CAT3 Keystone Jack Inserts
Category 3 was a popular cabling format that was used for Voice and Data for years. Cat 3 is currently still in use in two-line telephone systems as Millions of Homes and Offices are still wired with CAT3 for Voice and Technically, the trunk and distribution cable used by the Telephone company to get to your home or office from their Central Office is CAT3 as well.
A Keystone module is an industry standard type of wall jack used in residential and business environments. The system consists of a modular face plate to which jacks are mounted. Flush mount Keystone Wallplates will fulfill the most complicated station installation requirements through a wide selection of snap-in modules. A variety of jacks and connectors will fill the wall plate openings to meet your specific requirements of voice, data, audio, video, fiber optic, etc. The inserts are a snap to install and remove, giving you a highly adaptable system.
A keystone jack module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks such as TV, Phone, LAN, Data, BNC, RCA or optical connectors into a keystone wall plate, surface-mount box, or a patch panel. Keystone modules have a commonly popular standardized rectangular face of 14.5mm wide by 16.0mm high and are held in place with a flexible tab. This allows them to be snapped into or out of a mounting plate with correspondingly-sized rectangular holes, called ports. All keystones, regardless of the type of jack they carry, are interchangeable and replaceable. This is what makes Keystone a popular choice in today's installations at Home or Office. Some keystones use a pass-though type connector, where there is a jack on both the front face as well as the rear side. Others only have a jack on the front and employ a different means for hard-wiring signal cables in the rear, such as a mini 110, insulation-displacement connector, crimp or solder connection.