Guide note · not an individual product specification
The useful distinction
Understand the requirement.
Count housing positions separately from populated contacts, then confirm whether the socket is for a line, handset or other function. [C131A]
Bounded facts, visible unknowns
Specifications and limits
Telephone plugs: positions, contacts and port roles facts and limitations
Documented identification
C2G distinguishes common six-position four-contact and six-contact trade forms from the four-position handset form. [C131A]
Important distinction
C2G distinguishes common six-position four-contact and six-contact trade forms from the four-position handset form. [C131A]
Verified device list
Not included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.
Record the exact device model and the label beside the port. Obtain its manual and the accessory documentation. Keep unknown properties unknown instead of filling them from a visually similar item.
Before you connect
What to check
Separate telephone-line and handset sockets.
Record positions and populated contacts as different facts.
Use the exact device cable documentation; do not test fit in an unrelated port.
This field note does not approve a connection, publish a pinout or provide a measured template. Use the linked source scope and the checklist as a documentation starting point.
AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.
C131ASource checked · pending review
C2G distinguishes common six-position four-contact and six-contact trade forms from the four-position handset form.
Locator: 6-pin RJ-12; 4-pin RJ-11; RJ-22 Access: public page. Trade names are not exact registered-jack wiring declarations. No telephone voltage, line count, crimping or network-speed inference.
Computer-generated illustration with prior AI visual review. Not a photograph, measurement or compatibility check. Independent technical and rights review pending.
Assessment 2026-10-22 · earliest scheduled source review 2027-01-01. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.
Scoped support: 6P6C, common 6P4C trade naming, and the four-position handset form.
Not established / limitations: Trade names are not exact registered-jack wiring declarations. No telephone voltage, line count, crimping or network-speed inference.
Locator: 6-pin RJ-12; 4-pin RJ-11; RJ-22
Trace 1 claims to their source records
C131A · P131
C2G distinguishes common six-position four-contact and six-contact trade forms from the four-position handset form.
Claim scope: Identification and explicitly scoped documentation only; not an end-to-end connection approval
Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.
