Find sources: "Modular connector"– news · newspapers · books · scholar · JSTOR ( May 2023) ( Learn how and when to remove this template message) line series connection using 50-pin connector (with bridging adapter) ahead of customer equipment. Mostly used for call sequencer equipment. In analog mobile telephony, the 8P8C connector was used to connect an AMPS cellular handset to its (separate) base unit; this usage is now obsolete. IEC 60603-7-7: Connectors for electronic equipment: Part 7-7: Detail specification for 8-way, shielded, free and fixed connectors, for data transmissions with frequencies up to 600MHz

The most common uses of the 10P10C connector are in proprietary data transfer systems, [25] such as the Digiboard [26] and Equinox Systems' Super-Serial multi-port TIA-232 adapters. [26] 10P10C connectors are also used to implement RS-485 interfaces, and for data link connections in uninterruptible power supplies. connectors are commonly used in computer networking applications, where interconnecting cables are terminated at each end with an 8P8C modular plug wired according to TIA/EIA standards. Most wired Ethernet communications are carried over Category 5e or Category 6 cable terminated with 8P8C modular plugs. The connector is also used in other telecommunications connections, including ISDN and T1.RJ45 is often incorrectly used when referring to an 8P8C connector used for ANSI/TIA-568 T568A and T568B and Ethernet. It is distinct from the official RJ45S and ARJ45 interfaces.

IEC 60603-7-1: Connectors for electronic equipment: Part 7-1: Detail specification for 8-way, shielded free and fixed connectors with common mating features, with assessed quality Trulove, James (December 19, 2005), LAN wiring (3rded.), McGraw-Hill Professional, ISBN 0-07-145975-8 . RJ11 is 4P4C wiring standard and 6P4C wiring standard which means it has 6 positions with 4 conductors.

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IEC 60603-7-5: Connectors for electronic equipment: Part 7-5: Detail specification for 8-way, shielded, free and fixed connectors, for data transmissions with frequencies up to 250MHz