atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring "RJ" designations?

KUDOS EV607797!!!

Thank you! Thank you!! Thank you!!!

Glad to know I'm not the only one who is regularly irritated by this uneducated simplification of terminology. I can't tell you how many times I've had customers ask for "RJ45" data jacks.

Therein starts the whole education process. 8P8C, 6P6C, 6P4C, 6P2C and 4P4C describes the connector and plug whereas USOC RJ##x or EIA/TIA T568A, T568B, etc., etc. is the wiring topology ("scheme"). The few times a customer was adament about using RJ45's, they soon started second guessing themselves when I told them we required a signed, written specification and that rewiring when it doesn't work would COST $$$!

By the way, I believe a handset 4P4C may be a USOC RJ22.

Thanks "ev", for your post!