COS 2 Experiment in Turin: Field Test on an Optical Cable in Ducts

"COS 2" is the second Italian field trial with an optical cable. In this experiment about 5 km of optical cable were installed in normal telephone ducts of the Turin local network between two telephone exchanges. The cable has a capacity of 8 fibers, but, for cost reasons, in 4 of the 5 km...

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Bibliographic Details
Published in:I.R.E. transactions on communications systems 1978-07, Vol.26 (7), p.1028-1036
Main Authors: Cocito, G., Costa, B., Longoni, S., Michetti, L., Silvestri, L., Tibone, D., Tosco, F.
Format: Article
Language:English
Subjects:
Attenuation measurement
Communication cables
Costs
Ducts
Optical attenuators
Optical fiber cables
Optical fiber devices
Optical fiber networks
Optical fiber testing
Telephony
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Summary:"COS 2" is the second Italian field trial with an optical cable. In this experiment about 5 km of optical cable were installed in normal telephone ducts of the Turin local network between two telephone exchanges. The cable has a capacity of 8 fibers, but, for cost reasons, in 4 of the 5 km of cable only 3 fibers were inserted. An installation procedure was developed, allowing the independent laying of several cables in one duct; it was possible to pull up to 1 km of optical cable in order to minimize the number of splices. A special splice (Springroove ® splice) and splicing technique, not requiring the use of a microscope or other intricate tools, were employed. Field measurements of transmission characteristics (attenuation and bandwidth) were performed by means of specially designed measurement equipment. An experimental 140 Mbit/s system was tested on a link about 9 km long (without intermediate repeaters) obtained using this cable.
ISSN:0090-6778
0096-2244
1558-0857
DOI:10.1109/TCOM.1978.1094185