FIELD GUIDESource-led reference

Alias resolution

DB9, DE-9 and RS-232 naming

Map the common DB9 name to the DE-9 field note while keeping connector naming separate from serial-service assumptions.

Map the name to a canonical record

Canonical recordFamilyNames indexed on that record
DE-9 D-sub (commonly called DB9)Legacy computerDB9 · DE9 · 9 pin serial · RS232 plug
DB25 D-sub connectorLegacy computer25 pin parallel · 25 pin serial · DB-25 · SCSI DB25

Useful side-by-side distinctions

Name boundary.

A D-sub shell or contact count does not by itself identify the electrical interface carried by the exact product.

Browse the complete alias index →

Discovery is not a compatibility verdict.

These discovery surfaces route and reorganize facts already represented in the atlas. They do not add electrical ratings, universal pinouts, measured tolerances, exact-device support, wiring approval or an end-to-end compatibility result.