Optical Fiber Cable Networks

Route Survey & Design
Extensive route survey is carried out prior to designing the OFC network to obtain the following essential data

BOQ Estimation and approval from Customer
On the basis of survey details an estimated BOQ is prepared and submitted to get the approval from the Customer.

Supply of Materials
Ceiba supplies the following material required for construction of Backbone Network.

Right of Way Permissions
On behalf of the client, Ceiba obtains necessary statutory permissions from regulatory bodies. Single Line Diagram (SLD) is made to determine the jurisdictions and permissions obtained.

Trenching, ducting and backfilling

Duct Integrity Test

After backfilling ducts shall be tested for integrity. Two types of tests are conducted, viz., Air Tightness Test and Kink-free Shape test).

Fiber Termination

All fibers of Optical Fiber Cables will be terminated on Fiber Distribution Management System (FDMS) at each regenerator (REG) or Add Drop Multiplexer (ADM) location. Installation of FDMS is done according to the manufacturer's specification. End to End testing can be carried out from the FDMS to FDMS using the connectors which are mounted on the FDMS.

Survey and Digitized Maps

The survey digitized maps will have the following information:

Cable Testing

The cable will be tested before pulling/blowing to ensure continuity as well as to check all the parameters in both 1550 nm and 1310 nm windows.

Aerial Cabling

At places where open trenching is not possible due to very narrow roads and due to delay in obtaining RoW, aerial cabling will be adopted as a temporary solution. Also by using special cables (ADSS) this will be laid along the Transmission lines for longer distances.

Supply and Installation of Distribution Box

Distribution boxes will be positioned at every location where a main cable is to be distributed to sub - areas with lesser pair cables.

Cable blowing

Cable blowing machine, (Cable jet or any other machine), would be deployed along with a good compressor delivering 10 Kg/cm2 pressure and 700 cfm discharge. Cable drum will be loaded on payoff stand & unwound from topside of the drum. Pay off stand would be placed properly secured so that it does not collapse while dispensing OFC.

Fusion splicing

Splicing is done using a good quality splicing machine. Splice loss per joint will be minimum and would not be more than 0.07 dB. In no case average splice loss per link will be more than 0.06 dB x No. of splices. At least 0.6 M to 0.8 M fiber would be stored in cable tray. Fiber would be neatly coiled without kinks. Minimum bending radius of 80mm would be ensured, Joint closure would be sealed properly before it is taken out of the controlled environment free from dust particles and air-conditioned splicing van.

End to End Link Testing

Link Test is carried out on entire section terminated at both ends after completion of tasks to ensure the losses are within permissible limits on all fiber.

Horizontal Directional Drilling

This technique is adopted wherever open trenching cannot be made due to congestion.

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