Family terminology

Telephone connector names and aliases

Positions, populated contacts and service role are separate observations; a modular housing alone does not identify the circuit.

3canonical connector forms

13alias entries

1documented shape labels

3engineering profiles

Canonical names and common aliases

Canonical connector	Common names / abbreviations	Shape label	Engineering
6P4C modular plug (often sold as RJ11)	RJ11 · RJ-11 · phone line plug · telephone cord · 6 position 4 contact	modular	Engineering reference →
6P6C modular plug (often sold as RJ12)	RJ12 · RJ-12 · 6 position 6 contact	modular	Engineering reference →
4-position modular handset form	RJ9 handset · RJ10 handset · RJ22 · 4P4C handset · telephone handset plug	modular	Engineering reference →

Related comparison paths

Telephone modular formsPositions, populated contacts and port role are separate observations.Telephone modular versus 8P8CIdentify the housing without inferring a network or telephone function.

Open the full Telephone family reference →

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.