Telecommunication Fiber Optic Cable Repair and Maintenance Services Market Size, Share and Trends Analysis Research Report Information By End Use (Telecom Providers, Enterprises, Government, Educational), By Cable Type (Single Mode, Multi Mode, Armored, Loose. Telecommunication Fiber Optic Cable Repair and Maintenance Services Market Size, Share and Trends Analysis Research Report Information By End Use (Telecom Providers, Enterprises, Government, Educational), By Cable Type (Single Mode, Multi Mode, Armored, Loose. Recommendation ITU-T L. 25 deals with general features in relation to the maintenance and operation of optical fibre cable networks. Electric power special optical fiber cable, can be simply understood as the optical cable and power line belongs to the same tower erection, the optical cable does not need to be set up. The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen-dations on them with a view to standardizing telecommunications on a. Working Party 2 of ITU-T Study Group 15 is entitled "Optical technologies and physical infrastructures” " and is responsible, among other, for studies covering: − Characteristics of optical connectors and optical components that need to be specified for supporting outside plant applications (under. Former ITU-T L.