination-type,'bbf-xpon-types:gpon'))" {
          description
            "Not applicable for GPON channel pairs.";
        }
        type string {
          pattern '[0-9a-fA-F]{16}';
        }
        description
          "8 bytes. Each octet is represented by two hex values.
Used to specify channel-pair-TAG attribute in NG-PON2,
XGS-PON and XG-PON downstream PLOAM messages.
The 'pon-tag' is not applicable for GPON.";
      }

      leaf ber-calc-period {
        type uint32 {
          range "1..864000";
        }
        units "0.1 seconds";
        default "10";
        description
          "Measurement period used to determine if a Signal Degrade
(SDi) alarm has occurred for an Optical Network Unit (ONU).";
        reference
          "ITU-T G.984.3 section 11.1.3";

      }

      leaf location {
        type identityref {
          base bbf-xpon-types:location-base;
        }
        description
          "Indicates whether the Channel Termination (CT) is physically
inside the Optical Line Termination (OLT) i.e., can be
related to a port in the OLT hardware model or physically
part of another OLT.";
      }

      container onu-phase-drift-monitoring-control {
        if-feature bbf-xpon:onu-phase-drift-monitoring-control;
        description
          "Optical Network Unit (ONU) Phase Drift monitoring
configuration.";
        uses onu-phase-drift-monitoring-data;
      }  // container onu-phase-drift-monitoring-control

      leaf-list notifiable-defect {
        if-feature bbf-xpon:channel-termination-defect-notifications;
        type identityref {
          base bbf-xpon-def:items-detected-at-olt-for-ct;
        }
        description
          "Optical Line Termination (OLT) is expected to generate a
'defect-state-change' notification each time defect(s)
listed in this leaf-list are raised or cleared.
If 'notifiable-defect' includes an identity which
is the base value for other defect(s) identity(ies),
the OLT will generate a single notification when status of
any defect derived from this base value changes.

In case the leaf-list is empty (as by default) the OLT
should not generate any 'defect-state-change'
notification.";
      }
    }  // grouping channel-termination-config-data

    grouping channel-termination-oper-data {
      description
        "All oper data for a channel termination.";
      leaf pon-id-display {
        type bbf-xpon-types:pon-id-display-type;
        description
          "The PON Identifier (PON-ID) of the channel termination.
Per ITU-T G.989.3, ITU-T G.9807.1, ITU-T G.987.3 and
ITU-T G.984.3, depending of the xPON type some part
of this object is configured by the operator and the
other part is genuine operational data determined by
the system.";
      }

      leaf type-b-state {
        type identityref {
          base bbf-xpon-types:type-b-state-base;
        }
        description
          "The type B protection state of the Channel Termination (CT);
it will typically be active/standby. When the channel
termination is not yet referring to a channel pair, it is not
part of any type B protection scheme (and not usable either);
in that case its type-b-state has the value
'not-part-of-type-b.";
        reference
          "ITU-T G.989.3 Amendment 1 clause 18.2";

      }

      leaf location {
        type identityref {
          base bbf-xpon-types:location-base;
        }
        description
          "Indicates whether the Channel Termination (CT) is physically
inside the Optical Line Termination (OLT) i.e., can be
related to a port in the OLT hardware model or physically
part of another OLT.";
      }

      leaf-list active-defects {
        if-feature bbf-xpon:channel-termination-defects;
        type identityref {
          base bbf-xpon-def:items-detected-at-olt-for-ct;
        }
        description
          "Defects detected by Optical Line Termination (OLT) for
Channel Termination (CT).

All applicable identities should be provided as value.";
        reference
          "ITU-T G.984.3 (01/2014) 11.1.1
          ITU-T G.987.3 (01/2014) 14.2.1
          ITU-T G.989.3 (2015)/Amd.2 (11/2018) Table 14-2
          ITU-T G.9807.1 (2016)/Amd.1 (10/2017) Table C.14.2";

      }

      leaf-list sufi-affected-onus {
        if-feature bbf-xpon:channel-termination-defects;
        type bbf-xpon-types:onu-serial-number;
        description
          "List of Optical Network Units (ONU) that have exhibited a
start-up failure (SUFi).";
        reference
          "ITU-T G.984.3 (01/2014) 11.1.1 SUFi
          ITU-T G.987.3 (01/2014) 14.2.1 SUFi
          ITU-T G.989.3 (2015)/Amd.2 (11/2018) Table 14-2 SUFi
          ITU-T G.9807.1 (2016)/Amd.1 (10/2017) Table C.14.2 SUFi";

      }

      notification defect-state-change {
        if-feature bbf-xpon:channel-termination-defect-notifications;
        description
          "A notification traceable to a channel-teremination which
signifies that defect(s) detected by an Optical Line
Termination (OLT) have been raised and/or cleared. Such
notification is only generated for defects listed in the
'notifiable-defect' leaf list.";
        list defect {
          key "type";
          description
            "A notifiable defect that has changed state since
the previous 'defect-state-change' notification.";
          leaf type {
            type identityref {
              base bbf-xpon-def:items-detected-at-olt-for-ct;
            }
            description "Defect type.";
          }

          leaf state {
            type bbf-xpon-def:defect-state;
            mandatory true;
            description
              "The current defect state.";
          }

          leaf last-change {
            type yang:date-and-time;
            mandatory true;
            description
              "The Optical Line Termination (OLT) system date and
time when the OLT has declared that the defect state
has changed.";
          }
        }  // list defect
      }  // notification defect-state-change
    }  // grouping channel-termination-oper-data

    augment /if:interfaces/if:interface/bbf-xpon:channel-termination {
      description
        "Configuration of an xPON channel termination.";
      uses channel-termination-config-data;
    }

    augment /if:interfaces-state/if:interface/bbf-xpon:channel-termination {
      description
        "State data of an xPON channel termination.";
      uses channel-termination-oper-data;
    }
  }  // submodule bbf-xpon-channel-termination-body