THE SORTAGE OF BASIC RAW MATERIALS FOR PRODUCTION OF METALLIC COMMUNICATION CABLES ON ONE HAND AND CONSTANTLY GROWING DEMAND FOR INCREASED DENSITY OF THE COMMUNICATION NETWORK AND FOR HIGHER TRANSMISION RATES ON THE OTHER HAND, STIMULATED THE DESING ENGINEERS TO LOOK FOR NEW MEDIA SUITED FOR THE DATA TRANSMISSION. ONE OF THE SUBSTITUTION FOR METALLIC TRANSMISSION LINES ARE OPTICAL CABLES.THE SORTAGE OF BASIC RAW MATERIALS FOR PRODUCTION OF METALLIC COMMUNICATION CABLES ON ONE HAND AND CONSTANTLY GROWING DEMAND FOR INCREASED DENSITY OF THE COMMUNICATION NETWORK AND FOR HIGHER TRANSMISION RATES ON THE OTHER HAND, STIMULATED THE DESING ENGINEERS TO LOOK FOR NEW MEDIA SUITED FOR THE DATA TRANSMISSION. ONE OF THE SUBSTITUTION FOR METALLIC TRANSMISSION LINES ARE OPTICAL CABLES.