Attachment_J3_-_FRS_-_7_Oct_16.pdf

FUNCTIONAL REQUIREMENTS SPECIFICATION

Fiber Infrastructure for Next Generation Optical

Transmission

FINAL VERSION

07 Oct 2016

1 FIBER INFRASTRUCTURE

The DISN transport backbone is a physically diverse, secure high-speed transport network. It is described more specifically as follows:

1. A meshed switched optical network across North America, Europe, and Pacific Theaters.

2. A network consisting of Dense Wave Division Multiplexing (DWDM) Reconfigurable Optical Add/Drop Multiplexers (ROADMs) and Optical Line Amplifiers (OLAs).

3. A meshed switched optical network, which provides for multiple service options at the optical layer including wavelength services.

This section describes the functional specifications required for the optical fiber cable to be used in the DISN. Specifically, this section states the requirements for:

• Fiber Service Delivery Point (FSDP)

• Fiber Optic Cable

• Outside Plant

1.1 Fiber Service Delivery Point (FSDP) and Fiber Span

1.1.1 Definition of Fiber Service Delivery Point (FSDP)

A Fiber Service Delivery Point (FSDP) is defined as a point where dark fiber terminates at a fiber patch panel which is collocated (i.e. within the same building) with an active DoDIN network element (e.g. OLA or ROADM). Thus, FSDPs can be physically located at both Government buildings and intermediate commercial facilities or “huts” [e.g. Controlled Environmental Vaults (CEVs) or Central Offices (COs)]. The FSDP for the fiber shall be a fiber optic patch panel with all fibers terminated (see Figure 1).

1.1.2 Definition of Span

A span is defined as a length of outside fiber optic cable (including connectors and/or splices) from one FSDP to an adjacent FSDP (see Figure 1) which does not contain any active network elements (e.g. OLAs or ROADMs) along the span.

1.1.3 Definition of Segment

A segment is defined as a length of outside fiber optic cable which originates at one Government Service Delivery Node (SDN) and terminates at another Government SDN. A segment is made up of one or more fiber spans (and thus contains two or more FSDPs).

Figure 1 Notional Fiber Segment and Span Depiction

1.2 Fiber Optic Cable

1.2.1 General Requirements

Fiber optic cable will be a mission critical, physical component of the DISN. The fiber shall be of high quality; robust and able to support a myriad of functions in order to meet the overall stringent performance requirements for the DISN. Hereafter, for the described fiber criteria, [R] denotes required and [D] denotes desired.

1.2.1.1 [R] The fiber shall meet the standards put forth in the following International

Telecommunication Union Telecommunication Standardization Sector (ITU-T) G.652 (11/2009), G.654 (10/2012), G.655 (11/2009), and G.656 (07/2010) except where superseded by the following more specific requirements here within. These detailed requirements will be outlined in the following sections.

1.2.1.2 [R] DSF, LS and MetroCore fiber types are not considered acceptable.

1.2.1.3 [D] For new installations, it is desired that the fiber comply with ITU-T G.654.C (10/2012) specifications.

SDN

SDN

OLA

FSD FSD

SPAN SPAN

Government Base / Site

Government Base / Site

FSD

Fiber Optic

O Fiber Optic

HUT HUT

1.2.2 Fiber Count

1.2.2.1 [R] Fiber Optic Cable strands (one pair) shall be provided between designated Government SDNs.

1.2.2.2 [R] If a new access fiber cable installation is to be fusion spliced to a commercial vendor backbone fiber, then the new fiber cable shall consist of 12 or 24 fiber strands (depending on the requirements for the specific installation) in a single duct.

1.2.2.3 [R] If an entire fiber span (SDP to SDP) is to be a new installation, then that fiber cable shall consist of 24, 48, 96, or 192 fiber strands (depending on the requirements for the specific installation).

1.2.2.4 [D] All new fiber installations shall also have an empty duct alongside the single duct to facilitate future growth.

1.2.2.5 [R] These new ducts shall be a minimum 50 mm in diameter.

1.2.3 Fiber Performance

1.2.3.1 [R] The fiber shall meet the following criteria listed below. These criteria are based on a single span of fiber (from FSDP to adjacent FSDP).

1.2.3.2 [R] The fiber span attenuation per kilometer due to all impairments shall be less than 0.23db/km at 1550nm at fiber end of life (EOL). Attenuation per kilometer will be calculated by dividing the total distance of the span by the total loss less 0.5db to account for the connector loss at each end.

1.2.3.3 [R] Regardless of fiber span length, the EOL total span attenuation shall be less than 1 dB from the initial/ Beginning of Life (BOL) value.

1.2.3.4 [R] The chromatic dispersion measured at 1550 nm shall be >= 2.0 ps/km nm.

1.2.3.5 [D] The chromatic dispersion measured at 1550 nm shall be >= 4.0 ps/km nm.

1.2.3.6 [R] Installation of all fiber shall comply with ITU-T G.655 (11/2009), ITU-T K.25

(02/2000), ITU-T L.35 (10/1998), and Telcordia GR-20-CORE.

1.2.3.7 [R] Any single reflectance event shall be less than -40 dB.

1.2.3.8 [R] The connector reflectance at the FSDP shall be less than -50 dB.

1.2.3.9 [R] The connector insertion loss shall be less than 0.25 dB.

1.2.3.10 [R] The splice insertion loss shall be less than 0.2 dB.

1.2.3.11 [R] The connector shall tolerate a minimum of +33 dBm incident power.

1.2.3.12 [R] The fiber Optical Return Loss (ORL) shall be greater than 30 dB.

1.2.3.13 [R] For all currently installed fibers, the fiber age (i.e., from manufacture date) shall be less than 20 years old.

1.2.3.14 [R] The accumulated insertion losses within 20 km of any node shall be less than 1.0 dB.

1.2.3.15 [R]The insertion loss for a single event within 20 km of any node shall be less than 0.5dB.

1.2.3.16 [R] The reflection for a single event within 20 km of any node shall be less than -33.0 dB.

1.2.3.17 [R] The accumulated reflection within 20 km of any node shall be less than -27.0 dB.

1.2.4 Outside Plant

1.2.4.1 [R] All optical fiber, optical fiber cable bundles, and optical fiber ribbons shall adhere to the requirements as specified in Telcordia GR-20-CORE.

1.2.4.2 [R] All fiber cables shall also meet the requirements of ANSI/ICEA S-87-640-1992, “Standard for Fiber Optic Outside Plant Communications Cable”.

1.2.4.3 [R] The Contractor shall be responsible for all permits, easements, and rights of way, to include Host Nation agreements/approvals. All work shall be done in accordance with the requirements listed in the following sections unless superseded by the local Government regulations

1.2.4.4 [R] The Contractor shall provide optical fiber infrastructure using underground installation procedures per Section 1.2.7.

1.2.4.5 [CR] If an underground installation is deemed cost prohibitive due to environmental constraints (e.g., rock, etc.), the Contractor shall provide optical fiber infrastructure using aerial installation procedures per Section 1.2.8 or underwater installation procedures per Section 1.2.9.

1.2.4.6 [R] The fiber optic cable between any two SDNs shall be installed such that it produces less than 200 rad/sec of polarization drift [(dynamic change in State of Polarization

(SOP)].

1.2.4.7 [R] The fiber optic cable between any two SDNs shall be installed such that it produces less than 1 dB of power fluctuation.

1.2.4.8 [R] The fiber optic cable between any two SDNs shall be installed such that barring a cable cut, its performance shall not vary enough to degrade transmission. This implies that changes of environment (e.g., temperature, physical external forces, wind, etc.) shall not degrade the performance of the fiber.

1.2.5 Physical Path

This physical fiber path can consist of a path that is (1) currently part of a carrier’s own fiber optic backbone network, (2) an access path, which extends from a carrier’s fiber backbone to an SDN, or (3) an access path, which extends between two SDNs without the need to use a carrier’s fiber backbone. Fiber optic cable shall be suitable for the environment in which it is installed and shall adhere to the requirements in the following sections unless superseded by the local Government regulations.

1.2.5.1 [R] Contractor is responsible to work with the Government to resolve any issues on the fiber path from Service Delivery Node (SDN) to SDN, to include contractor backbone, access paths and any Government Furnished Equipment (GFE) fiber routes to meet the specifications of this document.

1.2.5.2 [R] The fiber path between any two points shall be the most direct path feasible.

1.2.5.3 [R] As an option, the Contractor shall, at the Government’s request, provide fiber between the two SDNs at a particular site(s).

1.2.5.4 [R] No DISN fiber pair shall travel in the same physical path or through the same physical facilities as any other DISN fiber pair.

1.2.5.5 [R] All SDNs shall have at least two diverse access paths.

1.2.5.6 [R] If an SDN has 3 fiber pairs coming to/from it, all three access pairs must be diverse (see Figure 2).

1.2.5.7 [R] Where dark fiber is proposed for routes spanning a body of water, the Contractor shall utilize 2 separate tubes (within/on the structure) in order to satisfy physical diversity requirements.

1.2.5.8 [R] DISN fiber paths shall retain a minimum separation of 15 meters from other DISN fiber paths, except where two access paths are within 50 meters of the base boundary, but it is desired they be as far apart as possible.

1.2.5.9 [R] For any and all DISN fiber paths which cross over one another the Contractor shall provide a specific mitigation strategy on a case by case basis, if the Contractor cannot meet the diversity requirement in FRS paragraphs 1.2.5.4 and 1.2.5.5 (e.g. will maintain a vertical separation of a minimum of 5 meters; will reinforce one path with concrete encasement, etc.)

1.2.5.10 [R- Defense Threat Reduction Agency Balanced Survivability Assessment, Critical Infrastructure Protection Plan] Fiber paths shall maintain a minimum of 6 ft.

separation within the facilities.

1.2.5.11 [D] The fiber optic cable between the Government FSDPs shall be of the same type.

Figure 2 Diversity Requirements for the Notional Optical Mesh Network

1.2.6 Splicing and Miscellaneous Handling Requirements

1.2.6.1 [R] All splicing shall be performed using a fusion-splicing technique.

1.2.6.2 [R] Connectors shall only be present at equipment interface points at FSDPs.

1.2.7 Underground Installations

1.2.7.1 [R] Direct-buried fiber is not acceptable; a conduit/duct shall protect the fiber.

1.2.7.2 [R] A fiber shall be buried at a minimum depth of 42 inches or below the frost line whichever is deeper. For areas where the fiber is not buried at a minimum of 42 inches the Contractor shall provide an explanation as to the reason for this deviation and any risk mitigation approaches used (e.g. fiber is encased in steel conduit).

1.2.7.3 [R] During plowing or trenching of a facility, a warning tape shall be placed no less than 24 inches above the conduit and no less than 12 inches below grade.

1.2.7.4 [R] A buried fiber cable shall have a locating wire or conductive shield.

1.2.7.5 [R] For open trench and plowed construction, a warning tape shall be installed above the fiber pathway and permanently marked with a warning message advising that a fiber optic cable is below the tape.

1.2.7.6 [R] Surface warning markers shall be installed every 1300 ft., as well as at road crossings and culverts.

1.2.7.7 [R] For all fiber cable within a conduit, the cable may be without armor wrap, but shall be installed in conduit appropriate for the local conditions and necessary protection from electrical discharge and rodents.

1.2.8 Aerial Installations

1.2.8.1 Aerial fiber includes fiber along a bridge span. If aerial fiber is used, it shall adhere to the following requirements:

1.2.8.2 [R] Aerial fiber shall only be considered where buried conduit is neither available nor possible to construct.

1.2.8.3 [R] Aerial fiber shall be encased in conduit on a physically secure structure.

1.2.8.4 [R] Pole line fiber is acceptable only where no other means is available. This fiber cable shall be enclosed in a protective structure (i.e. one that minimizes impact of weather/environmental effects such as wind, rain, snow, ice, excessive sunlight, etc.) for every aerial installation.

1.2.8.5 [R] Pole line fiber shall be, as a minimum, a dual armored cable.

1.2.8.6 [R]Pole line fiber shall be attached to a support wire or stranded messenger cable, double- lashed at minimum.

1.2.8.7 [R] The cable and all associated hardware shall meet local Government requirements for clearances over roads, driveways, freeways, rail lines, structures, waterways, or other areas. All installation practices shall include calculation of strand sag, down-guys, over-head guying, anchors, and related items.

1.2.9 Underwater Installation

1.2.9.1 [R] Underwater and Marine cabling shall conform to International, National, State and

Local laws, regulations and standards.

1.2.9.2 [R] Underwater and marine cabling shall be armored and installed in such a manner and location (e.g. not a high threat area) to protect it against external aggression (e.g.

anchors, fishing equipment, hooks, grapnels, coral, rocks, sharks, etc.)

1.2.10 Fiber Characterization Test Requirements and Deliverables

1.2.10.1 [R] OTDR traces shall be conducted at 1550

1.2.10.2 [R] Minimum 1 km launch reel shall be used or shall specify the launch reel distance used during testing.

1.2.10.3 [R] Unidirectional OTDR trace shall be conducted for each fiber on both sides for the first 40km with a 1000ns pulse width.

1.2.10.4 [R] Unidirectional OTDR traces shall be conducted for each fiber shot from each side with appropriate OTDR settings for the span distance.

1.2.10.5 [R] Bidirectional OTDR traces at 1550 report for each fiber for the full distance of the fiber span.

1.2.10.6 [R] CD Measurement shall be taken

1.2.10.7 [R] PMD Measurement shall be taken

1.2.10.8 [R] Bidirectional ORL shall be conducted at 1550

1.2.10.9 [R] Bidirectional OPM measurement for loss shall be take in each direction and averaged loss

1.2.10.10 [R] Acceptable file format and naming shall be used.

1.2.10.11 [R] Report shall identify the location and fiber identifier tested

1.2.10.12 [R] OTDR files/reports shall be provided in both raw form and in .PDF format

1.2.10.13 [R] Report shall include detailed fiber information to include fiber type, manufacturer, age, span length, aerial or buried and GIS data (ie; Google Earth KMZ) depicting the fiber routes.

1.2.10.14 [R] Report shall identify mixed fiber between spans; Report shall describe the make-up of the fibers in a span, fiber type and distance for each sub-subspan as shown in Figure 3. Format for report is attached as Appendix A – Link Fiber Details Form.

Figure 3 Mixed Fiber Between Network Elements

1.2.11 High Power Raman Requirements

1.2.11.1 For some applications the span length could be higher than 200km where higher power (1.5W or higher) Counter-Pump or Co-Pump in addition to Counter-Pump Raman amplifiers might be required for operation. In these situations amplifier might need to be spliced to outside fiber with more stringent loss requirements on the fiber for required Raman gain.

1.2.11.2 OTDR Trace Setup Requirements

• Minimum 1km launch cable is required.

• Measurements must be made from both ends of the link.

• Below is an example setup and may differ based on technology, Raman type, or other factors.

OTDR Test Setup

Wavelength Pulse Width

Span Range

Averaging Time

0 - 10km 1310 100 ns ≥ 20 km ≥ 1 min Sampling and averaging shall be sufficient to detect discrete losses as small as 0.05 dB 0 - 10km 1550 100 ns ≥ 20 km ≥ 1 min

10 - 25km 1310 1 μsec ≥ 50 km ≥ 3 min Sampling and averaging shall be sufficient to detect discrete losses as small as 0.1 dB 10 - 25km 1550 1 μsec ≥ 50 km ≥ 3 min

Figure 4 High-Powered Ramans – OTDR Test Setup

1.2.11.3 Fiber Pass or Fail Criteria

Individual Loss Event Criteria Application RX Fiber

0 - 10km RX Fiber

10 - 25km TX Fiber 0 - 10km

TX Fiber 10 - 25km

Counter Pump Only ≤ 0.1 dB ≤ 0.2 dB N/A N/A Co-Pump and Counter Pump ≤ 0.1 dB ≤ 0.2 dB ≤ 0.1 dB ≤ 0.2 dB

Figure 5 High-Powered Ramans – Fiber Pass or Fail Criteria