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1995-07-14
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Date of Last Update : 16 May 1995
List of ITU-T K-Series Recommendations in force
** - Series K
* Protection against interference
K.1 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Connection to earth of an audio-frequency telephone line in cable
K.2 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Protection of repeater power-feeding systems against interference from
neighbouring electricity lines
K.3 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Interference caused by audio-frequency signals injected into a power
distribution network
K.4 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Disturbance to signalling
K.5 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Joint use of poles for electricity distribution and for
telecommunications
K.6 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Precautions at crossings
K.7 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Protection against acoustic shock
K.8 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Separation in the soil between telecommunication cables and earthing
system of power facilities
K.9 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Protection of telecommunication staff and plant against a large earth
potential due to a neighbouring electric traction line
K.10 (1993) [Rev.1] [14 pp.] [Publ.: Sep.94]
Unbalance about earth of telecommunication installations
K.11 (10/93) [Rev.3] [11 pp.] [Publ.: Jul.94]
Principles of protection against overvoltages and overcurrents
Note - C: 6/17/32
K.12 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Characteristics of gas discharge tubes for the protection of
telecommunications installations
K.13 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Induced voltages in cables with plastic-insulated conductors
K.14 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Provision of a metallic screen in plastic-sheathed cables
K.15 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Protection of remote-feeding systems and line repeaters against
lightning and interference from neighbouring electricity lines
K.16 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Simplified calculation method for estimating the effect of magnetic
induction from power lines on remote-fed repeaters in coaxial pair
telecommunication systems
K.17 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Tests on power-fed repeaters using solid-state devices in order to check
the arrangements for protection from external interference
K.18 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Calculation of voltage induced into telecommunication lines from radio
station broadcasts and methods of reducing interference
K.19 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Joint use of trenches and tunnels for telecommunication and power cables
K.20 (1993) [Rev.2] [11 pp.] [Publ.: Jul.94]
Resistibility of telecommunication switching equipment to overvoltages
and overcurrents
K.21 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Resistibility of subscribers' terminals to overvoltages and overcurrents
K.22 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Overvoltage resistibility of equipment connected to an ISDN T/S bus
K.23 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Types of induced noise and description of noise voltage parameters for
ISDN basic user networks
K.24 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Method for measuring radio-frequency induced noise on telecommunications
pairs
K.25 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Lightning protection of optical fibre cables
K.26 (1988) [Blue Book Fasc. IX] [Publ.: Mar.90]
Protection of telecommunication lines against harmful effects from
electric power and electrified railway lines
K.27 (03/91) [New] [1 pp.] [Publ.: Jun.91]
Bonding configurations and earthing inside a telecommunication building
K.28 (1993) [Rev.1] [11 pp.] [Publ.: Jul.94]
Characteristics of semi-conductor arrester assemblies for the protection
of telecommunications installations
K.29 (01/92) [New] [4 pp.] [Publ.: Apr.92]
Coordinated protection schemes for telecommunications cables below
ground
K.30 (1993) [New] [7 pp.] [Publ.: Jul.94]
Positive temperature coefficient (PTc) thermistors
K.31 (1993) [New] [7 pp.] [Publ.: Jul.94]
Bonding configurations and earthing of telecommunication installations
inside a subscriber's building
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Some 1120 Recommendations from the Blue Book are still in force. They
are included in fascicles and volumes of the Blue Book that may still
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