ISO/IEC 2593:2000

INTERNATIONAL ISO/IEC
STANDARD 2593
Fourth edition
2000-12-15
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
Reference number
©
ISO/IEC 2000
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ii © ISO/IEC 2000 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International 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 committees
collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in
liaison with ISO and IEC, also take part in the work.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
International Standard ISO/IEC 2593 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information
technology, Subcommittee SC 6, Telecommunications and information exchange between systems.
This fourth edition cancels and replaces the third edition (ISO 2593:1993), of which it constitutes a minor revision.
Annex A forms a normative part of this International Standard.
© ISO/IEC 2000 – All rights reserved iii

INTERNATIONAL STANDARD ISO/IEC 2593:2000(E)
Information technology — Telecommunications and information
exchange between systems — 34-pole DTE/DCE interface connector
mateability dimensions and contact number assignments
1 Scope interface connector and contact number
assignments.
This International Standard specifies the 34-
pole connector and the assignment of contact ISO : 19 , Information technology —
numbers at the interface between data terminal
Data communication — 15-pole DTE/DCE
equipment (DTE) and data circuit-terminating
interface connector and contact number
equipment (DCE) where ITU-Tassignments.
Recommendation V.36 or Recommendation
X.21bis together with Recommendation V.10
ITU-T Recommendation V.10 : 1993,
and V.11 are applicable.
Electrical characteristics for unbalanced double-
current interchange circuits operating at data
NOTE 1 An interoperation between interfaces
signalling rates nominally up to 100 kbit/s.
designed according to electrical characteristics
specified in I Recommendation V.36 and those
U
ITU-T Recommendation V.11 : 1996,
a limited degree, possible. This can be achieved, for
Electrical characteristics for balanced double-
example, by using a passive adaptor which joins the
current interchange circuits operating at data
signalling rates up to 10 Mbit/s.
This International Standard the
dimensions of the connector housing and givesITU-T Recommendation X.21 : 1992, Interface
recommendations for the type of locking device between Data Terminal Equipment and
(jack-screw system) and connector shielding. Data Circuit-terminating Equipment for
synchronous operation on public data networks.
2 Normative references
ITU-T Recommendation X.21 bis : 1988, Use
on public data networks of Data Terminal
Equipment (DTE) which is designed for
The following normative documents contain
interfacing to synchronous V-Series modems.
provisions which, through reference in this text,
constitute provisions of this International
ITU-T Recommendation V.28 : 1993, Electrical
Standard. For dated references, subsequent
characteristics for unbalanced double-current
amendments to, or revisions of, any of these
interchange circuits.
publications do not apply. However, parties to
agreements based on this International Standard
T-URecommendation V.36:, Modems
are encouraged to investigate the possibility of
for synchronous data transmission using 60-
applying the most recent editions of the
108 kHz group band circuits.
normative documents indicated below. For
undated references, the latest edition of the
normative document referred to applies.
Members of ISO and IEC maintain registers of
currently valid International Standards.
ISO 261:1998, ISO general-purpose metric
screw threads — General plan.
ISO :19, Information technology —
Data communication — 37-pole DTE/DCE
© ISO/IEC 2000 – All rights reserved 1
89 4902
1988 IT
specifies
and ISO 4902, or ISO 4903, respectively.
/IEC interface connectors in accordance with ISO
ommendation V.11 is, at least to specified in IT -T Rec
TU-T
89 4903
IEC 60050(581):1978, International 3.8 male contact: A contact intended to
Electrotechnical Vocabulary – Chapter 581: make electrical engagement on its outer surface
Electromechanical components for electronic and which will enter a female contact.
equipment.
3.9 mounting flange: A projection from a
:Rectangular connectors for component for the purpose of attaching the
frequencies below 3 MHz – Part 6: Detail component to a rigid surface.
specification for a range of connectors with size
20 (7.5A) round contacts having polarized 3.10 (n-pole-)connector: A component which
guides – Fixed solder contact type.terminates conductors for the purpose of
providing connection and disconnection to a
suitable mating component.
3 Definitions
3.11 polarization: Features on mating
For the purposes of this International Standard, components to prevent incorrect mating.
the convenience of the users of this
International Standard, the following definitions 4 Connector Specifications
A 34-pole connector shall be provided for the
3.1 cable adaptor: A part of a connector or
an accessory consisting of a rigid housing for
attachment to the connector body. It may Figures 1 to 5 illustrate the 34-pole connector.
incorporate provision for a cable clamp or seal Only those dimensions that are essential for
for terminating screens and provide shielding to mating are shown.
electrical interference. It may be straight or
Figure 1 illustrates the DTE connector which
has 34 male contacts in a connector housing.
3.2 connector housing: A part of a Figure 2 illustrates the DCE connector which
connector into which the insert and contacts are has 34 female contacts in a connector housing.
.The connector housing on the DTE connector is
dimensioned to fit inside the connector housing
3.3 contact arrangement: The number, on the DCE con nector (see figures 1 and 2).
spacing and configuration of contacts in a Contact identification lettering is also specified
component. in figures 1 and 2. The use of shields and
mounting flanges is illustrated in figures 1 and 2
3.4 female contact: A contact intended to respectively. Since their shape and size is not
make electrical engagement on its inner surface essential for mating, the use of different shape
and which will accept entry of a male contact. and size from those illustrated does not affect
conformance with this International Standard.
3.5 intermateable connectors: Two
connectors are intermateable when they are Figure 3 illustrates the dimensions for the
capable of being connected electrically and contact spacing.
mechanically but without regard to their
performance and intermountability. Figures 4 and 5 illustrate the dimensions for the
male and female contacts respectively.
3.6 jack-screw system: A device comprising
a set of captive screws and nuts used to couple Figures 8 and 9 illustrate the connector
and uncouple mating components. It may also mountings.
provide a polarization facility.
The connectors shall be equipped with a jack-
3.7 locking device: A feature in corporated in screw system (see figures 6 and 7 and tables 2
certain components to provide mechanical and 3 ). On the DTE connector, the female jack-
retention of their mating part. screw (nut) shall be positioned adjacent to the
male contact letter A and the male jack-
2 © ISO/IEC 2000 – All rights reserved
screw ed
assembled
angled.
DTE/DCE interface.
are repeated.
the definitions given in IEC 60 50(581) apply. For
60807-61988, IEC
specifies 1,6 mm contacts and the particular
shall be positioned adjacent to the male contact
arrangement of male shell and of female shell
MM. Both jack-screws of the DTE
rangements occur which do
shall be rotateable. On the DCE
not conform with this edition, adapto
connector, the female jack-screw (nut) shall be
positioned adjacent to the female contact
lettered MM and the male jack-screw shall be
4The male shell specified in this International
positioned adjacent to the female contact
Standard does not contain the optional polarizing pin
A. Both jack-screws of the DCE
to prevent rotation.
Connectors shall use either the 6-32 UNC 5 Assignment of contact letters
thread in accordance with the present
specification of IEC 60807-6 or, if required by The assignment of contact letters is given in
national regulations or mutual user agreement, table 1.
M 3 as specified in ISO 261.
When procuring equipment internationally which 6 Connector shielding
will use this 34-pole connector, the user shall
specify the thread type in accor dance with Connector shielding is optional. If it is used, e.g.
national requirements. due to national regulations, etc., it shall be ac-
complished by
NOTES
– a metallic male shell to gether with a
connector housing and a cable adaptor with
7.
or
3The first edition of this International Standard did
– a metallic female shell with a DCE
not specify all the connector dimensions required to
ensure mechanical compatibility. As a result, contacts
with nominal diameter of both 1 mm and 1,6 mm and
two different arrangements of male shell and female A polarization pin shall not be used on the male
shell and different dimensions of jack-screws are now
shell.
© ISO/IEC 2000 – All rights reserved 3
in use in different countries. This International Standard
connector.
DTE connector; a
to as size 16 in IEC 60 807-
referred The nominal contact diameter of 1,6 mm is
use of
shall be fixed connector
defined in IEC 60807-6. ed letter
necessary.
be can rs
connector
described above; where ar
ed letter
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