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Cat3 (RJ-11) 6P4C type insert for use with keystone panels/outlet faceplates,Simply snap into place in a keystone panel (not included) & connect desired cables | Sturdy construction for optimum signal transmission
Plug-in design: this coupled CAT3 telephone line interface can be inserted into most standard size blank wall plates , such as CAT6 ethernet panel, speaker panel and other panels, etc.
CAT3 phone jack: the CAT3 is applied to connect two telephone lines; The RJ11 6P4C interface is compatible with most RJ11 devices such as landline, fax or answering machines

PARAMETERS -A pack of 40 RJ11 (6P2C) modules plug, suitable for voice communication, two pins, transparent colour, the length is13.30±0.2mm. Compatible with both solid and stranded wire.
COMPATIBILITY – Phones, modems, answering machines, fax machines, routers, caller ID’s, and more, this connector can be applied to telephone lines and widely used in home or office cable systems.
PERFORMANCE – Modular jack has PC housing with pins purity of copper wire higher than 99.99% for Fast and accurate data transmission. 3 Micron gold plated pins provide better contact and transmission performance. Extremely high-quality module plugs.

Kindly refer the product description before buying the product.
Model: RJ45 to RJ11.
Extension cord with a modular plug on one end and modular female connector on the other end.