Guide Lines for GPON Planning

1. Overview

The twenty-first century heralded countless changes in the telecommunications means to deliver services to residential and business consumers. The phenomenon is underpinned by two technologies: Internet protocol (IP) and optical fiber. The technology provides triple play (viz) voice, video, and data services over a common protocol—IP. Operators are quickly moving to maximize the number of services offered to a single customer via a bundled offering. Technologies such as voice over IP (VoIP), IP television (IPTV), and broadband will become a common requirement.

As bundled services and technologies are deployed, the legacy networks, designed to efficiently deliver a single service, are stressed and in many cases incapable of offering the desired services. The telecommunications has matured to offer network convergence and enable the revolution of consumer media device interaction. The aging copper access infrastructure in residential and business locations is unable to meet the demand of increase in bandwidth, for several applications. These demands can only be met by the deeper penetration of optical fiber in access networks and increasing deployment of fiber-to-the-home (FTTH). As a result, FTTH is the fastest-growing global broadband technology, with significant deployments

1.1 Bandwidth Demand

Operators will need capability of delivering more than 40 Mbps per tenants, over the next few years, as multiple services are used in the home, high-definition TV (HDTV) becomes more prevalent, and users demand faster Internet connections. Hence the need to deploy more single-mode optical fiber, deeper in the access networks, has become a necessity. Such a fibre deployment shall meet the high bandwidth requirements of customers, ensure the network future proof, maximizes the symmetrical bandwidth throughput of a carrier’s access network, provide network reliability, reduce operating expenses and will enhance the revenue opportunities. The industry refers to this technology as Fibre to Home (FTTH).

1.2 Introduction – GPON

The Gigabit-capable Passive Optical Network (GPON) family of specifications has been released by the International Telecommunication Union (ITU) in the ITU-T G-984.x series of documents starting from 2003. GPON technology is not backward compatible to APON or BPON. An alternative technology has been specified by the North American IEEE based on Ethernet and thus named Ethernet PON (EPON) or Gigabit Ethernet PON (GEPON). The corresponding standard is IEEE 803.2ah. EPON and GEPON are not compatible.

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OLT1:n

ONU

ONU

ONU

ONU

PassiveOptical Splitter

Central Off iceCustomer Premises

OLT1:n

ONT

ONT

ONT

ONT

PassiveOptical Splitter

Customer Premises

Fig.1 (Principle layout of passive optical network)

All PON technologies are based on the same principal layout of a passive optical network as shown in the figure above. A number of terminals at the customer side communicate with the same port of the Optical Line Terminal (OLT) in the central office. The full bandwidth of this port is shared between the connected Optical Network Terminals (ONTs).

ONTs can be designed for single or multiple user CPE deployment. ONTs are available for indoor and outdoor installation. However in Etisalat, only indoor type shall be deployed. ONTs can be located directly in the customer premises.

GPON can be operated on 1 or 2 fibers, symmetrical or asymmetrical. Up to 7 combinations of upstream and downstream transmission rates are possible, of which the highest are 2.5 Gbit/s and 1.25 Gbit/s.

Etisalat and many other operators favored 2.5 Gbit/s for downstream and 1.25 Gbit/s for upstream transmission in order to be most future-proof. The single fiber GPON operates on different wavelengths for upstream and downstream directions:

upstream: 1260 nm – 1360 nm downstream 1480 nm – 1500 nm

Parameter categoryDownstream 2.5 Gbit/s nominalUpstream 1.25 Gbit/s nominal

All specified parameters are in accordance with ITU-T Rec. G.984.2.

1.3 Over View of FTTH Outside Plant (OSP) Components

A wide array of outside plant components are used to build FTTH networksAll FTTH networks inherently are designed to deliver an optical fiber to the subscriber. However, their design is highly dependent on the unique nature of the access environment, so product and design flexibility is critical.

In short, at the core, FTTH networks contain an optical line terminal (OLT), optical cable, and optical network terminal (ONT).The OLT is typically at the CO but can also be sited in a remote location. The OLT houses the laser transmitters dedicated to each user in a PTP (Point to point) network or shared across several users in a PON. The OLT is also the aggregation point for voice network, data, and video.

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The optical fiber carries the signal to the user and is divided into three sections: main cable (terminated at the CO), distribution cable (fanning out across the access network and connect to the Main cable “feeds”), and drop cable (used to physically connect the users to the Distribution cable). As a medium, optical fiber’s bandwidth is only limited by the transmitters of the OLT and hence future-proofs the access network because of its tremendous bandwidth capacity.

The ONT receives the signal from the OLT and converts into usable electronic signals for the user’s telephone, computer, TV, or other devices. The ONT also serves to communicate IP traffic back to the OLT, such that voice conversations can occur, Web pages can be requested, and TV channels can be changed, all at the same time. Typically, the ONT can be connected to a battery backup device, providing a limited time period (typically eight hours standby) of lifeline services.

1.3.1 Typical PON Components

The aggregation of splitters is typically, either in a street cabinet or in the ODF, installed in the Telecom Room. This is the convergence point between main cable and distribution cable network. From the splitter, a dedicated fiber is assigned to each customer. These dedicated fibre to each customer, may have to snake its way into the neighborhoods in the distribution cable then to a Drop cable closures, sited close to group villas, in the Joint box. From the drop cable closure, drop cables, usually containing two fibers, are laid directly, to the subscriber’s ONT box.

Drop cable closures – Joint box type

These are designed to accommodate a single cable entry with multiples of drop cable out let. A single fiber is spliced through, in the closure, to reduce the size of distribution cable to the street cabinet.

Drop cables

Different types drop cables are available for Indoor and out door application and in different sizes. In new buildings, the owners are expected to pre-wire the buildings with the indoor type 2 F drop cables These cables are very compact and has bending radius 15 mm.

Initially Etisalat may stock these types of cables, to meet the builder’s requirement, for reasons of fiber compatibility. End users shall be encouraged to procure these from the market.

Express Field connectors – SC/APC

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These are primarily indented for drop cables terminations to the customer premises ONT. The use of these types of connectors, require the technician to spend only few minutes inside the customer premises. These connectors are environmentally hardened field connectors and recommended only for the customer premises location.

Micro ODF

These are miniature ODFs and can be installed in the wall or inside ONT Box, where a single fiber out of the 2F drop cables can be terminated with the Express connectors. The location of the Micro ODFs are to be adjacent to the ONT These are a essential hardware, to pre terminate the fibre and testing the fibre, as the installation of ONT may be on demand basis.

No joints are recommended on the drop cables

Fiber characteristics

Etisalat deploys standard fiber cable according to ITU-T G.652, Single-modeModified diameter:…………..8.6 µmCladding diameter:…………..125 ± 0.1 µmCable size:…………………...3.1 X 2.9 mmCable weight:………………...8 Kg/KmTensile strength:……………...Not exceeding 80 NBending radius:………………Not exceed 20 mm Wavelength:…………… ……1310 nm …...max. 0.4 dB/Km ……… … ………1550 nm .......max. 0.3 dB/Km

Splicing of fibers

Splicing of Fibres is recommended, instead of the mechanical connectors in ODFs in the central Office, cabinet and Cable joints as the fusion splice loss is 0.01 db only. However, Express connectors may be considered if the fiber loss budget is not exceeded.

Fiber Terminations

In general, the UG cables / fibers shall be terminated in the lower Uniracks of the ODFs. The Splitter Uniracks may be installed above the Uni rack of the UG termination. The in Building Drop cables shall be terminated, at the upper levels.

In the Central Office, if the number of fiber terminations is high, dedicated ODFs may be assigned for UG cable termination and dedicated ODFs for splitter. This arrangement will provide the flexibility to recover the splitters and put through the fibres direct, to meet the higher band width requirements.

1.4 Network Architecture - FTTH

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The FTTH is simply the 100 percent deployment of optical fiber in the access network. It is commonly deployed in two specific configurations, as below

Point-to point. (PTP) network - Fiber is dedicated to each user in the access network. Refer to Figure.2

Passive optical network (PON) - A single fiber is shared (via a splitter) among a set number of users, typically thirty-two.

PTP networks are characterized by the use of one fiber and laser per user. A dedicated fiber is terminated at the subscriber and active devices at the central office (CO) for a telecommunications provider.

PONs are characterized by the “splitting” of the same optical fiber along the way, resulting in the sharing of the optical fiber among multiple users The fiber in a PON is designed to share between 2 to 128 users, depending upon the availability of splitters. .

A PON will have less optical reach than a PTP network, which does not use splitters. Typically a PON is capable of reaching subscribers 20 kilometers (km) from the OLT, which will cover most of the population.

GPON promises 2.5/1.25 Gbps asymmetrical operation. GPON supports ATM, Ethernet and WDM using a superset multi-protocol layer.

GPON requires supporting a multiple protocols through translation to the native Generic Encapsulation Method (GEM) transport layer that through emulation provides support for ATM, Ethernet and WDM protocols.

The important characteristics of each PON technology are defined by two important standards bodies, the IEEE and the ITU.

Central Office

Feeder FiberDistribution Fiber

Dedicated Fiber to each home

Central Office

Feeder FiberDistribution Fiber

Dedicated Fiber to each home

Fig.2 (Point to point (PTP) network)

2. Design of GPON Network (Refer to Fig-3 – GPON Network)

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2.1 The objective is to develop a network, capable to deliver 100 Mbps per each tenant. To optimize the size of network and corresponding investment to match with the demand, the line plant shall be developed, meeting the ultimate requirements.

2.2 The initial capability of delivery of the network shall be 40 Mbps, with 1:2 splitters in the central office and 1:32 at the remote end.

2.3 GPON Architecture: Network deployment & distribution architecture should enable us to provide any single service to the customer from our portfolio or 2-play / 3-play service bundles to the customers.

2.4 The following criteria's have been considered in the development of the OSP design of planning guidelines:

Scalable network Deployment of technically matured products Economical component prices Reduction in CAPEX and OPEX Ease to install, maintain and operate Quick to restore the service Minimum splice to extend reach Design FO network within 28 dB loss budget, end to end Centralized splitters Preconnectorised splitters Splitter ratio 1:2 in CO and 1:32 in remote Induction of 2F drop cables in Indoor and Outdoor SC/APC Connectivity Express SC/APC connectors drop cables Use of existing cabinet and or locations as splitter cabinet Distribution cables to be loose tube 8F/16F/24F, from Outdoor

splitter cabinet Induction of UG drop cable closure, in Joint Box Splice through 1F, in the drop closures Termination of single fibers in ONT and ODF / Splitter (FDH) Cabinet

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Fig-3 – (GPON Network)

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G.PON SOLUTION SALIENT FEATURES

HUAWEI ALCATEL

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Rack for Indoor Central Office

Dimensions ( D x W x H) 300 D x 600 W x 2200 H 310 D x 610 W X 2200 H

Power Distribution Unit (PDU) W/ M+SB Feeds

YES YES

Power Redundancy YES YES

No. of Chassis/ Rack 3 2 shelf per rack

Back to back Installation YES YES

OLT

CHASSIS 530 mm × 275.80 mm × 450 mm (W x D x H).

637.5mm(H) X 515mm ( W) X 285mm (D)

CPU SW redundancy YES YES

Operating Temperature temp -5 to + 45C -5 to 50 degree

Dual Power Feed YES YesFans YES Yes

Alarm Indication YES Yes

Single Architecture Integrating ATM.IP, TDM

YES

Total Backplace capacity 184G 96GE switching fabric

Backplance Capacity 1 T 28GE interface capacityAvailable Slots GPON Access Modules

16 16

TOTAL ONT Supported/ Chassis2048 ONT's (16X 2 X

64)2048 ONT's ( 16 X 2 X 64 )

GPON Interface

Optical Power Budget 28dB 28dB

GPON Ports/ GPON Card 4 4

Connector type of PON Interface Access Side

SC/APC SC/UPC

Single/Dual Fiber Both Single fiber

Network Side Interface

GBE YES YES

10GBE YES YES

No of OLT Interface Network Side

8* GE or FE uplink and cascading

2 x 10 GE redundant mode2* 10GE uplink and

cascadingRedundancy YES YESONT

TypeIndoor

Residential/BusinessResidential

Outdoor/IndoorPOTS 2 / 2 2 / 2FE 4 FE / 4 FE 1 FE / 2 FEE1 - / 4 E1 - / -Power AC / AC (AC-DC) / (AC-DC)

Table-1 (GPON Features)

3. Central Office (CO) Characteristics

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3.1 The Central Office (CO) houses the OLT and the ODF. The ODF room shall be selected such that to install ultimate feeder fiber capacity. An ODF extension into a second room shall be avoided at all circumstances; better shall not be allowed.

3.2 Within the CO, flexibility is the key. An optical distribution network should never be built for a single application. The ODF shall feature all functions for excellent flexibility including cross-connect and cable and jumper fiber management, particularly bend radius protection.

3.3 MDF room/or standard Cable chamber is not required for FO cables. Similarly; no Iron works are required. Use of standard cable Brackets and channels to support the cables. The end of lead-in should be placed such that the incoming Cable is possible to be routed to the cable brackets.

3.4 OLT is installed in the Central Office; in standard 19" ETSI Rack with front access for fibre termination The OLT has 2 or 3 sub racks. Each Sub-Rack supports 16 GPON cards. Each card has four ports. These are active equipments each capable to deliver 2.5 Gbps downstream and 1.25 Gbps upstream. The laser at the OLT is a distributed-feedback laser, and is always on.

3.5 The extent of service reach is 20 Km radius, which fully takes advantage of the long-distance coverage. Etisalat may aim to consider only 15 KM end to end. However, today with the available components the reach is limited to 12.5 Km only.

3.6 To extend the reach of GPON, the split ratio to be reduced to 1:32 bypassing the (1:2) splitter at the CO.

3.7 For the point to point architecture, is capable of delivering 2.5 Gbps through a direct single fiber to the customer.

3.8 In the case of point to multi point, the final delivery of bandwidth at the customer end depends upon the total number of splits along the route.

3.9 CO surround tenants within 500 M can be served from CO building itself instead of installing outdoor cabinets-FDH(O) in the vicinity, if the lead-in ducts and the space are available in the CO.

3.10 OLT (CO) Location Selection Criteria are:

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Router Location (OLT & Router are Preferred to be in the same location), wherever possible.

Ideally placed in High density areaThe proposed Central Office building shall be (new, or recent building

i.e. not marked for demolishing, space should be available for the ODF).

Duct space availabilityAim to serve 15 Km cable distance.FO Junction route/cable availabilityNo Overlapping: OLTs to be considered for all Exchanges, avoiding

overlaps of serving areas, as much as possible.

3.11 The following scenarios may be considered while selecting the OLT Location [ Refer to Fig.4 below: CO location ]:

1. Utilize the existing AN cable (if available) to serve any new site by deploying the FDH within the CO Old Boundary.

2. Extend the CO AN network outside the old boundary to serve any new area by FDH deployment within the CO Boundary.

3. Existing Copper/Fiber Cabinet in another exchange area: FDH Change over to be considered by utilizing the existing junction cable/route. For changeover, jointing in the Zero Manhole of the exchange to be considered (without any ODF Termination).

4. Serve any new sites by utilizing the junction cable passing from the zero manhole to the adjacent area and where required by laying additional fiber optic cable to the FDH to serve the area, within the exchange boundary.

5. Serve any new sites by utilizing the junction cable passing from the zero manhole to the adjacent area and where required by laying additional fiber optic cable to the FDH to serve the area, outside the exchange boundary.

6&7. Utilize the junction cable wherever possible to serve any new

areas near the Central Office Exchange.

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Fig-4 (Central Office Location-Example)

4. Optical Passive Splitter

4.1 Multiples of Optical Splitter (1:2) are proposed to be installed in a single stand alone 1U Uni Rack module, placed in the Central Office, simplifies the future upgrade and is scalable, for higher band width delivery. Typical insertion loss is 3.7 dB (max). Insertion loss uniformity is 0.6 dB. The size is about 3.6 mm dia X 48 mm long.

4.2 To increase the bandwidth from (40 Mbps) to (80 Mbps), the (1:2) splitter in the CO shall be bypassed and connected to OLT-port direct.

4.3 Optical Splitter (1:32) is a stand alone I U UniRack unit. with all ports pre conectorised. These can be installed in an Indoor ODF (in the Telecom Room of the High Rise Building or in the outdoor Cabinet to serve Villas & Small Buildings. These are suitable for installation in the standard 19” ETSI rack. Typical insertion loss is 17.2 dB. Insertion loss uniformity is 1.7 dB. The size is about 7L X 6W X 60H mm.

4.4 The Optical Splitter (2:32) is still not a matured product. The loss today is 18.6 dB.

4.5 Definition of high rise buildings is a structure, where direct fiber enters to the buildings, ie splitter inside the building.

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Central Office Boundary

1

2

CO

JB

JB

JB

Zero Manhole

Zero Manhole

Zero Manhole

Zero Manhole

Zero Manhole

Central Office old boundary

Exchange boundary

New Area within 15Km

New Area within 15Km

Junction Cable

Junction Cable

Junction Cable

AN Cable

AN Cable JB

AN Cable

AN Cable

Exchange boundary

FDH

FDH

FDH

FDH

FDHJB

JBFDH

3

4

5

6

7

12

4.6 Definition of small buildings & Villas is a group of small buildings or group of villas where external cabinets with splitters inside the cabinets shall serve the group of buildings and villas.

4.7 In the residential area, villas types, Optical Splitter (1:32) Uni Rack unit is recommended to be placed in Outdoor Cabinet, nearer to Customers, to minimize the length of the distribution cables, to simplify the construction process and to save expense. Please refer to Figure-10.

4.8 For up to G+3 / 5 storey buildings (Scenario I), a Wall mounted splitter unit, is suitable for in-buildings installation, where the number of tenants is less than 32 customers. The unit has a splice tray for the incoming UG cable, a 1:32 pre connectorised Splitter ports, and provision to terminate 32 Drop cables. This has also SC/APC Connectivity. Please refer to Figure-12.

4.9 For small buildings (Scenario II), where the numbers of tenants are far less than 32 customers, these may be served from an Outdoor FDH Cabinet as shown in Fig-13.

4.10 The formula to arrive at the total No of splitter Required per cabinet area = 5th year Tenancy Forecast divided by 32, However Fiber Cables To be planned based on 20th year forecast, than 5th year forecast.

Advantage of Centralized Splitters

OLT EfficiencyNetwork Testing and Maintenance AbilitySplitter Signal Loss minimizationFlexibilityProtectionMinimizing the number of splitters

5. Diversity

5.1 Diversity to be customer specific and cost basis.

5.2 Where the diversity is required for a Palace, Airport, Sea port, Defense, VVIP, Police, Hospital, etc the fiber can be routed in two different routes at recharge cost. The OLT is typically at the CO but can also be sited in a remote location. The double input splitters to be considered as and when available.

5.3 To plan as a single ring topology, where diversity is required, for ease in design, construction, maintenance and operation, instead of Rings and sub-rings

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5.4 The feeder cable section from OLT to splitter can be protected by using (2:32) splitter and OLT port and feeder fiber should be doubled, leaving the shorter cable section (distribution cable from splitter to ONT) in star form and unprotected. Refer to Fig.5

OLT

LT(2)

LT(1)

1

ONT

LT(1)

ONT

LT(1)2 : N

n

feeder ring distribution star drop cable star

ODF Cabinet CPE

Fig.5 (Feeder Ring)

6. Fiber Optic Cable Development & Civil work

(Refer to Fig-6, 10, 11, 12, 13)

Green Field:

6.1 Considering the future F.O. based GPON technology and to cope with future prospective services demand, the network development shall be planned on fiber optic cable from the OLT in Central Office to the ONT in the Customer premises.

6.2 Fiber Optic Cables, Splitter Cabinet & civil (ducts, joint boxes, etc) shall be proposed in the most economical way.

6.3 The OSP fiber counts from the Central Office shall be of a suitable size, to ensure meeting the future capacity requirements.

6.4 An Overall contingency of 25% fibers, rounded to the nearest higher cable size shall be provisioned in the main cable to meet the unforeseen demand.

6.5 Fiber cables shall be planned, considering manhole, joint box section length and considering the drum length. The joints may please be planned in such a way the cable cut length returned shall not be less than 750 m.

6.6 The various main cable sizes and drum lengths available in the contract are listed under annexure.

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6.7 Requirements of direct fibres for business establishment are also to be considered, while sizing the main cables.

6.8 For GSM Sites, an 8F cable to be considered; deployed in Ring Route. Although cable size recommended is 8F, 4F to be considered from each side

6.9 The spare fibers available in the Junction Cable Network to be utilized to connect, OLTs in one exchange area and ONTs in the other Exchanges.

6.10 The duct network shall be considerably reduced and the corresponding joint box / manholes can also be reduced, as the number of FO cables that would be installed shall be far less than the legacy copper network.

6.11 Accordingly, the ducts shall be reduced to maximum 2W D54 and Joint Boxes up to JRC12. A joint box of size JRC14 and manholes be considered, only if the same cannot be avoided.

6.12 As for as possible the joints in the main cable, may not be planned to be operated frequently to divert or put through fibers. The main joint closures have 4 in ports and 4 out ports, which can be used for multiple dropping of distribution cables (upto 24F)

6.13 The loose tube joint closures are suitable upto 24F loose tube fibres. These have 2 entries on either side, total 4 entries.

6.14 The drop closures are recommended to be installed inside joint boxes, close to group of villas or as per site requirements. These have single entry on one side and 24+ outlets for drop cables.

6.15 Regions shall propose the joint location for maximum utilization of full drum length to avoid short cut lengths.

6.16 Target to deploy FTTH to be set Region wise and areas to be identified by the Regions.

6.17 To deploy FTTH in green areas and brown areas alike.

6.18 To continue with Fiber laying in all Green and Brown areas.

Brown Field:

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6.19 FTTH deployment in city centers areas may be given preference over remote areas.

6.20 To migrate all brown areas from legacy to FTTH in phases, and according to resources available in the Regions, over the next 3-5 year.

6.21 Fibers already laid for local networks shall be considered while developing the GPON network.

6.22 The spare fibers installed for CATV Network shall be used for the deployment of GPON network. CATV initial installations were 16F in two routes and later 8F in two routes. As there will no new CATV nodes installed, all spare fibers are available for FTTH network.

6.23 To prevent additional expenses in civil work, all infrastructures existing is proposed to be used as far as possible.

6.24 All the existing Outdoor FO cabinets, CATV Nodes and Copper cabinets, shall be checked to accommodate the splitters and other cables

6.25 While installing Fibers in the existing copper Cabinets, working lines and corresponding terminations may be preserved and recovered only on demand for induction of additional services/bundled services through GPON or any other technical reasons. This may warrant rearrangement of copper terminations, air blocks and recovery of few verticals.

6.26 Where there are no duct spaces available and the distances are short, fiber may be shared along with the existing copper cables, if possible through a sub duct.

Fig-6 (Green & Brown Fields)

7. Distribution cables & Drop cables (Refer to Fig-7, Fig-8 & Fig-9)

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Brown Field

Green Field

Proposed Fiber

16

Warehouses

Outdoor FDH Cabinet

Existing Copper

7.1 From the splitter 1:32 located in the Outdoor F O Cabinet location, distribution cable (loose tube) sizes 24F, 16F and 8F combinations may be considered, depending upon the grouping of villas, number and locations.

7.2 The drop cables are 2F construction. The closures are capable of accommodation 12/24 drop cables. In the Villas & Small Buildings where the outdoor cabinet FDH(O) to be deployed; distribution cable (Loose tube) may be considered as outgoing cables. It is recommended that one fiber of the drop cable should be spliced through in the loose tube cable, so that one fiber is through to the splitter location and the other one shall be stumped (inside the closure).

7.3 For the Overhead distribution, the scenario generally remains the same, as the cable distributions are from a cabinet and the drop distribution from drop closures.

7.4 The drop cables shall be suitably labeled.

7.5 In the case of single villas, Etisalat shall extend and terminate the drop cable, in the Micro ODF in Green & brown Fields.

7.6 In Green Field the building owner shall install a minimum of 2 core fiber Drop Cables, from the main telecom room ODF Location to the ONT (Micro-ODF) of each Flat / premises. Installer has to leave an extra length of 3 M of cable on either end for terminations.

7.7 No splices are allowed between the Telecom Room and Flats.

7.8 All tenants shall be fiber enabled up to the Micro-ODF, near/inside the box of the proposed ONT (1 for operation and 1 for maintenance purposes)

7.9 Vendors to be encouraged to stock and sale to Builders In-building wiring hard wares.

8. Sizing of Main FO Cables and number of fiber calculation & Attenuation (See Table-2 & Table-3)

8.1 In general, every splitter requires a single fiber from OLT and a single fiber from the splitter to ONT.

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8.2 The life of the fibers is about 40 years and we should aim to provide cable network which will support all future demands. Further, the cost of fiber is comparatively, far less than the cost of the Duct space. Hence, it is recommended that the provision of the number of fibers may equal to at least 20 year tenants forecasted, unlike 3-6 years for E-side copper cable and 10 years for D-side copper cable.

8.3 The Table below to be used, to find the sizing of the main FO cable per cabinet. The provision of cable shall be based on 20th year tenants Forecast.

8.4 The total number of splitter requirement per cabinet shall be based on 5th year tenants forecast.

8.5 25% spare fibres shall be considered in the feeder cable size, for future requirements, maintenance, etc.

8.6 Number of Splitter per Cabinet = No of Tenants / Split Ratio (1:32)

8.7 From the above Equation, the total number of splitters can be used to identify the fiber cable size, maximum expansion and Remaining fiber as shown in table 1:

Fiber Calculation for Indoor / Outdoor Fiber Distribution Hub (FDH)

Number of Tenants Number of Splitters FO Cable Size

Required

Spare Fiber / Remaining Fiber

MinMax

ExpansionMin

Max Expansion

Max Min

32

192

1

6 8F

7F

2F64 2 6F96 3 5F

128 4 4F160

384

* 5

12 16F

11F

4F

192 * 6 10F224 7 9F256 8 8F288 9 7F320 10 6F352

576

** 11

18 24F

13F

6F

384 ** 12 12F416 13 11F448 14 10F480 15 9F512 16 8F

Table-2 (Fiber Calculation)

* Although 8F seems enough for the above mentioned tenants, but it is preferred to use 16F cable size, with respective to the future demand.** Same can be applied for min number of splitter (11&12), preferred to use 24F.

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8.8 The following Parameters should be taken into account while calculation the dB budget loss of the network.

ATTENUATION ON FIBER (dB)

Wavelength 1260- 1650 nm Remarks

Location TypeLoss dB

Max

Exchange

1 Splitter 1:2 3.6

2 OLT Connector Loss 0.4

3 ODF Connector Loss 0.4

OSP

4 Splice Loss /splice 0.01

5 Cable Loss / km 0.35

6 Splitter 1:32 17.2

Cab/Bldg

7 Splitter 2:32 18.6

8 ODF Connector Loss 0.4

Sub Premises

9 Drop cable loss / km 0.35

10 Fast Connector Loss 0.4

11 ONT Connector Loss 0.4 Table-3 (dB Budget Loss)

8.9 The loss allowance has the same value both in the downstream and upstream direction.

9. ODF/Mini-ODF/Micro-ODF Installation and Termination

9.1 ODFs are standard 19" inch ETSI Rack and can accommodate multiples of Uni Rack of height 1U (4.44 cm) or 2U (8.88 cm) etc. these have varying termination capacities for FC and SC Connectivity. Usually installed in central office and in the telecom rooms of high rise building.

9.2 At present, these have 24 SC/APC ports per IU and 72 SC/ APC ports in 2U Uniracks. Efforts are being made to increase the number of ports per IU and 2U Uniracks.

9.3 For cross connecting the fibers between UG Cable (main Cable), Splitter output and Drop cables/Distribution cable, patch cords in different lengths and connectivities are available for use.

9.4 All ODFs supply, installation, termination and jumperings shall be by Etisalat for Green and Brown Fields.

9.5 Where the building has less than 32 customers, a wall mounted splitter FDH (indoor type) is more suitable. The unit will serves as a Mini-ODF with splitter assembly and facility to terminate drop cables. See Annex-4

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9.6 The drop fibers can be terminated in the Micro ODF near ONT with an Express connector.

9.7 In the existing building, Micro-ODF can be installed in the wall close to ONT.

9.8 In the new building, Micro-ODF can be installed inside the ONT Distribution Box recessed in the wall.

9.9 Battery life support for the ONT shall be left to the discretion of the Subscriber. Etisalat shall not under take the responsibility of installation and maintenance of these batteries.

10. Outdoor - Fiber Distribution HUB (FDH ) (Refer to Fig-6 & Fig-7)

10.1 The Outdoor Fiber Distribution Hub (FDH) provides for connections between fiber optic cables and passive optical splitters in the OSP environment.

10.2 The (FDH) utilize standard SC/APC to interconnect feeder and

distribution cables via 1:32 optical splitters and connectors.

10.3 The (FDH) is placed strategically in the FTTH network to facilitate service connection specified for a particular fiber serving area.

10.4 These (FDH) provide environmental and mechanical protection for cables, splices, connectors and passive optical splitters.

10.5 The FDH(O) capacity and requirements are attached in the annexure 3.

Fig-7 (Outdoor FDH & Cable Distribution - Example)

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1:32

24F

8F

SplitterFeeder Module Distribution Module

Drop Closure

Drop Closure

2Fx8

2Fx12

2Fx12

Pigtails

Patch Cord

Patch Cords

Pigtails 32 ONTs

Outdoor Fiber Distribution Hub (O/FDH) UG Joint Boxes with Drop Closure

Customers Premises

(Villas)

SC/APC Type Connectivity

in ODF

16F Loose Tube

Feeder cable

from CO

20

Drop Cables (1F working + 1F Dark)

Fig-8 (FO Drop Cables Distributions - Example)

11. Indoor- Fiber Distribution Hub (FDH) (Refer to Fig-9)

11.1 The indoor FDH is designed to organize and administer fiber optic cables and passive optical splitters in an indoor environment typically suitable for high rise buildings and are placed in the telecom Room.

11.2 These FDHs are used to inter connect main cables and drop cables via optical splitters in a FTTH network application, within a building environment.

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2F Drop Cables

Drop ClosuresOutdoor Fiber

Distribution Hub

Lead/in Joint Boxes

FO Drop Cables Distributions

Customer Premises

16F Cable 24F Cable 24F Cable

21

Fig-9 (Indoor FDH & Drop Cables Distribution - Example)

12. Villa/Flat ONT, Distribution box, SCS & Socket

12.1 The terminal at the subscriber's end of the network is the ONT or Optical Network terminal. The ONT has 2 pots port, 2 to 4 Ethernet ports. Currently we have two suppliers (viz) ALCATEL and HUAWEI. The number and type port varies as per type and model and brand. Please refer to attached data sheet (See Table-1) for details.

12.2 ONT is indoor type only and installed when service order is printed.

12.3 ONT policy: ONT is Etisalat property. And the services are provided to the customer through that ONT.

12.4 In green area, a cabinet flush mounted on wall shall be provided by the builders. The size of the cabinet shall be of minimum size 12 U high, 600mm width and 300mm depth which will house the Optical network termination (ONT), power sockets and patch panel / IDC modules and battery. The cabinet shall be dedicated per each villa/office/residential flat. The location shall be suitable for technician’s access, when required. Slimmer cabinets when available shall be advised.

12.5 The location of the Indoor ONT Distribution Box shall be at a common point, where all the internal conduits meet and the structured cabling system (SCS) on a star topology can be installed. However, the farthest socket shall not exceed 90 M from the ONT.

12.6 The Structured cables used for the inside wiring must comply with minimum CAT-6 standards.

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1:32

Splitter

Pigtails

Patch Cord

Patch Cords

32 Pigtails

Indoor Fiber Distribution Hub (I/FDH)

Riser

Customers Premises

(Flats)

SC/APC Type Connectivity

in ODF

Drop Cables (1F working + 1F Dark)

32xONTs2Fx32 Drop Cables

Feeder cable

from CO

16F Loose Tube

1F terminated & 1F Left in PC drawer

Feeder Module Drop Module

22

12.7 All SCS cables are to be properly labeled and terminated, in the RJ45 sockets and in Patch panel or in CAT-6 compliant IDC Modules, by the Owners for Green Field.

12.8 The supply and termination of UTP cables on Patch panel or IDC modules and sockets location shall be the responsibility of the installers/owners for Green Field.

12.9 Dedicated ‘In house’ or ‘Vendor Based’ Training for Planners, Technicians, Jointers, UTP wiring and termination technicians, Supervisors for contract works, NOC release planners and Building Inspectors to be arranged.

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Fig-10 (Cable to Villas Structure)

Fig-11 (Cable to High Rise Building Structure)

Fig-12 (Cable to Building Structure – Less than 32 Customers)

Fig-13 (Cable to Building Structure – Less than 32 Customers)

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Central Office

Outside Plant

Inside Villa

GPON Structure F.O. Cable Network to Villas

STB

N x RJ45 Socket

JB with DropClosure

Outdoor FDH Cabinet

Splitter (1:32) x N Cassette / Micro-ODFOLT

48F/1000F Ribbon

2F Drop Cable ONT

CAT-6ODF

8F/16F/24F Feeder Loose Tube

Joint Box

90m Max

8F/16 F / 24F DistributionLoose tube

1:2 Splitter

FO FO

SC/APC type Connectivity in ODFs

Central Office

Outside Plant

Inside Flat

GPON Structure F.O. Cable Network to High Rise Building

No. of card/Chassis = 16No. of Port/card = 4

No. of Customer (1:32) = 2,048No. of Customer (1:64) = 4,096

STB

N x RJ45 Socket

Indoor FDH Cabinet


48F/1000F Ribbon

2F Drop Cable

ONT

CAT-6ODF


Joint Box

90m Max

1:2 Splitter

FO FO


Telecom Room

Central Office

Outside Plant

Inside Flat

GPON Structure F.O. Cable Network to G+3/5 Building (Less than 32 Customers) – Scenario I



STB

N x RJ45 Socket

Indoor FDH Cabinet Wall Mounted Type

Splitter (1:32) Cassette / Micro-ODFOLT

48F/1000F Ribbon

2F Drop Cable

ONT

CAT-6ODF

8F Feeder Loose Tube

Joint Box

90m Max

1:2 Splitter

FO FO


Telecom Room

Central Office

Outside Plant

Inside Flat

GPON Structure F.O. Cable Network to Small Building (Less than 32 Customers) – Scenario II



No. of Customer (1:64) = 2,048

STB

N x RJ45 Socket

JB with Drop

Closure

Outdoor FDH Cabinet


48F/1000F Ribbon2F

Drop Cable ONT

CAT-6ODF


Joint Box

90m Max

8F/16 F / 24F DistributionLoose tube

1:2 Splitter

FO FO


24



STANDARD CABLE DRUM LENGTH (Fiber Optic Cables)

SIC Spec. SizeCable

Diameter (mm)

Drum Length (Meter)

Un-Armoured7890111305 FCS1 JF - 4F 11.5

31007890111313 FCS1 JF - 8F 11.5

7890111321 FCS1 JF - 16F 11.5

7890111330 FCS1 JF - 24F 11.5

7892100483 FCS4-A Ribbon 48F

13.5

3000

7892100726 FCS4-A Ribbon 72F

14.5

7892101005 FCS4-A Ribbon 100F

14.5

7892102001 FCS4-A Ribbon 200F

19.0

7892103008 FCS4-A Ribbon 300F

23.0

7892104004 FCS4-A Ribbon 400F

24.0

7892106007 FCS4-A Ribbon 600F

24.0

7892108000 FCS4-A Ribbon 800F

30.0

7892110004 FCS4-A Ribbon 1000F

30.0

Armoured7890111518 FCS1 / CS8 JF 8F 18.0

31007890111526 FCS1 / CS8 JF 16F 18.0

7890111534 FCS1 / CS8 JF 24F 18.0

7892110489 FCS4-A / CS8 Ribbon 48F

18.0

20007892110721 FCS4-A / CS8 Ribbon 72F

20.0

7892111000 FCS4-A / CS8 Ribbon 100F

20.0

Aerial

7880004004 FCS3 *4F 11.0

41007880008000 FCS3 *8F 11.0

7880016002 FCS3 16F 21.0

7880024005 FCS3 24F 21.0

Indoor

7890111402 FCS1 JF 4F 11.0 1000

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7890111410 FCS1 JF 8F 11.0

7890111429 FCS1 JF 16F 11.0

7890111437 FCS1 JF 24F 11.0

7892120484 FCS4-A 48F 13.0

7892120727 FCS4-A 72F 14.0

7892121006 FCS4-A 100F 18.0

7892122002 FCS4-A 200F 18.0

7892123009 FCS4-A 300F 23.0

7892124005 FCS4-A 400F 23.0

7892126008 FCS4-A 600F 23.0

Drop Cable

7850111024 FCS9 (Indoor) 2F 3.1x2mm

10007850112024

FCS10 (Outdoor) 2F 3.1x2mm

new FCS9 or FCS10 **4F 3.8x3mm



* 4F & 8F Aerial Cables are not to be ordered any more.** 4F, 6F & 8F Drop Cables are not contracted items.

FTTH ITEMS WITH PRICE

S/No ITEM DESCRIPTION

1 5107500402 TOOL KIT FOR FIELD INSTALLABLE CONNECTOR FOR DROP CABLE

2 7808101013 ROSETTE INDOOR CABINET FOR DROP CABLE TERMINATION

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3 7814101024 SPLITTER OPTICAL FIBER 1:2 PLC

4 7814101324 SPLITTER OPTICAL FIBER 1:32 PLC

5 7814805013 TUBING FIBER 4MM FOR FIBER PROTECTION (50 METER ROLL)

6 7814805024 TUBING FIBER 5MM FOR FIBER PROTECTION (50 METER ROLL)

7 7814810013 TUBING SPIRAL 4MM FOR FIBERS (50 METER ROLL)

8 7850110013 CABINET OUT DOOR 1.1MX1.1MX0.4M FOR FTTH MDU

9 7850111013 E-CONNECTOR FAST FIELD FOR FTTH

CABLES & JOINTS

10 7892102001 CABLE FIBER OPTIC 200 FIBER MULTICORE RIBBON FCS4 UNARMORED




14 7892108002CABLE FIBER OPTIC 800 FIBER MULTICORE RIBBON FCS4 UNARMOURED

15 7892110002 CABLE FIBER OPTIC 1000 FIBER MULTICORE RIBBON FCS4 UNARMOURE

16 7892122002 CABLE FIBER OPTIC 200 FIBER INDOOR- RIBBON TYPE- SPEC. FCS4(

17 7892123009 CABLE FIBER OPTIC 300 FIBER INDOOR- RIBBON TYPE- SPEC. FCS4(

18 7892124005 CABLE FIBER OPTIC 400 FIBER INDOOR FCS4

19 7892126008 CABLE FIBER OPTIC 600F INDOOR

20 7892601008 JOINT DUCT RIBBON CABLE 100FIBER MS12





25 7892608002 JOINT DUCT 800F RIBBON CABLE 2178LS(1)+2523(7)+2521RF(25)+21

26 7892610007 JOINT DUCT RIBBON CABLE 1000FIBER MS12A

27 7850111024 CABLE FIBER OPTIC 2F DROP INDOOR FOR FTTH

28 7850112024 CABLE FIBER OPTIC 2F DROP OUT DOOR FOR FTTH

29 7850140013 JOINT CLOSURE DUCT FO DROP CABLE 2F FOR FTTH

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Guide Lines for GPON Planning

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