ISO 4902:1989
Information technology - Data communication - 37-pole DTE/DCE interface connector and contact number assignments
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About This Item
ISO 4902:1989 defines the connector and contact number assignments for a 37-pole DTE/DCE interface used in data communication systems. For engineering teams, test laboratories, and procurement functions, ISO 4902:1989 is useful when evaluating interface compatibility, preparing cable and connector documentation, or verifying equipment integration against a defined communication interface. It supports technical review by clarifying how the connector is identified and how contacts are assigned, which can reduce wiring errors and improve operational consistency in data communication installations.
Overview of ISO 4902:1989
The official title, Information technology - Data communication - 37-pole DTE/DCE interface connector and contact number assignments, indicates a focused technical document for interface standardization between data terminal equipment and data circuit-terminating equipment. Its primary value is in supporting connector identification, pin assignment consistency, and structured engineering documentation. In a compliance workflow, ISO 4902:1989 can serve as a reference point for design validation, technical assessment, and conformity assessment preparation where interface correctness is part of the review scope.
Compliance applications of ISO 4902:1989
Organizations may use ISO 4902:1989 during product evaluation, interface verification, and laboratory evaluation of communication equipment that relies on a 37-pole DTE/DCE connection. It is relevant when preparing technical documentation for procurement, comparing connector implementations across suppliers, or checking that wiring and contact numbering match the expected interface definition. The document can also support testing workflows where repeatable connector assignment is needed for consistent results across engineering validation and acceptance activities.
Importance of compliance with ISO 4902:1989
Conformance with ISO 4902:1989 helps reduce interface mismatches that can affect interoperability, installation accuracy, and troubleshooting effort. Clear contact number assignments are important for quality assurance, especially when multiple teams handle design, assembly, verification activities, or field deployment. Using a stable technical reference also supports risk management and regulatory preparation by providing a common basis for documented evaluation, helping procurement and engineering groups confirm that equipment interfaces are defined in a controlled and auditable way.
- 37-pole DTE/DCE connector identification for data communication interfaces
- Contact numbering reference for wiring, inspection, and technical documentation
- Support for interoperability checks and interface-level verification activities
- Useful in procurement review, supplier comparison, and conformity assessment preparation
- Publication Date: 1989-11-24
- Standard Status: Original
- Publisher: IEC
- Edition: 2
- This Version: ISO 4902:1989 (1989-11-24)
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