RJ14C 6-Pin Modular Patch Cord, Two-Line

Overview

An rj14c 6 pin modular patch cord carries two telephone lines on a six-position modular plug: one pair on the center pins, the second pair outside it. It is a voice and low-voltage signaling cord, not a network cord, and it is still specified every day on PBX cross-connects, alarm panels and nurse-call systems that have been in service for twenty years. We build it to the pairing and length on your drawing.

Key Specifications

Type	Modular patch cord, 6-position
Wiring	RJ14C two-line arrangement
Pair 1	Pins 3-4, center
Pair 2	Pins 2-5
Conductor	24 AWG stranded twisted pair
Connector	6-pin modular plug both ends
Length	Approx. 4 in standard; OEM build to order
Application	Telephone, PBX cross-connect, alarm signaling

What the RJ14C code actually means

The RJ prefix comes from the registered jack series, and the suffix letter is the wiring arrangement rather than the plug shape. All of these use the same 6-position modular body; only the number of conductors actually terminated changes.

Code	Positions / conductors	Lines	Common use
RJ11C	6P2C	1 line	Single handset lead, modem lead
RJ14C	6P4C	2 lines	Two-line desk sets, PBX jumper, this build
RJ25C	6P6C	3 lines	Three-line sets, older key systems
RJ45S	8P8C	Data	Ethernet; a different family entirely

The registered jack designations are industry-general: they describe the wiring, not a performance grade. What your cord is wired to is what appears on the order, and we verify it pin by pin.

Pin assignment

On the standard two-line arrangement the first line sits on the center pair and the second line wraps outside it, which is why a one-line plug still works in a two-line jack.

Pin	Line 1	Line 2	Note
1	–	Tip 2	Outer, may be unpopulated
2	–	Ring 2	Second pair
3	Tip 1	–	Center pair, first line
4	Ring 1	–	Center pair, first line
5	–	Tip 2 spare	Depends on the scheme
6	–	–	Usually not populated

There are several conventions in the field and they are not all the same. If your equipment follows a variant, send the pinout — we wire to your drawing, not to a chart.

Where 6-pin modular cords are still specified

PBX and key-system cross-connect frames
Two-line desk phones and fax machines still in service
Alarm and security panels with a legacy line interface
Nurse-call and assisted-living signaling loops
Elevator and building intercoms
Bench and service leads for telecom test sets

Why these cords are usually short

A cross-connect jumper only has to cross a frame, so four inches is a normal length and five meters is unusual. Short is also mechanically kinder: a 6-position plug has no latch guard worth speaking of, and a long cord hanging off a frame puts all its weight on the contacts. If you need length, ask for a strain relief boot and a jacket rated for where it will actually sit.

Typical applications for this rj14c 6 pin modular patch cord

Telephone cross-connect and distribution frames
Two-line handset leads for reception and dispatch desks
Service leads for line test sets on a bench
Alarm dialer and panel line cords — for building cable see our Nurse Call Button Cable with 6P4C Plug
Legacy POS and terminal leads, alongside the Coiled Telephone Handset Cable

How to specify your build

Number of conductors — 2 or 4, and whether positions 1 and 6 are populated.
Pinout — send it if it differs from the standard two-line arrangement.
Length, including the frame or wall path.
Cable — stranded twisted pair for jumpers; the spec reference is on your drawing.
Jacket and color — gray or ivory is typical; other colors on request.
Quantity and packaging: one per bag, or bulk.

Workmanship and testing

Assembly and inspection follow IPC/WHMA-A-620 Class 3 workmanship criteria under our ISO 9001 quality management system, and every unit is 100% continuity and pinout tested before it is packed. Conductor range is 32 to 12 AWG. Pinout and continuity are verified on every unit against the scheme on the order. Where a standard sets a limit for the category, the connector interface or the jacket, that is the industry-general definition of the rating. The values your assembly is built and verified to are the ones stated on your drawing, per order.

Material declarations against RoHS and REACH are issued per project, alongside the dimensional and electrical reports agreed at quotation; see certifications, compliance and material declarations. Where your drawing names a UL style or another approval, the build follows your drawing and ships with the supporting document rather than a claim of our own. Production runs on the same lines described under the assembly lines behind this build, where cutting, termination, molding and 100 percent electrical verification sit under one roof. Related reading: what automation programs ask for. Tooling for this build is cut in our own tool room and belongs to your program, so a repeat run years later starts from the same tool.

Custom builds and ordering

Short jumper runs are a fast build — a photo of the existing cord is usually enough to start. Prototype builds start from 1 to 50 pcs and ship in 3 working days; production orders start at MOQ 500 pcs and ship 14 working days after approval. New tooling adds about 10 working days, and we hold 100 sets of mold tooling in house. OEM and ODM builds ship under your part number and labeling, with material certificates and first-article reports on request. Factory audits and video line tours of our Longgang, Shenzhen plant can be arranged through Alan Kang.