SIST EN 300 386 V1.3.2:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Elektromagnetna združljivost (EMC) in zadeve v zvezi z radijskim spektrom (ERM) - Oprema za telekomunikacijsko omrežje - Zahteve za elektromagnetno združljivost (EMC)Electromagnetic compatibility and Radio spectrum Matters (ERM); Telecommunication network equipment; ElectroMagnetic Compatibility (EMC) requirements33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.050.01Telekomunikacijska terminalska oprema na splošnoTelecommunication terminal equipment in generalICS:Ta slovenski standard je istoveten z:EN 300 386 Version 1.3.2SIST EN 300 386 V1.3.2:2004en01-oktober-2004SIST EN 300 386 V1.3.2:2004SLOVENSKI
STANDARD
ETSI ETSI EN 300 386 V1.3.2 (2003-05) 2
Reference REN/ERM-EMC-224 Keywords EMC, network, testing ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2003. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 300 386 V1.3.2:2004

ETSI ETSI EN 300 386 V1.3.2 (2003-05) 3
Contents Intellectual Property Rights.6 Foreword.6 1 Scope.7 2 References.8 3 Definitions and abbreviations.11 3.1 Definitions.11 3.2 Abbreviations.12 4 Installation environment.13 5 Immunity: test methods.13 5.1 Electrostatic discharge.13 5.2 Electrical fast transients/burst.13 5.3 Surges.14 5.3.1 Outdoor signal line ports.14 5.3.2 Indoor signal line ports.14 5.3.3 AC power ports.14 5.4 Immunity to continuous conducted signals.14 5.4.1 Low frequency ( 150 kHz).14 5.4.2 Radio frequency (> 150 kHz).14 5.4.2.1 AC power port.14 5.4.2.2 DC power port.14 5.4.2.3 Signal line port.15 5.5 Immunity to radiated electromagnetic fields.15 5.6 Immunity to power supply disturbances: AC and DC power ports.15 5.6.1 Test of immunity to low frequency disturbances: AC power ports.15 6 Emission: test methods.15 6.1 AC power port.15 6.2 DC power port.15 6.3 Telecommunication Port.16 6.4 Radiated emission.16 7 Test levels and limits.17 7.1 Emission.17 7.1.1 Enclosure port, Radiated electromagnetic field emissions.17 7.1.2 AC ports.17 7.1.2.1 Conducted emissions.17 7.1.2.2 Current harmonics.17 7.1.2.3 Voltage fluctuations.17 7.1.3 DC ports; Conducted emissions.17 7.1.4 Telecommunication ports; Conducted emissions.17 7.2 Immunity.18 7.2.1 Equipment operating in telecommunication centres.18 7.2.1.1 Telecommunication centres, enclosure port.18 7.2.1.2 Telecommunication centres, ports for outdoor signal lines.19 7.2.1.3 Telecommunication centres, ports for indoor signal lines.20 7.2.1.4 Telecommunication centres, AC power ports.20 7.2.1.5 Telecommunication centres, DC power ports.21 7.2.2 Equipment operating in locations other than telecommunication centres.21 7.2.2.1 Other than telecommunication centres, enclosure port.21 7.2.2.2 Other than telecommunication centres, ports for outdoor signal lines.22 7.2.2.3 Other than telecommunication centres, ports for indoor signal lines.22 7.2.2.4 Other than telecommunication centres, AC power ports.23 7.2.2.5 Other than telecommunication centres, DC power ports.23 SIST EN 300 386 V1.3.2:2004

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8 General test configuration.24 9 General operational conditions during testing.24 9.1 Equipment configuration.24 9.2 Operation of multimedia network equipment.25 10 General immunity conditions.25 10.1 General performance criteria.25 11 Switching equipment specific requirements.26 11.1 Test configuration.26 11.2 Operational conditions.27 11.2.1 Emission.27 11.2.2 Immunity.27 11.3 Specific immunity performance criteria.27 11.3.1 Digital port performance criteria.27 11.3.1.1 Performance criterion A (continuous phenomena).27 11.3.1.2 Performance criterion B (transient phenomena).28 11.3.1.3 Performance criterion C (interruptions).28 11.3.2 Analogue port performance criteria.28 11.3.2.1 Performance criterion A (continuous phenomena).28 11.3.2.2 Performance criterion B (transient phenomena).28 11.3.2.3 Performance criterion C (interruptions).28 12 Transmission equipment specific requirements.28 12.1 Test configuration.28 12.2 Operational conditions.29 12.2.1 Emission.29 12.2.2 Immunity.29 12.3 Specific immunity performance criteria.29 12.3.1 Digital signal ports.29 12.3.1.1 Performance criterion A (continuous phenomena).30 12.3.1.2 Performance criterion B (transient phenomena).30 12.3.1.3 Performance criterion C (interruptions).30 12.3.2 Analogue voice frequency signal ports.30 12.3.2.1 Performance criterion A (continuous phenomena).30 12.3.2.2 Performance criterion B (transient phenomena).30 12.3.3 SDH and PDH interfaces.30 12.3.3.1 Tributary and aggregate interfaces.30 12.3.4 ISDN interfaces.31 12.3.4.1 Primary rate access ISDN interfaces.31 12.3.4.2 Network termination NT1 for ISDN "U" interfaces.31 12.3.4.3 Basic access ISDN interfaces.31 12.3.5 Analogue interfaces.31 12.3.5.1 Trunk interfaces and leased line interfaces.31 12.3.5.2 Subscriber interfaces.31 12.3.6 V.10, V.11, V.24, V.28, V.36, X.24 and similar V.- and X.- series interfaces.31 12.3.7 Ethernet and packet-data interfaces.31 12.3.7.1 Performance criterion A (continuous phenomena).31 12.3.7.2 Performance criterion B (transient phenomena).31 12.3.8 Service and maintenance interfaces.31 12.3.9 Synchronization interfaces.32 12.3.9.1 Performance criterion A (continuous phenomena).32 12.3.9.2 Performance criterion B (transient phenomena).32 12.3.10 Remote alarm interfaces.32 12.3.10.1 Performance criterion A (continuous phenomena).32 12.3.10.2 Performance criterion B (transient phenomena).32 13 Digital Subscriber Line (DSL) Access Systems.32 13.1 Test configuration.32 13.2 Operational conditions.33 13.2.1 Immunity.33 13.3 Specific Immunity performance criteria.33 SIST EN 300 386 V1.3.2:2004

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13.3.1 Performance Criteria A (continuous phenomena).33 13.3.2 Performance Criteria B (transient phenomena).34 13.3.3 Performance Criteria C (interruptions).34 14 Power supply equipment specific conditions.34 14.1 Test configuration.34 14.2 Operational conditions.35 14.2.1 Emission.35 14.2.2 Immunity.35 14.3 Specific immunity performance criteria.35 14.3.1 Alternating current secondary interface.36 14.3.1.1 Performance criterion A (continuous phenomena).36 14.3.1.2 Performance criterion B (transient phenomena).36 14.3.2 Direct current secondary interface.36 14.3.2.1 Performance criterion A (continuous phenomena).36 14.3.2.2 Performance criterion B (transient phenomena).37 14.3.3 Control/signal interface.37 14.3.4 Tertiary supply interface.37 15 Supervisory equipment specific conditions.37 15.1 Test configuration.37 15.2 Operational conditions.38 15.3 Specific immunity and resistibility performance criteria.38 15.3.1 Performance criterion A (continuous phenomena).38 15.3.2 Performance criterion B (transient phenomena).39 Annex A (normative): Surges: test method for ports of signal lines remaining within the building.40 A.1 Test set-up for ports with ISDN interface.40 Annex B (informative): Evaluation of test results.43 Annex C (informative): Guidance on EMC performance requirements and methods of measurement for RF ports (in the sense of EN 50083 series) of multimedia network equipment.45 Annex D (informative): The EN title in the official languages.46 History.47
ETSI ETSI EN 300 386 V1.3.2 (2003-05) 6
Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). All published ETSI deliverables shall include information which directs the reader to the above source of information. Foreword This Candidate Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document has been produced by ETSI in response to a mandate from the European Commission issued under Council Directive 98/34/EC [43] (as amended) laying down a procedure for the provision of information in the field of technical standards and regulations. The present document is intended to become a Harmonized Standard, the reference of which will be published in the Official Journal of the European Communities referencing the Council Directive on the approximation of the laws of the Member States relating to electromagnetic compatibility ("the EMC Directive") (89/336/EEC [41] as amended).
National transposition dates Date of adoption of this EN: 25 April 2003 Date of latest announcement of this EN (doa): 31 July 2003 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 January 2004 Date of withdrawal of any conflicting National Standard (dow): 31 July 2006
ETSI ETSI EN 300 386 V1.3.2 (2003-05) 7
1 Scope The present document covers the EMC requirements for equipment intended to be used within a telecommunications network (as defined in clause 3). Examples of such equipment are: • Switching equipment. Such equipment includes: - local telephone exchanges; - remote switching concentrators; - international switches; - telex switches; - network packet switches. • General purpose equipment, which is used as a part of a switching system, may be covered by the scope of other standards. For such equipment, if those other standards fully cover all the requirements of the present document, no further requirements are necessary. Switching equipment can also contain transmission functions, and this has to be recognized during testing. • Non-radio transmission equipment and ancillary equipment. Such equipment includes: - multiplexers; - line equipment and repeaters, e.g. equipment for: - Synchronous Digital Hierarchy (SDH); - Plesiochronous Digital Hierarchy (PDH); - Asynchronous Transfer Mode (ATM); such as: - Digital Cross Connect systems; - network terminations; - transmission equipment used in the access network like XDSL. • Power supply equipment. Such equipment includes: - central power plant; - end of suite power supplies; - uninterruptible power supplies; - stabilized AC power supplies; - and other dedicated telecommunication network power supplies; but excludes equipment which is uniquely associated with or integrated in other equipment. SIST EN 300 386 V1.3.2:2004

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• Supervisory equipment. Such equipment includes: - network management equipment; - operator access maintenance equipment; - traffic measurement systems; - line test units; - functional test units. The function of supervision may either be performed by independent equipment or form part of other telecommunication equipment. If the function of supervision forms part of a telecommunication equipment, the performance may be evaluated simultaneously with other functions (such as switching and transmission) during EMC testing. The environmental classification used in the present document refers to TR 101 651 [42]. The requirements of the present document have been selected to ensure an adequate level of immunity for the apparatus covered by the scope of the present document. The levels do not, however, cover extreme cases which may occur at any location but with a low probability of occurrence. In special cases, situations may arise where the levels of disturbance may exceed the immunity test levels specified in the present document. In these instances, special mitigation measures may have to be employed. Equipment for cabled distribution systems intended only for television and sound signals as defined in EN 50083-2 [3] and optical amplifiers as defined in ITU-T Recommendations G.661 [23] and G.662 [24] are outside the scope of the present document. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. [1] CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring apparatus". [2] EN 50082-1 (1997): "Electromagnetic compatibility - Generic immunity standard -
Part 1: Residential, commercial and light industry". [3] EN 50083-2 (1995): "Cable networks for television signals, sound signals and interactive
services - Part 2: Electromagnetic compatibility for equipment". [4] EN 55022 (1998): "Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement". [5] EN 61000-3-2 (2000): "Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current up to and including 16 A per phase)". [6] EN 61000-3-3 (1995): "Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current <= 16 A per phase and not subject to conditional connection". SIST EN 300 386 V1.3.2:2004

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[7] EN 61000-4-2: "Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test". [8] EN 61000-4-3: "Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test". [9] EN 61000-4-4: "Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test". [10] EN 61000-4-5: "Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement techniques - Surge immunity test". [11] EN 61000-4-6: "Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields". [12] EN 61000-4-11: "Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests". [13] ETSI ETR 238 (1995): "ETSI/CENELEC standardization programme for the development of Harmonized Standards related to Electro-Magnetic Compatibility (EMC) in the field of telecommunications". [14] ETSI ETS 300 011 (1998): "Integrated Services Digital Network (ISDN); Primary rate
user-network interface; Layer 1 specification and test principles". [15] ETSI ETS 300 012 (1992): "Integrated Services Digital Network (ISDN); Basic user-network interface; Layer 1 specification and test principles". [16] ETSI ETS 300 132-1 (1996): "Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct current (dc) sources". [17] ETSI ETS 300 132-2 (1996): "Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 2: Operated by direct current (dc)". [18] ETSI ETS 300 166 (1993): "Transmission and Multiplexing (TM); Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous or synchronous digital hierarchies". [19] ETSI ETS 300 232 (1993): "Transmission and Multiplexing (TM); Optical interfaces for equipments and systems relating to the Synchronous Digital Hierarchy [ITU-T Recommendation G.957 (1993), modified]". [20] IEC 60050-161: "International Electrotechnical Vocabulary. Chapter 161: Electromagnetic compatibility". [21] IEC 60050-714: "International Electrotechnical Vocabulary - Chapter 714: Switching and signalling in telecommunications". [22] ISO/IEC 8802-3 (1996): "Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements -
Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications". [23] ITU-T Recommendation G.661 (1998): "Definition and test methods for the relevant generic parameters of optical amplifier devices and subsystems". [24] ITU-T Recommendation G.662 (1998): "Generic characteristics of optical amplifier devices and subsystems". [25] ITU-T Recommendation G.712 (1996): "Transmission performance characteristics of pulse code modulation channels". [26] ITU-T Recommendation G.812 (1998): "Timing requirements of slave clocks suitable for use as node clocks in synchronization networks". SIST EN 300 386 V1.3.2:2004

ETSI ETSI EN 300 386 V1.3.2 (2003-05) 10 [27] ITU-T Recommendation G.813 (1996): "Timing characteristics of SDH equipment slave
clocks (SEC)". [28] ITU-T Recommendation G.958 (1994): "Digital line systems based on the synchronous digital hierarchy for use on optical fibre cables". [29] ITU-T Recommendation G.961 (1993): "Digital transmission system on metallic local lines for ISDN basic rate access". [30] ETSI EN 300 127: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Radiated emission testing of physically large telecommunication systems". [31] ITU-T Recommendation O.41 (1994): "Psophometer for use on telephone-type circuits". [32] ITU-T Recommendation O.150 (1996): "General requirements for instrumentation for performance measurements on digital transmission equipment". [33] ITU-T Recommendation Q.552 (1996): "Transmission characteristics at 2-wire analogue interfaces of digital exchanges". [34] ITU-T Recommendation V.10 (1993): "Electrical characteristics for unbalanced double-current interchange circuits operating at data signalling rates nominally up to 100 kbit/s". [35] ITU-T Recommendation V.11 (1996): "Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s". [36] ITU-T Recommendation V.24 (2000): "List of definitions for interchange circuits between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE)". [37] ITU-T Recommendation V.28 (1993): "Electrical characteristics for unbalanced double-current interchange circuits". [38] ITU-T Recommendation V.36 (1988): "Modems for synchronous data transmission using
60-108 kHz group band circuits". [39] ITU-T Recommendation X.24 (1988): "List of definitions for interchange circuits between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) on public data networks". [40] ITU-T Recommendation X.25 (1996): "Interface between Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit". [41] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility. [42] ETSI TR 101 651 (V1.1.1): "Electromagnetic compatibility and radio spectrum matters (ERM); Classification of the electromagnetic environment conditions for equipment in telecommunication networks". [43] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a procedure for the provision of information in the field of technical standards and regulations. [44] ITU-T Recommendation G.996.1 (1999): "Test procedures for digital subscriber line (DSL) transceivers". [45] ETSI TS 101 135 (V1.5.3): "Transmission and Multiplexing (TM); High bit-rate Digital Subscriber Line (HDSL) transmission systems on metallic local lines; HDSL core specification and applications for combined ISDN-BA and 2 048 kbit/s transmission". [46] ETSI TS 101 524-1 (V1.1.1): "Transmission and Multiplexing (TM); Access transmission system on metallic access cables; Symmetrical single pair high bit rate Digital Subscriber Line (SDSL); Part 1: Functional requirements". SIST EN 300 386 V1.3.2:2004

ETSI ETSI EN 300 386 V1.3.2 (2003-05) 11 [47] ETSI TS 101 270-1 (V1.2.1): "Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL); Part 1: Functional requirements". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply. The definitions taken from the IEC 60050-161 [20] have reference in parentheses. AC secondary interface: output port of an AC power supply AC secondary voltage: output of the AC power supply at the AC secondary interface NOTE: The AC secondary voltage may be either: - a stabilized AC supply derived from a DC primary supply (e.g. where the power supply is an inverter); or - derived from the AC primary supply (e.g. a stabilized power supply used where the quality of the primary supply is not sufficient to feed telecommunication equipment). burst (161-02-07): sequence of a limited number of distinct pulses or an oscillation of limited duration connection: temporary association of transmission channels or telecommunication circuits, switching or other functional units set up to provide for the transfer of information between two or more points in a telecommunication network (IEC 60050-714) continuous disturbance (161-02-11): electromagnetic disturbance the effects of which on a particular device or equipment cannot be resolved into a succession of distinct effects DC secondary interface: output port of a DC power supply DC secondary voltage: output of the DC power supply at the DC secondary interface The DC secondary voltage may be derived from the AC primary supply with or without a buffer battery. duration (of a voltage change) (161-08-03): interval of time for the voltage to increase or decrease from the initial value to the final value duration (of a pulse): interval of time between the instants at which the instantaneous value of a pulse reaches 50 % of the pulse magnitude for the first and last time enclosure port: physical boundary of the Equipment Under Test (EUT) through which electromagnetic fields may emanate or on which they may impinge environment, environmental conditions: electromagnetic conditions external to the equipment, to which it is subjected at a certain time The environmental conditions comprise a combination of single environmental parameters and their severity. environmental parameters: present one or more properties of the electromagnetic environment immunity (to a disturbance) (161-01-20): ability of a device, equipment or system to perform without degradation in the presence of an electromagnetic disturbance impulsive disturbance (161-02-09): electromagnetic disturbance which, when incident on a particular device or equipment, manifests itself as a succession of distinct pulses or transients interface "A": terminals at which a power supply is connected to the telecommunications equipment multimedia network equipment: multimedia network equipment containing broadcast and telecommunication functions SIST EN 300 386 V1.3.2:2004

ETSI ETSI EN 300 386 V1.3.2 (2003-05) 12 nominal voltage: nominal value of voltage that designates the type of supply normal service: service mode where telecommunications equipment operates within its specification performance criterion: limits of acceptable behaviour of the equipment during and after the application of the electromagnetic phenomenon NOTE: Performance criteria A apply for continuous phenomena; performance criteria B and C apply for transient phenomena; and performance criteria R apply for resistibility phenomena. port: particular interface of the EUT with the external electromagnetic environment power supply: power source (within the scope of EN 300 386) to which telecommunications equipment is intended to be connected primary supply: public mains or a locally generated AC or DC supply pulse (161-02-02): abrupt variation of short duration of a physical quantity followed by a rapid return to the initial value Radio Frequencies (RF): frequency range above 150 kHz rise time (of a pulse) (161-02-05): interval of time between the instants at which the instantaneous value of a pulse first reaches a specified lower value and then a specified upper value NOTE: Unless otherwise specified, the lower and upper values are fixed at 10 % and 90 % of the pulse magnitude. secondary supply: supply to the telecommunications equipment (e.g. racks or system blocks), derived from the primary supply surge (voltage) (161-08-11): transient voltage wave propagating along a line or a circuit and characterized by a rapid increase followed by a slower decrease of the voltage system block: functional group of equipment depending for its operation and performance upon the secondary power supply telecommunication network: network operated under a licence granted by a national telecommunications authority, which provides telecommunications between Network Termination Points (NTPs) (i.e. excluding terminal equipment beyond the NTPs) tertiary supply: supply to the telecommunications equipment derived from the secondary supply transient (adjective or noun) (161-02-01): pertaining to or designating a phenomenon or a quantity which varies between two consecutive steady states during a time interval which is short compared with the timescale of interest 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ADSL Asymmetric Digital Subscriber Line AM Amplitude Modulation ATM Asynchronous Transfer Mode CPU Central Processing Unit DC Direct Current DLU Digital Line Unit DSL Digital Subscriber Line EMC ElectroMagnetic Compatibility ESD Electrostatic Discharge EUT Equipment Under Test HDSL High bit-rate Digital Subscriber Line LTG Line Trunk Group NTPs Network Termination Points PDH Plesiochronous Digital Hierarchy SIST EN 300 386 V1.3.2:2004

ETSI ETSI EN 300 386 V1.3.2 (2003-05) 13 PRBS Pseudo Random Bit Sequence RF Radio Frequency rms root-mean-square SDH Synchronous Digital Hierarchy SDSL Symmetrical single pair high bit rate Digital Subscriber Line SN Switching Network TLS Test Load Simulator Tr/Th Rise time (10 % to 90 %) and hold time (50 % to 50 %) of transient signal (see EN 61000-4-4) TS Traffic Simulator Upso Voltage measured with a psophometer conforming to ITU-T Recommendation O.41 VDSL Very high speed Digital Subscriber Line 4 Installation environment The installation environments for the equipment covered by the present document are defined in TR 101 651 [42]. The environments defined are either: - the telecommunication centre (major and minor); - locations other than telecommunication centre e.g. within offices, customers' premises, outdoor locations, etc. If no restrictions are specified in the product documentation for the installation environment, the equipment shall comply with the requirements of all environments, implying that the more severe test level shall be used when the test is performed. 5 Immunity: test methods Where reference is made in the present document to specific "test levels" to be used for the tests, it is implicitly required that the EUT shall also fulfil the compliance criteria when tested at "test levels" lower than those specified. This requirement does not apply, however, to tests for immunity to continuous phenomena. Conducted immunity tests shall be applied to one port at a time. Conducted immunity test shall not be applied to the signal ports that, according to the product documentation, are not permanently connected. One signal port of each type found on the equipment shall be tested. If in normal installation practice multi-pair cables (e.g. 64 × balanced pairs) and composite cables (e.g. a combination of fibre and copper) are used, they may be tested as one single cable. Cables bundled for aesthetic or routing purposes are to be tested individually. It ma
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