You are tasked with replacing the in-wall cabling that carries single-line Plain Old Telephone Service (POTS) circuits in a historic office building. To terminate each telephone line at the wall jack you need the correct modular connectors. Which registered jack should you bring?
RJ-48C
RJ-45
RJ-11
RJ-12
A single analog POTS circuit is terminated on a 6-position, 2-conductor (6P2C) modular connector wiring configuration known as RJ-11. RJ-45 and RJ-48C use the larger 8-position body for Ethernet and T-carrier services, respectively, while RJ-12 employs all six conductors to carry up to three telephone lines. Therefore, RJ-11 is the correct connector to bring for single-line telephone jacks.
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