ITU-T-Empfehlungen K-Serie


Die K-Serie beschäftigt sich mit dem Schutz vor Interferenzen.

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.15
Protection of remote-feeding systems and line repeaters against lightning and interference from neighbouring electricity lines

K.16
[Withdrawn] Simplified calculation method for estimating the effect of magnetic induction from power lines on remote-fed repeaters in coaxial pair telecommunication systems

K.17
Tests on power-fed repeaters using solid-state devices in order to check the arrangements for protection from external interference

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 switching equipment to overvoltages and overcurrents

K.21
Resistibility of subscriber's terminal to overvoltages and overcurrents

K.22
Overvoltage resistibility of equipment connected to an ISDN T/S bus

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.25
Protection of optical fibre cables

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
Characteristics of semi-conductor arrester assemblies for the protection of telecommunications installations

K.29
Coordinated protection schemes for telecommunications cables below ground

K.30
Positive temperature coefficient (PTC) thermistors

K.31
Bonding configurations and earthing of telecommunication installations inside a subscriber's building

K.32
[Withdrawn] Immunity requirements and test methods for electrostatic discharge to telecommunication equipment - Generic EMC Recommendation

K.33
Limits for people safety related to coupling into telecommunications system from a.c. electric power and a.c. electrified railway installations in fault conditions

K.34
Classification of electromagnetic environmental conditions for telecommunications equipment - Fast transient and radio frequency phenomena

K.35
Bonding configurations and earthing at remote electronic sites

K.36
Selection of protective devices

K.37
High frequency EMC mitigation techniques for telecommunications installations

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.41
Resistibility of internal interfaces of telecommunication centres to surge overvoltages

K.42
Preparation of emission and immunity requirements for telecommunication equipment - General principles

K.43
Immunity requirements for telecommunication 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 using metallic conductors against direct lightning discharges

K.48
EMC requirements for each 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.53
Values of induced voltages on telecommunication installations to establish telecom and a.c. power and railway operators responsibilities

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 procedures for co-located telecommunication installations

K.59
EMC, resistibility and safety requirements and procedures for connection to unbundled cables

K.60
Emission limits and test methods for telecommunication networks

K.61
Guidance to 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 SPDs

K.66
Protection of customer premises from overvoltages

K.67
Expected surges on telecommunications and signalling networks due to lightning

K.68
Management of electromagnetic interference on telecommunication systems due to power systems

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