SIST ETS 300 119-4 E1:2006

• Abstract:

  This part of European Telecommunication Standard (ETS) 300 119 details requirements for subracks for use in miscellaneous racks/cabinets, as described in ETS 300 119-3 [4]. The subrack will normally be supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units, etc.

• Status: Published
• Publication Date: 31-Jan-2006
• ICS: 33.050.01 - Telecommunication terminal equipment in general
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2006
• Due Date: 01-Feb-2006
• Completion Date: 01-Feb-2006
• Ref Project: ETSI ETS 300 119-4 ed.1 (1994-01) - Equipment Engineering (EE); European telecommunication standard for equipment practice; Part 4: Engineering requirements for subracks in miscellaneous racks and cabinets

Overview

SIST ETS 300 119-4 E1:2006 is a European standard that specifies engineering requirements for subracks used in miscellaneous racks and cabinets within telecommunication equipment environments. Developed by the Slovenian Institute for Standardization (SIST) in alignment with the European Telecommunications Standards Institute (ETSI), this standard ensures the uniform design, installation, and operation of subracks that house plug-in units and related components. By following the requirements detailed in this part of ETS 300 119, equipment manufacturers and network operators can ensure compatibility, safety, and reliable performance within public telecommunications networks. The standard is integral for aligning with best practices in telecom infrastructure and equipment engineering.

Key Topics

• Subrack Dimensions and Physical Requirements

  • Specifies height, width, and depth (including with equipment/fittings), referencing Annex A for example figures.
  • Ensures subracks fit uniformly in varied rack and cabinet types per ETS 300 119-3.

• Accessibility

  • Mandates front-only access for subracks in 300 mm deep racks, enabling placement against walls or back-to-back.

• Heat Dissipation and Thermal Management

  • Prioritizes natural convection for cooling but allows assisted cooling when necessary.
  • Requires subrack design to protect all components from exceeding allowable temperature limits.
  • Imposes temperature monitoring and verification processes for component reliability.

• Weight Considerations

  • Sets a default maximum weight of 18 kg for unequipped subracks, promoting safe manual handling.
  • Requires suppliers to disclose total weight of fully equipped subracks for use in load calculations.

• Temperature Limits and Safety

  • References EN 60 950 to limit temperature rises of accessible subrack surfaces for personnel safety.

• Electromagnetic Compatibility (EMC) and Electrostatic Discharge (ESD)

  • Enforces compliance with EMC legislation (89/336/EEC Directive) and established standards to manage interference and discharge risks.

Applications

The technical requirements provided by SIST ETS 300 119-4 E1:2006 are applicable in various real-world telecommunications and data center environments:

• Telecommunication Exchanges and Centres
  • Ensures that subracks installed in public network cabinets adhere to safety, compatibility, and thermal standards.
• Network Infrastructure Upgrades
  • Guides manufacturers and installers on retrofitting or updating existing miscellaneous racks and cabinets with compliant subrack solutions.
• Custom and Proprietary Equipment Housings
  • Facilitates integration of different vendors' equipment within standardized racks and cabinets, improving modularity and reducing operational risks.
• Data Centres and Customer Premises
  • Assures that floor loading, heat management, and accessibility remain within carefully defined limits, supporting efficient maintenance and long-term equipment reliability.

Related Standards

For comprehensive compliance and best practices in telecom equipment engineering, the following standards are also relevant:

• ETS 300 119-3: Engineering requirements for miscellaneous racks and cabinets.
• ETS 300 019: Defines environmental conditions and test protocols for telecommunication equipment.
• EN 60 950 (IEC 60950): Covers safety requirements for information technology and electrical equipment.
• Council Directive 89/336/EEC: Addresses electromagnetic compatibility requirements for electronic equipment.
• IEC 917-2 and IEC 917-2-2: Establish interface coordination dimensions and related mechanical structure guidelines for electronic equipment.

By aligning with SIST ETS 300 119-4 E1:2006 and the related standards, organizations can optimize the interoperability, safety, and lifecycle of telecommunication subrack installations within miscellaneous racks and cabinets.

SLOVENSKI STANDARD
01-februar-2006
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Equipment Engineering (EE); European telecommunication standard for equipment
practice; Part 4: Engineering requirements for subracks in miscellaneous racks and
cabinets
Ta slovenski standard je istoveten z: ETS 300 119-4 Edition 1
ICS:
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 119-4
TELECOMMUNICATION January 1994
STANDARD
Source: ETSI TC-EE Reference: DE/EE-3001.3
ICS: 33.080
Equipment, racks, subracks
Key words:
Equipment Engineering (EE);
European telecommunication standard for equipment practice
Part 4: Engineering requirements for subracks in miscellaneous
racks and cabinets
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1994. All rights reserved.
New presentation - see History box

Page 2
ETS 300 119-4: January 1994
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

Page 3
ETS 300 119-4: January 1994
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Dimensions for subracks.7
4 Accessibility.7
5 Heat dissipation.7
5.1 Subrack heat management.7
5.2 Component temperature.8
5.3 Miscellaneous rack/cabinet thermal planning.8
6 Weight .8
6.1 Unequipped subrack.8
6.2 Equipped subrack .8
7 Temperature limits .8
8 Electromagnetic compatibility and electrostatic discharge requirements.8
Annex A (informative): Illustrative figures.10
Annex B (informative): IEC Sub Committee 48D publication.12
History.13

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ETS 300 119-4: January 1994
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ETS 300 119-4: January 1994
Foreword
This European Telecommunication Standard (ETS) has been produced by the Equipment Engineering
(EE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS is part 4 of a 4 part ETS aimed at setting out, on a common basis, the engineering requirements
for telecommunication practice, for housing equipment forming part of a public telecommunications
network. Part 1 is a general introduction and explains the terminology used, Part 2 specifies the
engineering requirements for racks and cabinets and Part 3 specifies the engineering requirements for
miscellaneous racks and cabinets. This part, Part 4, specifies the engineering requirements for subracks
mounted in miscellaneous racks and cabinets.
This ETS applies to all telecommunications equipment forming part of the public telecommunications
network. The requirements for subracks mounted in miscellaneous racks/cabinets, which this part lays
down, are based on the work of IEC Technical Committee 48D. However, in this part of the ETS deviation
from the work of IEC Sub Committee 48D occurs (see Annex B).
Illustrative figures are contained in Annex A.

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ETS 300 119-4: January 1994
Blank page
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ETS 300 119-4: January 1994
1 Scope
This part of European Telecommunication Standard (ETS) 300 119 details requirements for subracks for
use in miscellaneous racks/cabinets, as described in ETS 300 119-3 [4]. The subrack will normally be
supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units,
etc.
2 Normative references
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated referenc
...