EIA-449
E438185
EIA-449 is a telecommunications standard that defines electrical and mechanical interface characteristics for high-speed serial data communication between data terminal equipment and data circuit-terminating equipment.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T4402468 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: EIA-449 Context triple: [X.25, usesPhysicalLayer, EIA-449]
-
A.
IEEE 1532
IEEE 1532 is an extension of the JTAG boundary-scan standard that defines in-system programming and configuration procedures for programmable devices such as FPGAs and CPLDs.
-
B.
IEEE 1196
IEEE 1196 is the IEEE standard that formally defines the NuBus computer bus architecture used in various workstation and personal computer systems.
-
C.
ANSI X3.159-1989
ANSI X3.159-1989 is the original American national standard that formally defined the C programming language.
-
D.
ISO/IEC 8824
ISO/IEC 8824 is the international standard that formally defines the Abstract Syntax Notation One (ASN.1) used for specifying data structures in communication protocols and data representation.
-
E.
EISA
EISA (Extended Industry Standard Architecture) is a 32-bit computer bus standard developed in the late 1980s to provide improved performance and backward compatibility over the earlier ISA bus in personal computers and servers.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: EIA-449 Target entity description: EIA-449 is a telecommunications standard that defines electrical and mechanical interface characteristics for high-speed serial data communication between data terminal equipment and data circuit-terminating equipment.
-
A.
IEEE 1532
IEEE 1532 is an extension of the JTAG boundary-scan standard that defines in-system programming and configuration procedures for programmable devices such as FPGAs and CPLDs.
-
B.
IEEE 1196
IEEE 1196 is the IEEE standard that formally defines the NuBus computer bus architecture used in various workstation and personal computer systems.
-
C.
ANSI X3.159-1989
ANSI X3.159-1989 is the original American national standard that formally defined the C programming language.
-
D.
ISO/IEC 8824
ISO/IEC 8824 is the international standard that formally defines the Abstract Syntax Notation One (ASN.1) used for specifying data structures in communication protocols and data representation.
-
E.
EISA
EISA (Extended Industry Standard Architecture) is a 32-bit computer bus standard developed in the late 1980s to provide improved performance and backward compatibility over the earlier ISA bus in personal computers and servers.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
serial interface standard
ⓘ
telecommunications standard ⓘ |
| alsoKnownAs | RS-449 ⓘ |
| applicationArea |
data communication equipment
ⓘ
modem interfaces ⓘ |
| appliesTo |
data circuit-terminating equipment
ⓘ
data terminal equipment ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| definedBy |
Electronic Industries Association
ⓘ
linked to:
Electronic Industries Alliance
|
| defines |
connector pinouts
ⓘ
electrical interface characteristics ⓘ mechanical interface characteristics ⓘ signal assignments ⓘ |
| domain | serial communications ⓘ |
| fullName |
EIA-449-1
ⓘ
linked to:
EIA-449
|
| governs | interface between DTE and DCE ⓘ |
| improvesOn |
maximum cable length compared to RS-232
ⓘ
maximum data rate compared to RS-232 ⓘ |
| intendedToReplace |
RS-232
ⓘ
linked to:
EIA-232
|
| layer | physical layer ⓘ |
| organizationTypeOfIssuer | industry association ⓘ |
| relatedTo |
EIA-530
ⓘ
linked to:
EIA-449
RS-232 ⓘ
linked to:
EIA-232
RS-422 ⓘ RS-423 ⓘ |
| replacedBy |
EIA-530
ⓘ
linked to:
EIA-449
|
| specifies |
DB-37 connector
ⓘ
DC-37 connector ⓘ control signal functions ⓘ signal grounding requirements ⓘ signal voltage levels ⓘ timing signal characteristics ⓘ |
| standardCategory |
electrical interface standard
ⓘ
mechanical interface standard ⓘ |
| status | largely obsolete ⓘ |
| supports |
asynchronous transmission
ⓘ
synchronous transmission ⓘ |
| useCase | high-speed serial data communication ⓘ |
| uses | balanced signaling ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: EIA-449 Description of subject: EIA-449 is a telecommunications standard that defines electrical and mechanical interface characteristics for high-speed serial data communication between data terminal equipment and data circuit-terminating equipment.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.