ITU-T K Series: Protection Against Interference

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Standard Overview

The ITU K series are recommendations for protection against interference. The K recommendations cover every aspect of the telecommunications system and include protection components.
The K series recommendations are comprised of the following:

K.5: Joint use of poles for electricity distribution and for telecommunications
K.6: Precautions at crossings
K.7: Protection against acoustic shock
K.8: Separation in the soil between telecommunication cables and earthing system of power facilities
K.9: Protection of telecommunication staff and plant against a large earth potential due to a neighbouring electric traction line
K.10: Low frequency interference due to unbalance about earth of telecommunication equipment
K.11: Principles of protection against overvoltages and overcurrents
K.12: Characteristics of gas discharge tubes for the protection of telecommunications installations
K.13: Induced voltages in cables with plastic-insulated conductors
K.14: Provision of a metallic screen in plastic-sheathed cables
K.18: Calculation of voltage induced into telecommunication lines from radio station broadcasts and methods of reducing interference
K.19: Joint use of trenches and tunnels for telecommunication and power cables
K.20: Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents
K.21: Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents
K.23: Types of induced noise and description of noise voltage parameters for ISDN basic user networks
K.24: Method for measuring radio-frequency induced noise on telecommunications pairs
K.26: Protection of telecommunication lines against harmful effects from electric power and electrified railway lines
K.27: Bonding configurations and earthing inside a telecommunication building
K.28: Parameters of thyristor-based surge protective devices for the protection of telecommunication installations
K.29: Coordinated protection schemes for telecommunication cables below ground
K.34: Classification of electromagnetic environmental conditions for telecommunication equipment – Basic EMC Recommendation
K.35: Bonding configurations and earthing at remote electronic sites
K.36: Selection of protective devices
K.37: Low and high frequency EMC mitigation techniques for telecommunication installations and systems – Basic EMC Recommendation
K.38: Radiated emission test procedure for physically large systems
K.39: Risk assessment of damages to telecommunication sites due to lightning discharges
K.40: Protection against LEMP in telecommunications centres
K.42: Preparation of emission and immunity requirements for telecommunication equipment – General principles
K.43: Immunity requirements for telecommunication network equipment
K.44: Resistibility tests for telecommunication equipment exposed to overvoltages and overcurrents – Basic Recommendation
K.45: Resistibility of telecommunication equipment installed in the access and trunk networks to overvoltages and overcurrents
K.46: Protection of telecommunication lines using metallic symmetric conductors against lightning-induced surges
K.47: Protection of telecommunication lines against direct lightning flashes
K.48: EMC requirements for telecommunication equipment – Product family Recommendation
K.49: Test requirements and performance criteria for voice terminal telephones subject to disturbance from digital mobile telecommunications systems
K.50: Safe limits of operating voltages and currents for telecommunication systems powered over the network
K.51: Safety criteria for telecommunication equipment
K.52: Guidance on complying with limits for human exposure to electromagnetic fields
K.54: Conducted immunity test method and level at fundamental power frequencies
K.55: Overvoltage and overcurrent requirements for insulation displacement connectors (IDC) terminations
K.56: Protection of radio base stations against lightning discharges
K.57: Protection measures for radio base stations sited on power line towers
K.58: EMC, resistibility and safety requirements and guidance for determining responsibility under co-located telecommunication installations
K.59: EMC, resistibility and safety requirements and procedures for connection to unbundled cables
K.60: Emission levels and test methods for wireline telecommunication networks to minimize electromagnetic disturbance of radio services
K.61: Guidance on measurement and numerical prediction of electromagnetic fields for compliance with human exposure limits for telecommunication installations
K.62: System level radiated emissions compliance using mathematical modelling
K.63: Maintaining the suitability of production telecommunications equipment to its intended electromagnetic environment
K.64: Safe working practices for outside equipment installed in particular environments
K.65: Overvoltage and overcurrent requirements for termination modules with contacts for test ports or surge protective devices
K.66: Protection of customer premises from overvoltages
K.67: Expected surges on telecommunications and signalling networks due to lightning
K.68: Operator responsibilities in the management of electromagnetic interference by power systems on telecommunication systems
K.69: Maintenance of protective measures
K.70: Mitigation techniques to limit human exposure to EMFs in the vicinity of radiocommunication stations
K.71: Protection of customer antenna installations
K.72: Protection of telecommunication lines using metallic conductors against lightning – Risk management
K.73: Shielding and bonding for cables between buildings
K.74: EMC, resistibility and safety requirements for home network devices
K.75: Classification of interface for application of standards on resistibility and safety of telecommunication equipment
K.76: EMC requirements for telecommunication network equipment (9 kHz-150 kHz)
K.77: Characteristics of metal oxide varistors for the protection of telecommunication installations
K.78: High altitude electromagnetic pulse immunity guide for telecommunication centres
K.79: Electromagnetic characterization of the radiated environment in the 2.4 GHz ISM band
K.80: EMC requirements for telecommunication network equipment (1 GHz - 6 GHz)
K.81: High-power electromagnetic immunity guide for telecommunication systems
K.82: Characteristics and ratings of solid-state, self-restoring overcurrent protectors for the protection of telecommunications installations
K.83: Monitoring of electromagnetic field levels
K.84: Test methods and guide against information leaks through unintentional electromagnetic emissions
K.85: Requirements for the mitigation of lightning effects on home networks installed in customer premises
K.86: Method for measuring longitudinal conversion loss (9 kHz - 30 MHz)
K.87: Guide for the application of electromagnetic security requirements - Overview
K.88: EMC requirements for next generation network equipment
K.89: Protection of persons inside a structure using telecommunication services provided by metallic conductors against lightning - Risk management
K.90: Evaluation techniques and working procedures for compliance with exposure limits of network operator personnel to power-frequency electromagnetic fields
K.91: Guidance for assessment, evaluation and monitoring of human exposure to radio frequency electromagnetic fields
K.92: Conducted and radiated electromagnetic environment in home networking
K.93: Immunity of home network devices to electromagnetic disturbances
K.94: Mutual disturbance test method for evaluating performance degradation of converged terminal devices

"ITU-T Recommendations." ITU. N.p., n.d. Web. Retrieved on 25 Nov. 2013
"Application Note: ITU K Series Telecommunications Recommendations." N.p., n.d. Web. Retrieved on 25 Nov. 2013.

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