Fibre optic duct closures requirement of Nokia Poland

1. General requirements

Fiber optic duct closures must be suitable for installation in cable ducts in the Nokia network. The closures must be able to connect cables of loose tube construction with G652/G657 fibers while maintaining an appropriate bending radius.

2 Application table

The following table in Table 1.1 shows the minimum requirements for closure configurations in the different application variants.

Table 1.1 – Minimum requirements for the configuration of the 1FCP closure in different application variants.

Location	Splitter / Patching	48F	72F	96F	144F
Mounting in Cable ducts	No Splitter	YES	YES	YES	YES
	Two Splitter(1:8 or 1:4)	YES	YES
	No patching field	YES	YES	YES	YES
	Patching field	YES

3. Total closure capaciy

The closure must be able to do so:

making of 48/72/96/144 fiber optic splices,
Installation up to 2 optical splitters (1:8 or 1:4) in a mini-metal-box enclosure,
Mounting of at least 18 SC/APC adapters.

4. Construction

The closures should be of multiple access design. The design must be such that it is possible to integrate with the cable overlength frame. The closure must be equipped with a minimum:

2 round ports for cable entry with diameters from 8 mm to 15 mm, mechanically or thermally sealed,
1 oval (double) port for cable entry with diameters from 5 mm to 15 mm without cutting through cable tubes, mechanically or thermally sealed,
8 round ports from 5 mm to 8.2 mm mechanically sealed.

The closure must have a fixture for the cable strength element, which prevents the cable from being pulled out. The construction of the closure must allow it to be installed in a cable container with a room for closure with holders for a 275 mm diameter and 385 mm long.

5 Basic closure equipment

Each closure should be equipped with:

splice trays for a minimum of 72 splices,
space for a minimum of 2 splitters in a mini-metal-box enclosure (1:4, 1:8),
cable port seals,
Cable ties,
bracket for fixing the cable strength element,
the necessary screws and mounting tapes,
closure mounting bracket for mounting the closure on the manhole wall.

6. Additional closure accessories

Each closure should be expandable with the following elements:

additional splice trays enabling the expansion of the closures to 144 splices or a bracket for the assembly of at least 18 patching ports,
splicing H/S protectors,
Cable overlength frame with mounting bracket integrated in the closure, enabling installation in the manhole,
SC/APC adapters.

7. Temperature range

Installation: from -10O^oC to +60^oC
Transport and storage: from -40^oC to +70^oC
Operation: -30^oC to +70^oC

8. Functional requirements

The following table in Table 1.2 shows the functional requirements for the 1FCP fiber optic duct closure.

Application	Ducts (M/H, H/H)
Underground/wall/pole installation(U/W/P)	U (underground)
IP rating	IP67 or higher
Maximum dimensions(LxWxH) [mm xmm xmm]	450x300x200
Portection against UV(carbon black index %)	2.5 ± 0.5
Minimum number of ports	11
Input cable diameter(mm)	5 to 15
Number of splices	48/72/96/144
Bending radius (mm)
G652	30
G657	15
Splice tray capacity	12 or 24
Minimum FO cable extra-length (in cm) in conversion to the fibre	250
Mid-span splicing option (Y/N)	Y
Splitter installation (minibox) 1×4, 1×8 (Y/N)	Y
Sealing (Mechanical (M) / Heat Shrinkable (HS))	M/HS
Tray marking (Y/N)	Y

1.9 Test

The manufacturer will provide Nokia with references to standards. The tests listed below are Nokia’s minimum requirements.

1.9.1 General test

No chemical reaction, even in the long term, between all components and the material used in the production of the closure: plastics, metal, covers, filling, glue, fiber optic cables FO, PEHD, etc. The material used must not pose a risk to health or safety. A safety certificate must be presented. The closure should be UV-resistant according to the defined black carbon index. The closure cover must be resistant to solvents.

1.9.1.1 Quality control – inspection and measurement

Measurements will be carried out using standard methods. The supplier will provide Nokia with references to standards. This section contains criteria for the visual and mechanical inspection of fiber optic fragments, connectors and passive components. The control method may be used at any stage of the qualification or quality assurance process, as a self-test, or as a test required by the corresponding specification. The closure must not bear any visual signs of damage. The marking shall be legible and in accordance with the relevant specification. Dimensions must be in accordance with the documentation.