module bbf-xpon-onu-types {

    yang-version 1.1;

    namespace
      "urn:bbf:yang:bbf-xpon-onu-types";

    prefix bbf-xpon-onu-types;

    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:      Joey Boyd, ADTRAN

Editor:      Igor Ternovsky, Broadcom

Editor:      Robert Peschi, Nokia

WA Director: Marta Seda, Calix

WA Director: Samuel Chen, Broadcom";

    description
      "This module contains a collection of YANG definitions for
supporting the Broadband Forum requirements on management of
ITU-T Passive Optical Network (PON) interfaces as defined in
ITU-T G.984.x, G.987.x, ITU-T G.989.x and ITU-T G.9807.x. As
such, this module is specific to access network equipment (e.g.,
BBF-specified Access Nodes and FTTdp DPUs).

Specifically, this module defines common YANG types used in the
management of Optical Network Units (ONU).

Copyright (c) 2018-2020, 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-385i2; see
the TR itself for full legal notices.";

    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>";

    }


    identity onu-presence-state-base {
      description
        "This identity is used to qualify the presence state of an
Optical Network Unit (ONU).";
    }

    identity onu-present {
      base onu-presence-state-base;
      description
        "This identity is used to denote that an Optical Network Unit
(ONU) is currently using the optical signal of one of the
channel terminations local to this Optical Line Termination
(OLT) (Refer to 'inside-olt'). An OLT considers that an ONU is
using the optical signal of one of its local channel
terminations as early as it receives from the ONU a Physical
Layer Operations, Administrations and Maintenance (PLOAM)
Serial_Number_ONU message or as early as it receives a PLOAM
Tuning_Resp(Complete_u) message and as long as the ONU keeps
sending optical signal to the OLT though this channel
termination, either spontaneously or upon OLT solicitation
(for instance consistently responding to Downstream PLOAM
messages or consistently responding to bandwidth map messages).
If an ONU has shown initial optical activity and is not
solicited by the OLT, e.g. after it failed to reach O5, it will
be considered not present if it does not spontaneously show
optical activity anymore after some time limit (recommended
value for time limit is in the order of 10s or 20s, compatible
with TO1 Ranging Time). As an exception, an ONU put in ITU-T
'Emergency Stop state' because the OLT sent it a
'Disable_Serial_Number' downstream PLOAM when it was present on
a channel termination is still considered 'present' on the
channel termination.";
      reference
        "ITU-T G.984.3, section 10.2.1
        ITU-T G.987.3, section 12.2.1
        ITU-T G.9807.1, Table C.12.2
        ITU-T G.989.3, Table 12-2";

    }

    identity onu-present-and-on-intended-channel-termination {
      base onu-present;
      description
        "In case of G-PON, XG-PON and XGS-PON this identity applies to
an Optical Network Unit (ONU) which is present on a channel
termination local to this Optical Line Termination (OLT)
(Refer to 'inside-olt') and which corresponds to a local
virtual Access Network Interface (vANI) and has reached ONU
Transmission Convergence (TC) state O5.

In case of NG-PON2 this identity applies to an ONU which is
present on a channel termination local to this OLT (Refer to
'inside-olt') and which corresponds to a local virtual Access
Network Interface (vANI) and has reached ONU TC state O5
and for which it has been confirmed (e.g. by Inter Channel
Termination Protocol (ICTP) procedures) that the ONU is using
the intended channel-termination based on the configured
preferred and/or protection channel pair or resulting from the
execution of an 'in-service-onu-tune-request' action.";
    }

    identity onu-present-and-in-wavelength-discovery {
      base onu-present;
      description
        "This identity is used to denote that an NG-PON2 Optical Network
Unit (ONU) has just been detected present on a channel
termination local to this Optical Line Termination (OLT) (Refer
to 'inside-olt') and which has reached ONU Transmission
Convergence (TC) state O5, but which potentially still needs to
tune to another wavelength while the OLT is assessing the
intended channel termination of the ONU.";
    }

    identity onu-present-and-discovery-tune-failed {
      base onu-present;
      description
        "This identity is used to denote that an NG-PON2 Optical Network
Unit (ONU) has just been detected present on a channel
termination local to this Optical Line Termination (OLT)
(Refer to 'inside-olt') and which has reached ONU Transmission
Convergence (TC) state O5, but which is not on its intended
channel termination and which could not be tuned away towards
the identified intended channel termination.";
    }

    identity onu-present-and-no-v-ani-known-and-o5-failed {
      base onu-present;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') but for which no
corresponding virtual Access Network Interface (vANI) could
(yet) be identified and which could not reach ONU Transmission
Convergence (TC) state O5.";
    }

    identity onu-present-and-no-v-ani-known-and-o5-failed-no-onu-id {
      base onu-present-and-no-v-ani-known-and-o5-failed;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') but for which no
corresponding virtual Access Network Interface (vANI) could
(yet) be identified and which could not reach ONU Transmission
Convergence (TC) state O5 because the OLT could not determine
an ONU-ID for this ONU.";
    }

    identity onu-present-and-no-v-ani-known-and-o5-failed-undefined {
      base onu-present-and-no-v-ani-known-and-o5-failed;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') but for which no
corresponding virtual Access Network Interface (vANI) could
(yet) be identified and which could not reach ONU Transmission
Convergence (TC) state O5 because of some unidentified
reason.";
    }

    identity onu-present-and-v-ani-known-and-o5-failed {
      base onu-present;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') and for which a
corresponding virtual Access Network Interface (vANI) could be
identified but which could not reach ONU Transmission
Convergence (TC) state O5.";
    }

    identity onu-present-and-v-ani-known-and-o5-failed-no-onu-id {
      base onu-present-and-v-ani-known-and-o5-failed;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') and for which a
corresponding virtual Access Network Interface (vANI) could be
identified but which could not reach ONU Transmission
Convergence (TC) state O5 because the OLT could not determine
an ONU-ID for this ONU.";
    }

    identity onu-present-and-v-ani-known-and-o5-failed-undefined {
      base onu-present-and-v-ani-known-and-o5-failed;
      description
        "This identity applies to an Optical Network Unit (ONU) which is
present on a channel termination local to this Optical Line
Termination (OLT) (Refer to 'inside-olt') and for which a
corresponding virtual Access Network Interface (vANI) could be
identified but which could not reach ONU Transmission
Convergence (TC) state O5 because of some unidentified
reason.";
    }

    identity onu-present-and-no-v-ani-known-and-in-o5 {
      base onu-present;
      description
        "This identity applies to a G-PON, XG-PON or XGS-PON Optical
Network Unit (ONU) which is present on a channel termination
local to this Optical Line Termination (OLT) (Refer to
'inside-olt') and which has reached ONU Transmission
Convergence (TC) state O5 but for which no corresponding
virtual Access Network Interface (vANI) could be identified.";
    }

    identity onu-present-and-no-v-ani-known-and-unclaimed {
      base onu-present;
      description
        "This identity applies to an NG-PON2 Optical Network Unit (ONU)
which is present on a channel termination local to this Optical
Line Termination (OLT) (Refer to 'inside-olt') but for which no
corresponding virtual Access Network Interface (vANI) could be
identified and which has passed ONU Transmission Convergence
(TC) state O5 and for which no intended channel termination
could be identified (for instance by means of Inter Channel
Termination Protocol (ICTP) procedures).";
    }

    identity onu-present-and-v-ani-known-but-intended-ct-unknown {
      base onu-present;
      description
        "This identity applies to an NG-PON2 Optical Network Unit (ONU)
which is present on a channel termination local to this Optical
Line Termination (OLT) (Refer to 'inside-olt') and for which a
corresponding virtual Access Network Interface (vANI) could be
identified and which has passed ONU Transmission Convergence
(TC) state O5 but for which no intended channel termination
could be identified (for instance by means of Inter Channel
Termination Protocol (ICTP) procedures).";
    }

    identity onu-present-and-emergency-stopped {
      base onu-present;
      description
        "This identity applies to a G-PON, XG-PON, XGS-PON or NG-PON2
Optical Network Unit (ONU) to which the Optical Line
Termination (OLT) has sent a 'Disable_Serial_Number' downstream
Physical Layer Operations, Administrations and Maintenance
(PLOAM) when it was present on a channel termination local to
the OLT (Refer to 'inside-olt') which has put the ONU in ITU-T
'Emergency Stop state'.";
      reference
        "ITU-T G.984.3 Section 9.2.1
        ITU-T G.987.3 Table 11.2
        ITU-T G.9807.3 Table C.11.2
        ITU-T G.989.3 Table 11.2";

    }

    identity onu-not-present {
      base onu-presence-state-base;
      description
        "This identity is used to denote that from the Optical Line
Termination (OLT) point of view, the Optical Network Unit (ONU)
is not present on the OLT, i.e. the ONU is not transmitting
optical signal in upstream on any channel termination local to
this OLT (Refer to 'inside-olt') and is neither assumed to
accept any optical signal in downstream from any channel
termination local to this OLT. This could mean for instance
that the ONU is present on a channel termination belonging to
another OLT (Refer to 'outside-olt'), or that the ONU is not
connected at all to the channel group.";
    }

    identity onu-not-present-with-v-ani {
      base onu-not-present;
      description
        "This identity is used to denote that an Optical Network Unit
(ONU), for which a virtual Access Network Interface (vANI) is
configured on the Optical Line Termination (OLT), is not
present on any channel termination local to this OLT.";
    }

    identity onu-not-present-without-v-ani {
      base onu-not-present;
      description
        "This identity is used to denote that an Optical Network Unit
(ONU), for which no virtual Access Network Interface (vANI) is
configured on the Optical Line Termination (OLT), is not
present any longer on any channel termination local to this
OLT. This could mean that the ONU has been disconnected from
the channel group; in case of NG-PON2 it could also mean that
the ONU is tuned away to a channel termination belonging to
another OLT (Refer to 'outside-olt').";
    }
  }  // module bbf-xpon-onu-types