OFC Applications Guidelines

8/12/2019 OFC Applications Guidelines

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1. Metal-Free Optical Fibre Cable - Used for Local and Trunk networks

2. High Count Metal Free Optical Fibre Cable (Ribbon Type for Access Network) -

Used for Access Networks

3. Non Zero Dispersion Shifted Single Mode Metal Free Optical Fibre Cable - Used

for SDH and DWDM systems for long haul transmission in the networks.

4. Optical fibre cable for Coastal Areas & High sub-soil water condition - Used in

Coastal areas and sub-soil water conditions.5. Metal-Free Optical Fibre Cable (G.652 D Fibre) - Used for Local and Trunk

networks.

6. Non-Zero Dispersion Optical Fibre Cable for Wideband Optical Transport (G.656

Fibre) Used for Wideband Optical Transport carrying DWDM signals for long

haul transmission

7. Armoured Optical Fibre Cable for Duct application Used for Local and Trunk

networks.

The detailed constructional design and features of the cables are specified in

Annexure-I.

II. Armoured Optical Fibre Cable(Underground Installation - Directly

Buried): The Armoured Optical Fibre Cable of Multi-Loose Tube construction typeis mechanically protected by corrugated armour. The cable may be installed directly

buried in the ground at a proper depth or installed in the ducts. Following are the few

types of the Armoured Optical Fibre Cable for Underground - Direct Burial:

1. Armoured Optical Fibre Cable for Direct Burial (Underground) - Used for Local

and Trunk networks

2. High Count Armoured Optical Fibre Cable (Ribbon Type for Access Network) -

Used for Access Networks

3. Non Zero Dispersion Shifted Single Mode Armoured Optical Fibre Cable - Used

for SDH and DWDM systems in the networks.4. Optical Fibre Cable for Concrete surfaces - Used under concrete surfaces.


Annexure-II.

III. Aerial Optical Fibre Cables (Aerial Installation): The aerial installationnormally uses the poles or towers with special types of Fixtures & Accessories to

support the optical fibre cable. The Aerial Optical fibre cables may be of Self-

supporting Metal-Free type, or may have armouring for more mechanical protection.

Following are the few types of the Optical Fibre Cable for Aerial installation:

1. Self-Supporting Metal-Free Aerial Optical Fibre Cable (For Hilly & Rural areas) -

Used between two points on the aerial alignment in Hilly & Rural areas with

maximum span length of 100 meters.

2. Self-Supporting Metal-Free Aerial Optical Fibre Cable (For Urban areas). - Used

between two points on the aerial alignment between the poles or pole to building

in the urban areas with maximum span length of 75 meters.

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Annexure-III.

IV. Fibre-to-the-Home (FTTH) Optical Fibre Cables: Optical fibre networksservicing FTTH systems rely upon outside plant cables to ensure high quality, reliable

service to the subscribers. Last-mile connectivity in FTTH for each subscriber isachieved through indoor cables, viz. Simplex, Duplex, Mini cables, etc. All these

cables are designed to withstand the environment for indoor, mainly equipped with

fire retardant and tighter bending properties. Since the cable deployed indoors is

subjected to sharp bends, bend insensitive optical fibres are preferred over

conventional fibres. Moreover, the outer jacket is generally made of fire resistant

materials, like Low Smoke Zero Halogen (LSZH) etc. The last mile connectivity

cables are also designed for easy connectorization, enabling easy maintenance at the

user premises. Following are the few types of the Optical Fibre Cable for FTTH

applications:

1. Outdoor Drop Optical Fibre Cable (Figure 8 Type) Used as Outdoor cable forinstalling between two poles and a pole to building.2. Flexible Optical Fibre Cable (For Indoor Applications) Used as Indoor cable

for interconnecting/drop/distribution cabling purpose within a high rise building.

3. Optical Fibre Drop Cable - Used as Indoor as well as Outdoor cable forinstallation between two poles and inside home.

4. Micro Duct Optical Fibre Cable Used for installation in Micro-ducts byblowing method.

5. Optical Fibre Cable for FTTH application (G.657 A Fibre) Used as Indoorcable for installing inside the premises/buildings for FTTx applications,

employing bending loss-insensitive optical fibre.


Annexure-IV.

V. Optical Fibre Cables for laying over Power Lines: These cables areinstalled on the overhead power distribution network. Following are the few types of

the Optical Fibre Cable for laying over Power Line.

1. All-Dielectric Self-supporting (ADSS) Optical Fibre Cable for laying on powerline alignments - To be installed on the overhead power distribution network up

to 33 KV.

2. Optical Ground Wire (OPGW) Cable for laying on power lines) - To be installedon existing high voltage Power Line alignments beyond 33 KV, up to 400 KV.

The cable may also replace the existing Ground Wire of the alignment.


Annexure-V.

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ANNEXURE-I

1. METAL FREE OPTICAL FIBRE CABLE

Description:Multi-Loose tube Single Jacket Optical Fibre Cable is meant for Underground Duct

Installation. Extra protection is provided by Nylon as outermost layer which also ensures

termite resistance. This cable is metal-free and hence, there is no need to ground the cable.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Recommended for Underground Duct Installation only. Strain-free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi tube design. Extra protection provided by Nylon as outermost sheath.

Note: This is recommended for Long Haul/ Short haul networks.

Application:Under-Ground, Duct

Cross-Sectional Diagram:

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2. HIGH COUNT METAL-FREE OPTICAL FIBRE CABLE (RIBBON

TYPE FOR ACCESS NETWORK) - USED FOR ACCESS

NETWORKS

Description:Multi tube Single Jacket Ribbon Optical fibre Cable is meant for Underground Duct

Installation. Extra protection is provided by Nylon as outermost layer which also ensures

termite resistance. This cable is metal-free and hence, there is no need to ground the cable.

The fibre ribbon combines robust performance for duct installations with the productivity of

high-count mass fusion splicing. The optical fibres are arranged into ribbon units by placing

the fibres in a flat array of 12 colour-coded fibres bonded together by a UV- cured matrix

material.

Features: Available in fibre counts from 48 F, 96 F, 144 F, 288 F & 576 F.

Precise fibre and ribbon geometries result in excellent mass-fusion splicing yields. Recommended for Underground Duct Installation only. Strain free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi tube design. Extra protection provided by Nylon as outermost sheath.

Note: This is recommended for access network.



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3. NON-ZERO DISPERSION SHIFTED SINGLE MODE METAL-

FREE OPTICAL FIBRE CABLE (NZDS) - (G.655 C FIBRE)

Description:Multi-tube Single Jacket Optical fibre Cable is meant for Underground Duct Installation.

Extra protection is provided by Nylon as outermost layer which also ensures termite

resistance. This cable is metal-free and hence, there is no need to ground the cable. Thiscable is envisaged to be installed in the ducts and meant to carry high bit rate optical signals

including DWDM signals.

Features: Available in fibre counts from 12 F, 24 F, 48 F & 96 F. Recommended for Underground Duct Installation only. Strain-free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design. Extra protection provided by Nylon as outermost sheath.Note: This is recommended for Long Haul/ Back bone networks for longer link lengths

as lesser number of dispersion compensators are required for NZDSF fibre.



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4. OPTICAL FIBRE CABLE FOR COASTAL AREAS & HIGH SUB

SOIL WATER CONDITION - USED IN COASTAL AREAS

Description:Multi-tube Single Jacket Poly Aluminium Cable is multipurpose cable designed for diverse

needs. Polymer coated Aluminium tape and Flooding Jelly makes this cable moisture-proof,

and Glass Roving yarn adds to tensile strength. This cable is metal-free and hence, there is

no need to ground the cable.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Moisture protected cable due to Polymer coated Aluminium Tape. Strain free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design.

Note: This is recommended for Long Haul/ Short haul networks in Coastal areas and

sub soil water conditions.

Application:Under-Ground, Duct / Coastal areas


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5. METAL-FREE OPTICAL FIBRE CABLE (G.652 D FIBRE)

Description:Multi-tube Single Jacket Optical Fibre Cable is meant for Underground Duct Installation.


resistance. This cable is metal-free and hence, there is no need to ground the cable.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Recommended for Underground Duct Installation only. Strain-free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design. Extra protection provided by Nylon as outermost sheath.

Note: This is recommended for Long Haul/ Short haul networks.



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6. NONZERO DISPERSION OPTICAL FIBRE CABLE FOR

WIDEBAND OPTICAL TRANSPORT (G. 656 FIBRE)

Description:Multi-tube Single Jacket Optical fibre Cable is meant for Underground Duct Installation.


resistance. This cable is metal-free and hence, there is no need to ground the cable. It is

fully compatible with existing NZDS fibre and also supports long haul transmission

compatible with S, C and L bands. It provides lower attenuation at 1400 nm wavelength

region and efficiently supports CWDM cheap transmission system at 10 Gb/s and 40 Gb/s.

It provides longest uncompensated reach (~200 km) in metropolitan network, resulting in

cost saving compared to conventional single mode fibre.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Recommended for Underground Duct Installation only. Strain-free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design. Extra protection provided by Nylon as outermost sheath.

Note: This is recommended for Long Haul/ Back bone networks for longer link lengths

as lesser number of dispersion compensators are required.



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7. ARMOURED OPTICAL FIBRE CABLE FOR DUCT APPLICATION

(G.652 D Fibre)

Description:Multi-tube Single Jacket Metallic Armoured Cable is multipurpose cable designed for

diverse needs. This design is robust and suitable for duct installation. This design is

available with Wet core as well as Semi-Dry Core. Semi-Dry core design is lighter inweight and will take lesser time for maintenance & installation. This design is suitable and

recommended for installation in duct in Indian tropical conditions.

Features: Available in fibre counts from 6 F, 12 F, 24 F, 48 F & 96 F. Easy to Install due to Semi dry core design and easy to peel but rugged PE jacket. Rodent protection due to Corrugated Steel Tape Armour. Strain-free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core.

Easy Mid-span access because of Multi-tube design. Recommended for Long Haul/ Short haul networks.

Note:This cable has to be grounded as it contains metal.

Application:Under Ground Duct

Cross-Sectional Diagrams:

Semi DryCore

Wet Core

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ANNEXURE-II

1. ARMOURED OPTICAL FIBRE CABLE FOR DIRECT BURIAL

(UNDERGROUND)


diverse needs for added tensile strength. It has two embedded strength members in outer

sheath as stainless wires which are diametrically opposite to each other. Its robust design

withstands the most demanding environment of direct burial.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Direct Burial Installation due to double sheath and Corrugated Steel Tape. Rodent protection in-spite of Direct Burial Application due to Corrugated Steel Tape. Strain-free fibres due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design Two Stainless Steel wires diametrically opposite to each other in outer sheath, add to

tensile strength.

Recommended for Long Haul / Back bone networks.Note:This cable has to be grounded as it contains metal.

Application:Under Ground, Direct Buried


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2. High Count Armoured Optical Fibre Cable (Ribbon Type)For Access

Network


diverse needs for added tensile strength. It has two embedded strength members in outer


withstands the most demanding environment of direct burial.

The Ribbon fibre combines robust performance for direct buried installations with the

productivity of high-count mass fusion splicing. The optical fibres are arranged into ribbon

units by placing the fibres in a flat array of 12 colour-coded fibres bonded together by a

UV-cured matrix material.

Features:

Available in fibre counts from 48 F, 96 F, 144 F, 288 F & 576 F. Direct Burial Installation due to double sheath and Corrugated Steel Tape. Rodent protection in-spite of Direct Burial application due to Corrugated Steel Tape. Strain-free fibres due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design Two Stainless Steel wires diametrically opposite to each other in outer sheath add to

tensile strength.

Recommended for Access networks.Note:This cable has to be grounded as it contains metal.



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3. Non-Zero Dispersion Shifted Single Mode Armoured Optical Fibre

Cable

Description:

Multi-tube Single Jacket Metallic Armoured Cable is multipurpose cables designed fordiverse needs for added tensile strength. It has two embedded strength members in outer


withstands the most demanding environment of direct burial. This cable is meant to carry

high bit rate optical signals including DWDM signals.

Features: Available in fibre counts from 12 F, 24 F, 48 F & 96 F. Direct Burial Installation due to double sheath & Corrugated Steel Tape. Rodent protection in spite of Direct Burial application due to Corrugated Steel Tape Strain-free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design. Two Stainless Steel wires diametrically opposite to each other in outer sheath add to

tensile strength.

Recommended for Long Haul/ Back bone networks for longer link lengths as lesser no.of dispersion compensators are required for NZDSF fibre.

Note:This cable has to be grounded as it contains metal.



4. UNDERGROUND DIRECT BURIED CABLE (CONCRETE

SURFACE)

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ANNEXURE-III

1. SELF SUPPORTING METAL FREE AERIAL OPTICAL FIBRE CABLE (FOR

HILLY & RURAL AREAS) - (G.652 D FIBRE)

Description:Multi-tube Double Jacket All-Dielectric Self-Supporting (ADSS) cable is multipurpose

cable designed for diverse needs. Its robust design and high tensile strength makes it

suitable for Aerial application. This cable can be installed between two points on the aerial

alignment in Hilly & Rural areas with maximum span length of 100 m. This cable is metal-

free and hence, there is no need to ground the cable.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Double sheath protection ensures better protection. Can be installed on telephone poles/poles. Strain-free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi-tube design. Recommended for Long Haul/ Short haul networks.

Note: These cables can be installed on power transmission line alignments (up to

11 KVA).

Application:Recommended for Aerial/ Hilly & Rural Areas


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2. SELF SUPPORTING METAL-FREE AERIAL OPTICAL FIBRE CABLE (FOR

URBAN AREAS) - (G.652 D FIBRE)

Description:Multi-tube Single Jacket All-Dielectric Self-Supporting (ADSS) cable is multipurpose cable

designed for diverse needs. Its robust design and high tensile strength makes it suitable forAerial application. This cable can be installed between two points on the aerial alignment

(between the poles or pole to building) in urban areas with maximum span length of 75 m.

This cable is metal-free and hence, there is no need to ground the cable.

Features: Available in fibre counts from 6 F, 12 F, 24 F & 48 F. Can be installed on telephone poles/poles. Strain-free fibre due to S-Z stranding and loose tube design Longitudinal water protection enabled by water blocking compounds in tube and core.

Easy Mid-span access because of Multi-tube design. Recommended for Long Haul/ Short haul networks.

Note: These cables can be installed on power transmission line alignments (up to

11 KVA).

Application:Recommended for Aerial/UrbanAreas


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ANNEXURE-IV

1. OUTDOOR OPTICAL FIBRE DROP CABLE (FIGURE-8 TYPE) (G.652 D

FIBRE)

Description:Outdoor Optical Fibre Cable is a drop cable with Uni-tube construction with Figure Eight

(8) design. It is suitable for installing between two poles and a pole to building. The cable is

light weight and flexible. It has good mechanical protection with stable temperature

performance conditions to withstand varying environmental conditions due to exposure in

open. As this cable contains metal there is a specific need to ground the cable.

Features: Fibre design is available in fibre counts of 4 F, 6 F, 8 F, 12 F, 16 F & 24 F.

Ribbon fibre design is available in fibre counts of 4 F. Use of Stainless Steel wire makes it suitable for Aerial installation. Aramid yarns around central tube adds to tensile strength. Can be hanged from Pole to Building & Pole to pole. ARP provides more tensile strength and stiffness. Loose buffered construction keeps fibres strain-free. Uni-tube design for drop application and faster installation.

Note: This is recommended for Short haul FTTH networks.

Application: Outdoor FTTH/ Last Mile / Aerial Drop


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12 Fibre Cable Design

4 Fibre Ribbon Cable Design

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4 F Cable Design

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3. OPTICAL FIBRE DROP CABLE (INDOOR/OUTDOOR) - (G.652 D

FIBRE)

Description:Optical fibre installation cable is a drop cable with Uni-tube construction. It can be hanged

on poles. Ruggedized construction is for excellent installation performance, easilystrippable for fast installation. This can be installed inside building. This can also install

from pole to pole. As this cable contains metal there is a specific need to ground the cable.

Features: These are available in fibre counts 2 F, 4 F & 6 F. Use of FRP makes it suitable for Aerial installation. Can be hanged from Pole to pole and inside building. ARP provides more tensile strength and stiffness. Loose buffered construction keeps fibre strain-free. Uni-tube design for drop application and faster installation.Note: This is recommended for Short haul FTTH networks.Application:Indoor/Outdoor FTTH/Last Mile/Aerial Drop


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4. MICRO DUCT OPTICAL FIBRE CABLE (G.652 D FIBRE)

I. Uni -Tube design:

Description:Uni-tube SingleJacket Micro cable is envisaged to be installed in the Micro Ducts. Microducts can also be installed in previously installed ducts. Its uni-tube design with lesser

diameter makes it lighter in weight and easy to install by blowing method. This cable is

metal-free and hence, there is no need to ground the cable.

FRP provides desired stiffness and anti-buckling effect for the cable so that it can be blown

in micro duct. This cable is suitable for Drop application with installation by blowing

method.

Features:

Available in fibre counts from 6 F, 12 F & 24 F FRP as Embedded strength member increases Anti-Buckling property. Suitable for installation in Micro ducts by blowing method. Can be installed in Pre-installed ducts by blowing in Micro ducts. Strain-free fibre due Uni-tube design Longitudinal water protection enabled by water blocking compounds in tube

Note: This is recommended for Short haul FTTH networks/Long Haul networks.

Application:Recommended in Micro ducts for Indoor/Outdoor FTTH/Last Mile


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II Multitube design:

Description:Multi-tube Single Jacket Micro cable is envisaged to be installed in the Micro Ducts. Micro

ducts can also be installed in previously installed ducts. Its lesser diameter makes it lighter

in weight and easy to install by blowing. This cable is metal-free and hence, there is no

need to ground the cable.

Features: Available in fibre counts from 48 F & 72 F. High fibre density. Installed in Micro Duct by blowing. Can be installed in Pre-installed ducts by blowing in Micro ducts. Strain-free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi tube design.

Note: This is recommended for Short haul FTTH networks/Long Haul networks.

Application:Recommended in Micro ducts for FTTH networks /Long Haul networks.


OUTER JACKET (NYLON)

CENTRAL MEMBER (FRP ROD)

POLYESTER BINDER

LOOSE TUBE WITH FIBRES

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5. OPTICAL FIBRE CABLE FOR FTTH APPLICATION (G.657A)

Description:This is Metal-free Optical Fibre Cable, using optical fibre conforming to the ITU-T

Rec. 657.A for FTTx applications. This cable is to be installed inside the premises/buildings

and meant to carry high bit rate optical signals to the end user. The optical fibre being used

is bending loss-insensitive which is suitable for fibre to the home application. These cableshave low weight, small volume and high flexibility. The optical fibre cable is protected with

Low Smoke Zero Halogen (LSZH) sheath. This cable is metal-free and hence, there is no

need to ground the cable.

Features: Flat cable design for 1F & 2F. Uni-tube design for higher fibre count 1F to 12F. To be installed within building premises. Can be connectorized and terminated in field.

G.657 fibre makes its in-building installation easier.Note: This is recommended for FTTH networks.

Application: Indoor/ FTTHLast Mile


2F Flat Cable Design

2F Uni-tube Cable Design

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ANNEXURE-V

1. ADSS OPTICAL FIBRE CABLE FOR LAYING ALONG POWER

LINE ALIGNMENTS(G.652 D FIBRE)

Description:Multi-tube Double Jacket All-Dielectric Self Supporting (ADSS) cable is multipurpose

cable designed for diverse needs. Its robust design and high tensile strength makes it

suitable for Aerial application. Dielectric strength member and Anti tracking compound in

outer sheath makes it suitable for installation on power lines up to 33 KV. Its Semi dry core

cable design makes it light weight and easy to install. This cable can be installed for span

length of 100 m. This cable is metal-free and hence, there is no need to ground the cable.

Features: Available in fibre counts from 24 F, 48 F & 96 F.

Can be installed with Power lines up-to 33 KV. Anti tracking compound in outer sheath resists dry band arcing. Easy to install due to dry core design & easy to peel, but rugged PE jacket. Strain-free fibre due to S-Z stranding and loose tube design. Longitudinal water protection enabled by water blocking compounds in tube and core. Easy Mid-span access because of Multi tube design.Application:ADSS on Power transmission lines(up-to 33 KV Lines)


Wet Core Cable Design

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Semi Dry Core Cable Design

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2. OPTICAL GROUND WIRE (OPGW) FOR LAYING ALONG POWER LINES

(G.652 D & G.655 FIBRE)

Description:Optical Ground Wire Cable is for installation on EHV Transmission lines, up to 400 KV.

The cable performs the dual functions of Earth Wire and Optical Fibre Cable. The cable hasgood mechanical protection with stable temperature performance, as it can be exposed to

varying environmental conditions. The cable may also be a replacement to the existing

Ground Wire of the system, with no modifications to the Towers.

The OPGW cable is intended to be installed on the new or existing overhead power

distribution networks of more than 33 KV and up to 400 KV. The constructional design of

Cable Core assembly (Stainless steel loose tube) has been specified, as the design of

complete cable depends on a number of variables, viz., electrical, mechanical and physical

characteristics of existing alignments and towers.

Features: Available in 24 F. Can be installed on Transmission lines of more than 33 KV and up-to 400 KV. Construction of OPGW cable depends on the electrical and mechanical characteristics

of existing alignments and will be different for different power line voltages, fault

current, and span lengths, etc.

The design of the cable also varies with the physical characteristics of towers.Application:OPGW on Power transmission lines of more than 33 KV and up-to 400 KV

Lines


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