ISO 2110:1989/AMD1:1991

ISO 2110:1989/AMD1:1991 defines an amendment to the 25-pole DTE/DCE interface connector and contact number assignments, with a specific focus on interface connector and contact numbering for data signalling rates above 20 000 bit/s per second. For engineering teams, procurement specialists, and compliance reviewers, ISO 2110:1989/AMD1:1991 helps clarify how the parent document is modified for higher-speed data communication use cases. It is relevant where connector identification, interface compatibility, and documented evaluation are part of the technical review process.

Overview of ISO 2110:1989/AMD1:1991

This amendment is a supporting technical reference to ISO 2110:1989, not a standalone primary specification. Its role is to update the connector and contact number assignments associated with a DTE/DCE interface for data signalling rates above 20 000 bit/s per second. That makes it useful when reviewing interface definitions, validating equipment compatibility, or maintaining engineering documentation for communication systems. In practice, ISO 2110:1989/AMD1:1991 supports technical assessment and operational consistency where higher-speed serial interface arrangements must be interpreted correctly.

Compliance applications of ISO 2110:1989/AMD1:1991

Organizations may use this amendment during conformity assessment, product evaluation, and verification activities for data communication equipment that relies on a 25-pole DTE/DCE connector arrangement. It can be relevant in laboratory evaluation, interface validation, and procurement review when teams need a clear compliance reference tied to the parent standard. ISO 2110:1989/AMD1:1991 is especially useful for documenting connector pin assignment expectations in engineering documentation and for aligning testing workflows with the intended interface behavior at higher signalling rates.

Importance of compliance with ISO 2110:1989/AMD1:1991

Using the amendment alongside the parent standard helps reduce implementation risk by improving connector consistency and supporting interoperable interface design. For quality workflows and regulatory preparation, it provides a defined point of reference when checking contact assignments, reviewing technical drawings, or confirming equipment compatibility. ISO 2110:1989/AMD1:1991 also supports testing consistency by giving engineers and laboratories a common basis for validation, which can help avoid integration errors and strengthen procurement and conformity assessment decisions.

• Amendment to the parent reference ISO 2110:1989 for higher-speed data interface use
• Clarifies connector and contact number assignments for a 25-pole DTE/DCE interface
• Useful for engineering review, interface validation, and documented evaluation
• Supports compliance workflows, procurement checks, and laboratory testing consistency