ISO/IEC 2593:1993
(Main)Information technology — Telecommunications and information exchange between systems — 34-pole DTE/DCE interface connector mateability dimensions and contact number assignments
Information technology — Telecommunications and information exchange between systems — 34-pole DTE/DCE interface connector mateability dimensions and contact number assignments
Technologies de l'information — Télécommunications et échange d'information entre systèmes — Dimensions de branchement du connecteur d'interface ETTD/ETCD à 34 pôles et affectation des numéros de contact
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD
Third edition
1993-03-15
Information technology -
Telecommunications and information
exchange between Systems - 34-pole
DTE/DCE interface connector mateability
dimensions and contact number
assignments
- T6I6communications et khange
Technologies de I’information
Dimensions de branchement du
d’information entre systkmes -
connecteur d’interface ETTD/ETCD a 34 poles et affectation des numeros
de contact
Reference number
ISO/I EC 2593: 1993(E)
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ISO/IEC 2593: 1993(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the Inter-
national Electrotechnical Commission) form the specialized System for
worldwide standardization. National bodies that are members of ISO or
IEC participate in the development of International Standards through
technical committees established by the respective organization to deal
with particular fields of technical activity. ISO and IEC technical com-
mittees collaborate in fields of mutual interest. Other international organ-
izations, governmental and non-governmental, in liaison with ISO and IEC,
also take part in the work.
In the field of information technology, ISO and IEC have established a joint
technical committee, lSO/IEC JTC 1. Draft International Standards adopted
by the joint technical committee are circulated to national bodies for vot-
ing. Publication as an International Standard requires approval by at least
75 % of the national bodies casting a vote.
International Standard lSO/IEC 2593 was prepared by Joint Technical
Committee lSO/IEC JTC 1, Information technology.
This third edition cancels and replaces the second edition
(ISO 2593:1984), o f w h’ IC h certain terms and definitions have been aligned
with those used in IEC. In addition, an informative annex has been added
which specifies passive adaptors for use by a DTE that has implemented
the 34-pole connector for attachment to a DCE that has implemented the
37-pole rectangular ISO 4902 connector or the 15-pole rectangular
ISO 4903 connector instead.
Annex A forms an integral part of this International Standard. Annex B is
for information only.
0 ISO/IEC 1993
All rights reserved. No patt of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
I SO/I EC Copyright Office l Gase Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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INTERNATIONAL STANDARD
ISO/IEC 2593: 1993(E)
Information technology - Telecommunications and
information exchange between Systems - 34-pole
DTE/DCE interface connector mateability dimensions
and contact number assignments
ISO 261 :1973, ISO general purpose metric screw
1 Scope
threads - General plan.
This International Standard specifies the 34-pole con-
ISO 4902:1990, Information technology - Data com-
nector and the assignment of contact numbers at the
munica tion - 37-pole DTE/DCE interface connector
interface between data terminal equipment (DTE) and
and contact number assignments.
data circuit-terminating equipment (DCE) where
CCITTl) Recommendation V.35 or Recommendation
ISO 4903:1989, Information technology - Data com-
X.21 bis together with Recommendation VI0 and
munica tion - 15-pole DTE/DCE interface connector
V.11 are applicable.
and contact number assignments.
NOTE 1 An interoperation between interfaces designed
CCITT Recommendation V.10 (or X.26):1988, Elec-
according to electrical characteristics specified in CCITT
Recommendation V.35 and those specified in CCITT Rec- trical characteristics for unbalanced double-curren t
ommendation V.11 is, at least to a limited degree, possible.
interchange circuits for general use with integra ted
This tan be achieved, for example, by using a passive
circuit equipmen t in the field of data communications.
adaptor which joins the interface connectors in accordance
with ISO 2593 and ISO 4902 or ISO 4903, respectively.
CCITT Recommendation V.11 (or X.27):1988, Elec-
trical characteristics for balanced double-current inter-
This International Standard specifies the dimensions
Change circuits for general use with integrated circuit
of the connector housing and gives recommendations
equipment in the field of data communications.
for the type of locking device (jack-screw System) and
connector shielding.
CCITT Recommendation X.21 :1988, Interface be-
tween data terminal equipment (DTE) and data
circuit-terminating equipmen t (DCE) for s ynchronous
Operation on public data networks.
2 Normative references
CCITT Recommendation X.21 bis:1 988, Use of public
The following Standards contain provisions which,
data networks on data terminal equipment (DTE)
through reference in this text, constitute provisions
which is designed for interfacing to s ynchronous V-
of this International Standard. At the time of publi-
series modems.
cation, the editions indicated were valid. All Standards
are subject to revision, and Parties to agreements
CCITT Recommendation V.28: 1988, ElectricaI charac-
based on this International Standard are encouraged
teris tics for unbalanced double-curren t in terchange
to investigate the possibility of applying the most re-
circuits.
cent editions of the Standards indicated below.
Members of IEC and ISO maintain registers of cur-
rently valid International Standards.
1) International Telegraph and Telephone Consultative Committee.
1
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ISO/IEC 2593:1993(E)
CCITT Recommendation V.35: 1984, Data trans- 3.9 mounting flange: A projection from a compo-
mission at 48 kilobits per second using 60-108 kHz nent for the purpose of attaching the component to
group band circuits.2)3) a rigid surface.
I EC SO(581): 1978, International Electrotechnical Vo-
3.10 (n-pole-)connector: A component which ter-
cabulary - Chap ter 58 1: Electromechanical com-
minates conductors for the purpose of providing con-
ponents for electronie equipmen t.
nection and disconnection to a suitable mating
component.
I EC 807-6: 1988, Rectangular connectors for fre-
quencies below 3 MHz - Part 6: Detail specifica tion
3.11 polarization: Features on mating components
for a range of connectors with size 20 (7.5 A) round
to prevent incorrect mating.
contacts having polarized guides - Fixed solder con-
tact types.
4 Connector specifications
3 Definitions A 34-pole connector shall be provided for the
DTE/DCE interface.
For the purposes of this International Standard, the
Figures 1 to 5 illustrate the 34-pole connector. Only
definitions given in IEC SO(581) apply. For the con-
those dimensions that are essential for mating are
venience of the users of this International Standard,
shown.
the following definitions are repeated.
Figure 1 illustrates the DTE connector which has 34
3.1 cable adaptor: A part of a connector or an ac-
male contacts in a connector housing. Figure 2 illus-
cessory consisting of a rigid housing for attachment
trates the DCE connector which has 34 female con-
to the connector body. lt may incorporate Provision for
tacts in a connector housing. The connector housing
a cable clamp or seal for terminating screens and
on the DTE connector is dimensioned to fit inside the
provide shielding to electrical interference. lt may be
connector housing on the DCE connector (see figures
straight or angled.
1 and 2). Contact identification lettering is also speci-
fied in figures 1 and 2. The use of shields and
3.2 connector housing: The part of a connector into
mounting flanges is illustrated in figures 1 and 2 re-
which the insert and contacts are assembled.
spectively. Since their shape and size is not essential
for mating, the use of different shape and size from
those illustrated does not affect conformance with
3.3 contact arrangement: The number, spacing
this International Standard.
and configuration of contacts in a component.
Figure3 illustrates the dimensions for the contact
3.4 female contact: A contact intended to make
spacing.
electrical engagement on its inner surface and which
will accept entry of a male contact.
Figures 4 and 5 illustrate the dimensions for the male
and female contacts respectively.
3.5 intermateable connectors: Two connectors are
Figures 8 and 9 illustrate the connector mountings.
intermateable when they are capable of being con-
nected electrically and mechanically but without re-
The connectors shall be equipped with a jack-screw
gard to their Performance and intermountability.
System (see figures 6 and 7 and tables 2 and 3) On
the DTE connector, the female jack-screw (nut) shall
3.6 jack-screw System: A device comprising a set
be positioned adjacent to the male contact lettered A
of captive screws and nuts used to couple and un-
and the male jack-screw shall be positioned adjacent
couple mating components. lt may also provide a
to the male contact Iettered MM. Both jack-screws
polarization facility.
of the DTE connector shall be rotateable. On the DCE
connector, the female jack-screw (nut) shall be po-
3.7 locking device: A feature incorporated in certain
sitioned adjacent to the female contact Iettered MM
components to provide mechanical retention of their
and the male jack-screw shall be positioned adjacent
mating part.
to the female contact lettered A. Both jack-screws of
the DCE connector shall be fixed to prevent rotation.
3.8 male contact: A contact intended to make
Connectors shall use either the 6-32 UNC thread in
electrical engagement on its outer surface and which
accordance with the present specification sf
will enter a female contact.
2) Other CCITT Recommendations for group band modems, vim. V.36 and V.37, are available.
3)
In the Melbourne, 1988, version of the V.-series Recommendations, the text of Recommendation V.35 has been replaced
by a note stating CCITT’s intention to withdraw this Recommendation and discourage its use in new equipment.
2
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ISO/IEC 2593: 1993(E)
IEC 807-6 or, if required by national regulations or 4 The male Shell specified in this International Standard
does not contain the optional polarizing pin specified in
mutual user agreement, M 3 as specified in ISO 261.
I EC 807-6.
When procuring equipment internationally which will
use this 34-pole connector, the user shall specify the
5 Assignment of contact letters
thread type in accordance with national requirements.
The assignment of contact letters is given in table 1.
NOTES
2 The nominal contact diameter of 1,6 mm is referred to
6 Connector shielding
as size 16 in IEC 807-7.
Connector shielding is optional. If it is used, e.g. due
3 The first edition of this International Standard did not
to national regulations, etc., it shall be accomplished
specify all the connector dimensions required to ensure
by the use of
mechanical compatibility. As a result, contacts with nominal
diameter of both 1 mm and 1,6 mm and two different ar-
- a metallic male Shell together with a connector
rangements of male Shell and female Shell and different di-
housing and a cable adaptor with a DTE connector;
mensions of jack-screws are now in use in different
countries. This International Standard specifies 1,6 mm or
contacts and the particular arrangement of male Shell and
of female Shell described above; where arrangements occur
- a metallic female Shell with a DCE connector.
which do not conform with this edition, adaptors tan be
necessary.
A polarization pin shall not be used on the male Shell.
Table 1 - Assignment of contact numbers
CCITT
Contact Functionl) circuit Direction
number
A See note 1
B Signal ground or common return 102 common
...
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