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Home / News / CTO INTERIOR MULTIOPERADOR (2012 – ERQ.F6.0232)

CTO INTERIOR MULTIOPERADOR (2012 – ERQ.F6.0232)

CTO INTERIOR MULTIOPERADOR  (2012 - ERQ.F6.0232)

INTRODUCTION

ABSTRACT

The document defines the minimum specifications that the “indoor modular optical termination box” must satisfy when using it on FTTH network deployments.

The elements described at the document constitute the interconnection point between the feeding/distribution network managed by the service operators and the vertical distribution network inside the buildings.

The features and design of this box will allow sharing the building with other two service operators, and sharing the distribution or last mile access network deployed by the first operator.

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

 

FUNCTIONALITY

The elements described at this document constitute an interconnection point between the new fiber optic networks deployed inside the buildings and the last mile networks managed by the service operators.

The elements described will be installed at the building’s Internal Telecommunications Room; these elements will constitute an interconnection point that will allow sharing the last mile access network by different operators. Inside these elements, the operators will connect the last mile access network with the building’s inner distribution network; in addition the new elements will establish different maintenance responsibilities divided in operator’s property modules and building’s property modules.

The elements will also be useful installed at buildings without Internal Telecom. Room but with a single vertical distribution network able to be shared by different operators. In that particular case, the elements will be installed at building common areas: garage, electrical room, etc.

The design of the element will be a modular box, that way we can install several modules stacked one above the other depending on the number of clients of the building and the number of operators sharing the last mile access network. Two types of basic modules considered:

Building Module. The fibers of the building’s distribution network will be accessible using SC/APC connectors and a building’s patch panel. Therefore, the fibers of the vertical distribution cable (“riser”) will access inside the module, then the fibers will be spliced with 900um SC/APC pigtails, and the pigtails will be routed to a 48 SC/APC patch panel.

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

Operator Module. This element will allow mid-span branching of the operator’s feeder cable and buffers storage. The feeder cables provide the active service fibers for storage and connect inside the module, feeder cables also contain other fibers that will pass through the module in direction to other buildings. Part of the active fibers will be connected with splitter’s input fibers inside the module. The rest of active fibers will be stored inside the module and used for future point-to-point fiber circuits. The module has space to house 1x16 optical splitters with SC/APC assembled outputs and has routing and storage elements for the splitter outputs, these SC/APC splitter outputs will be connected to a patch panel. The module must house trays for fiber splicing (active feeder fibre spliced with splitter’s input fiber) and with fiber storage area. In case of point-to-point fiber circuits, the trays must house splices between feeder active fibers and SC/APC pigtails and must route/store the pigtails properly.

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

Caja terminal óptica modular para interior de edificios 48 conectores SCAPC

As a general rule, for the first installation will be used a “Building Module” and an “Operator Module” below in case of using riser cables. If the number of clients per building is more than 48 clients then we’ll install as modules as necessary to cover the 100% of clients.

In case of don’t use riser cable, the building distribution network will be deployed with drop cables from the “Operator Module” to the final client, a single “Operator Module” will be installed to cover up to 16 clients by using the drop cables and NO “Building Module” will be installed.

The connection between the 2 types of modules (“Building”/”Operator”) to register a new client will be done by using a SC/APC patchcord (2.4mm diameter, G657AB), the patchcord length will allow the connection of each position of the “Building Module” patch panel with any position of the “Operator Module” patch panel. For adjacent modules the patchcord length must be 60cm (major lengths will be considered in case of using more than 2 modules).

The max splitter capacity of the “Operator Module” is three 1x16 optical splitters, except for the case of using drop cables where only one 1x16 splitter will be necessary.

DESCRIPTION AND TYPES OF ELEMENTS

 

The modules described before will be independent modules that will allow the installation of them in stack manner depending on the building requirements. At the initial deployment we will use the necessary “Building Modules” to cover the 100% of dwellings. We must reserve space for the installation of minimum two “Operators Modules”, despite only one of them will be installed at the initial deployment.

As a general rule, the “Building Module” will be installed at upper positions and the “Operator Module” will be installed below. All modules must provide the necessary elements for a proper wall installation.

As a special case we consider the initial installation of a single “Operator Module” when using drop cables on demand. If any other operator wants to supply services in that building then the new operator must install its “Operator Module” above the first one. The drop cables of the first operator will come out the module from the bottom, and the drop cables of the second operator will come out the module from the top.

Each module consists in an envelope and a fiber managing and routing system for passive elements. Rectangular shape allowing a perfect coupling between modules without gaps.

Each module has two separated areas: left side for building cables termination (in case of “Building Module”) or for feeder cables termination, optical splitters housing and point-to-point circuit managing (in case of “Operator Module”), right side for patchcord routing and managing to interconnect the two types of modules.

Each module area must have an independent door, one for the left side and one for the right side. The lock system must use a triangular key.

The left access door must have frontal opening using a hinge situated at the lower side of the door. The door must use a restraint method to block the door at 90º opening angle and 180º opening angle. The restraint method element must be strong enough to manipulate elements above the door opened at 90º and must prevent accidental openings. Above this door, the splice trays will be placed.

The right access door must have a side opening method from left to right. The door must be double hinged; one hinge on the front side and one hinge on the rear side of the door, that fact allow front and side access to the right module area.

CABLE ACCESS AND FIBER/BUFFER ROUTING

The multifiber cable access (riser or feeder cable) must be done through the left-low side of each module. Inside the module there will be the proper and necessary elements to fix the cables correctly.

On the left side of the module there will be an access aperture for pass through cables inlet.

The cables must be fixed over a sliding tray where the cable’s cover will be fixed and the Kevlar will be retained as well. The fixing elements must be independent for each cable accessing to the module.

The cable’s cover will be retained by using two press bars, the press bars will be tighten by screws. The next image shows an example of the design required

The sliding tray must be able for being inserted through the side access aperture, that fact allows the buffer storage of straight trough cables, the storage can be easily realized outside the module.

The sliding tray must have some flanges to retain and route the straight through buffers of the feeder cables.

The following picture shows an example of the design required:

Placed at the bottom of the module, there will be some fiber routing elements for 900um pigtail routing or splitter’s outputs routing.

SPLICE TRAYS

The splice trays will be placed over the left door of each module. See ANNEX 1 for splice tray design. Each module contains 6 splice trays numbered from 1 to 6 at their side (lower=1, upper=6) Tray capacity is 8 splice protective sleeve (length=45 mm, diam=2,6 mm) or 16 splice protective sleeves using double layer.

The position of the trays must leave a 2cm gap between the tray #1 and the door. This 2cm gap will be used to store the excess fiber or buffers, and to ease the installation of fibers. In addition, more fiber routing elements will be placed over the door on the left side and on the central side, near to the door hinge.

The next image shows the place of the suggested items:

1, 2 and 3: flanges for straight trough buffer retention

10, 11, 12 and 13: routing elements for 900um pigtails or splitter’s outputs towards the patch panel

14 and 15: routing elements for splitter’s input and pigtails towards the splicing trays

7, 8 and 9: routing elements for cable buffers and microbundles towards the splicing trays (placed under the splicing trays).

4, 5, 6, 16, 17, 18: routing elements for cable buffers, pigtails, microbundles and splitter’s inputs from the envelope’s base towards the splicing trays

PATCH PANEL

The patch panel of each module must be placed dividing the left and the right side of the module. There will be installed the SC/APC adapters placed at six rows of 8 adapters per row (6x8=48 adapters).

The patch panel will be pivoting, with its pivoting axis at the bottom of the module. Its usual position will be at 15º from the perpendicular direction. It will be pivoted from left to right (looking form the front of the module). When the patch panel is rotating, there must be some stop mechanism to prevent from damage the connectors and prevent unwanted pacthcord curvatures.

Caja MultiOperador 48 puertos SCLCd

Caja MultiOperador 48 puertos SCLCd

The opening of the patch panel could be done at the first installation to ease the installation of cables, pigtails and optical splitters. Once the first installation is finished, the patch panel returns to its original position (15º from perpendicular direction) and will remain untouched for the rest of operations at the module.

A label will be put on the rear side of the right door, the label contains information about the identity of each one of the positions at the patch panel: position #1 = upper-inner position (far from door), position #48 = lower-external position (near to door). Each position marked with numbers from 1 to 48.

Next image shows different areas and elements of the module:

Patch panel labelling Label

The modules will be able to open, close and reopen when needed without interfere any optical active circuit. Similarly, element update operations and client registration won’t interfere any optical active circuit previously established.

The right area of each module, reserved for patchcord routing and patching between modules, must present two separate removable roof and floor in order to permit the pass of patchcords between modules. The roof or floor of the modules installed will be removed progressively depending on the necessities and the number of modules used. The roof of the upper module and the floor of the lower module will always remain installed to prevent from dust or liquid entrance to the whole multi-module. The modules will be provided with the elements for routing the patchcords between modules, keeping the minimum curvature radius of 20 mm.

BUILDING MODULE

Each module has two areas with independent doors, like it was explained before.

The left area will be accessed by the building distribution network cables, the fibres of these cables will be spliced with SC/APC pigtails. The connectors of the pigtails will be connected to the patch panel.

The right area is reserved for the patchcord routing and connection. These patchcords will connect the “Building Module” patch panel with the “Operator Module” patch panel.

The access of the building distribution network cables will be done trough the left side of the module. The minimum number of riser distribution cables is 3 (riser cable diameter is 8mm).

In case of use more than 3 riser cables, the module can dispose an additional inlet or allow 2 riser cables entrance by using a single inlet port (using double seal)

The left area of the module contains the fiber manage and routing system formed by all the necessary elements to route and store fibers, buffers, pigtails, splices and connectors. These elements are:

Fixation elements for riser distribution cables. Elements able to fix the cable cover and Kevlar yarns.

Fiber routing elements. From the buffers towards the splice trays, minimum curvature radius allowed is 20 mm.

Universal splice trays. See ANNEX 1. The trays will house the splice between the fiber from the riser cable and the 900um SC/APC pigtail.

Patch panel. For connecting the SC/APC pigtails and patchcords.

Pigtail routing elements. Minimum curvature radius allowed is 20 mm.

The splice trays will be installed over the left side door using a tray bracket fixed by using screws. The tray system has two parts: the tray bracket and 6 trays. The tray bracket is fixed over the door and consists of two symmetrical elements to hold the trays(什么意思), these trays must be hinged from its horizontal position (0º) to its vertical position (90º).

The trays hold spliced fibers and have rectangular shape. The trays must have a stop and block system at 0º and 90º positions. The tray includes a splice chip and a fiber storage wheel. The trays have some holes to allow the fiber fixation by using tie wraps. The splice chip must be single layer (up to 8 splice protective sleeves) and double layer (up to 16 splice protective sleeves). Common protective sleeve: length=45 mm, diameter=2.6 mm.

As a general rule, the riser cable fibers will be routed to the splice trays, and then spliced with SC/APC pigtails. The SC/APC pigtails will be routed to the patch panel (left side of patch panel).

The following picture shows the fiber routing and managing system designed:

NOTE: Dotted lines indicate the buffers routed below the splice tray system.

OPERATOR MODULE

Each module has two areas with independent doors, like it was explained before.

The left area will be accessed by the operator feeder cables. The right area is reserved for the patchcord routing and connection. These patchcords will connect the “Operator Module” patch panel with the “Building Module” patch panel.

The access of the operator feeder cables will be done trough the left side of the module. The minimum number of feeder cables is 3 (feeder cable nominal diameter is 16mm, number of fibers is 64 per cable). The module must allow straight trough cables.

The left area of the module contains the fiber manage and routing system formed by all the necessary elements to route and store fibers, buffers, pigtails, splices, connectors and splitters. These elements are:

Fixation elements for feeder cables. Elements able to fix the cable cover and Kevlar yarns.

Fixation elements for feeder cable buffers. Buffer diameter=2.5mm

Buffer storage elements: maximum is 7 buffers with diameter 2.5mm and length 2m.

Fiber storage elements: for excess fibers and straight trough fibers.

Buffer routing elements. Route the buffers towards the splice trays, minimum curvature radius allowed is 30 mm.

Universal splice trays. See ANNEX 1. The trays will house the splice between the fiber from the feeder cable and splitter’s input or between the fiber from the feeder cable and the 900um SC/APC pigtail (in case of point-to-point circuits).

Patch panel. For connecting the SC/APC pigtails or the SC/APC splitter outputs and patchcords.

Optical splitter bracket. The bracket will hold up to three 1x16 SC/APC optical splitters. The splitter outputs will be 1.8mm diameter with connectors. Splitter outputs length is 50cm

Pigtail routing and store elements. Minimum curvature radius allowed is 20 mm.

The cable access system is on the left side of the module. The feeder cable used is PKP with maximum 64 fibers, up to 3 inlet ports. The cable fixing elements and buffer storage area will be disposed at the lower-left side of the module. The cable access system must be able for being removed from the module to ease the cable installation outside the module and then inserted within the module.

The splice trays will be installed over the left side door using a tray bracket fixed by using screws. The tray system has two parts: the tray bracket and 6 trays. The tray bracket is fixed over the door and consists of two symmetrical elements to hold the trays, these trays must be hinged from its horizontal position (0º) to its vertical position (90º).

The trays hold spliced fibers and have rectangular shape. The trays must have a stop and block system at 0º and 90º positions. The tray includes a splice chip and a fiber storage wheel. The trays have some holes to allow the fiber fixation by using tie wraps. The splice chip must be single layer (up to 8 splice protective sleeves) and double layer (up to 16 splice protective sleeves). Common protective sleeve: length=45 mm, diameter=2.6 mm.

The feeder cable fibers used in the module (fibers to be spliced with splitter’s inputs or p2p pigtails) will be stored at the splice trays. The rest of the feeder cable fibers will remain unused and stored at the buffer storage elements or at the splice trays.

Fibers from the operator feeder cable will be routed towards the splice trays and spliced with splitter inputs or with SC/APC pigtails (p2p case). 2 trays will be used for that purpose, the rest of trays could be used for extra splices.

The optical splitters will be hold inside a bracket disposed at the upper-left side of the module, near to module top. The bracket consists of 3 independent spaces, each space for a single splitter. The element has straps to ensure the correct positioning and fixation of each splitter. Each splitter position must be labelled, upper position = #1 and lower position = #3.

The bottom of the module will hold all the necessary elements for splitter output and pigtail routing and storage. The bracket will hold up to three 1x16 optical splitters. See ANNEX 2 for splitter specifications (ERQ.f6.0231).

The SC/APC splitter outputs will be routed towards the patch panel. Outputs 1 to 16 of splitter#1 connected to 1-16 patch panel positions, outputs 1 to 16 of splitter#2 connected to 17-32 patch panel positions and outputs 1 to 16 of splitter#3 connected to 33-48 patch panel positions.

The following image shows the fiber routing and managing system designed:

CLIENT REGISTER

When a client is registered into the FTTH operator’s manage system, then the installer will connect the client fiber (from the building distribution network) with the operator fiber (from a splitter output or p2p circuit), the installer only has to connect the appropriate patchcord to the correct patch panel positions.

The patchcord used is 2.4mm diameter G.657AB with SC/APC at both ends. The patchcord length will allow the connection of each position of the “Building Module” patch panel with any position of the “Operator Module” patch panel. For adjacent modules the patchcord length must be 60cm (major lengths will be considered in case of using more than 2 modules). On the right side of the modules, there must be the necessary elements (routing clips, storage elements or similar) to allow the perfect routing of the patchcords between any module and to allow the storage of patchcord’s excess length (minimum curvature radius = 20mm).

When a second “operator module” is installed, the routing of the patchcords from the operator’s patch panel towards the building’s patch panel will be made through the right area of the first “operator module”.

The following images show the routing elements:

MATERIALS

 

Module envelope and doors made of plastic UL 94 V0. Any other type of material can be suggested.

All metal parts will be corrosion resistant.

All materials must be no toxic and dermatologically reliable.

DIMENSIONS AND ASPECT

 

The recommended dimensions are:

“Building Module” for max 48 adapters:

450 x 180 x 150 mm (wide x high x deep). Right area of the module limited to 150 mm width.

“Operator Module”:

450 x 180 x 150 mm (wide x high x deep). Right area of the module limited to 150 mm width.

FUNCTIONAL REQUIREMENTS

 

COLD

Test made to the whole set. Normative IEC 60068-2-1 part 2, test Ab.

Temperature = –5º C +/- 3º C. Time = 96 hours. Visual inspection at the end of test to ensure no damage is found at any element.

DRY HEAT

Test made to the whole set. Normative IEC 60068-2-2 part 2, test Bb

Temperature = +60º C +/- 2º C. Time = 96 hours. Visual inspection at the end of test to ensure no damage is found at any element.

THERMAL CICLES

Test made to the whole set. 10 climatic cycles, 8 hours per cycle. Normative IEC 60068-2-14, test Nb with the following specifications:

2h testing at 60 +/- 2º C.

2h transition from 60 +/- 2º C to –5 +/- 2º C.

2h testing at -5  +/- 2º C.

2h transition from –5 +/- 2º C to 60 +/- 2º C.

Initial transition time from room temperature to 60 +/- 2º C is 1 hour.

After the 10 cycles, visual inspection to ensure no damage or deformity is found at any element.

HUMIDITY CICLES

Test made to the whole set. Normative IEC 60068-2-38. Time = 4 days.

Visual inspection at the end of test to ensure no damage or deformity is found at any element.

SALT SPRAY

Test made to the whole set. Normative CEI 60068-2-11, Ka test during 48 hours. No corrosion must be observed at any element.

FIRETEST

Test made to the plastic materials. Normative UL 94 VO, the materials must satisfy the normative.

MECHANICAL RESISTANCE

Test made to a module. Set the temperature to 0º. The test consists of dropping a 1kg steel sphere from 0.5m high over the centre of the box envelope, the box will be at horizontal position, fixed to the floor and with doors closed. Visual inspection at the end of test to ensure no damage or deformity is found at the material.

DUST AND LIQUID TEST

Test made to a module fixed on the wall as usual way. Normative EN 60529, the required IP grade is 5X.

IMPACT

Test made to a module fixed on the wall as usual way. Normative EN 50102, the required IK grade is 08

STATIC CHARGE

Normative IEC 61300-2-10

Test made to a module fixed on a plain surface. Put a 100kg static charge over the centre of the module, uniformly distributed over a 25 cm2 surface.

Time applying charge: 10 minutes.

Visual inspection at the end of test to ensure no damage or deformity is found at the material.

REOPEN TEST

The module will suffer 500 open and close operations, no damage or deformity must be found at the materials.

RELIABILITY

Minimum 20 years for all materials and pieces.

SUPPLY CONDITIONS

 

Each module must be supplied with the following elements (in addition to the elements described before):

Fixing elements for the access of cables. Each cable access port must have a plug or seal.

Splitters bracket for the “Operator Module”.

Trays bracket + 6 splice trays + Velcro ribbon to tie the trays.

Additional supply elements:

Screws and plugs for wall mounting.

Template for marking the drill positions to install 2 modules on the wall.

24 tie wraps 2,5x100 mm

Triangular key

Foam ribbon (5 strips 15x200 mm)

Installation Manual.

Double seal for riser cable.

Only for “Building Module”, supply material:

16 SC/APC adaptors at patch panel positions 1-16.

Rest of patch panel positions equipped with a blind plug.

16 pigtails (900um, 2 m length, SC/APC, semi-loose buffer, easy strip)

Only for “Operator Module”, supply material: 1-16 patch panel positions are free, the rest of positions are with a blind plug.

ANNEX 1: SPLICE TRAY

The splice trays will be installed over the left side door of the modules using a tray bracket fixed by using screws.

The trays hold spliced fibers and have rectangular shape. The trays must have a stop and block system at 0º and 90º positions. The tray includes a splice chip and a fiber storage wheel. The trays have some holes to allow the fiber fixation by using tie wraps. The splice chip must be single layer (up to 8 splice protective sleeves) and double layer (up to 16 splice protective sleeves). Common protective sleeve: length=45 mm, diameter=2.6 mm.

The following image shows the suggested design:

ANNEX 2: OPTICAL SPLITTER SPECIFICATIONS

The splitter used for the modules is 1x16 type.

The splitter must be installed and protected into a 100 x 45 x 10 mm cassette.

Splitter outputs and input must be a mono-fiber cable (1,8 mm diameter). The outputs will be assembled with a SC/APC connector.

Input fiber length is 2,5m. Output fibers length are the length enough for connecting the splitter outputs to any position of the module’s patch panel.

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