Data/voice jack

Cabling-Design.com FREE cabling and networking Helpdesk

	Question by Dave V posted 10 Jul 2007
	Data/voice jack
In my house there is an ON Q legrand system and my Phone jack is actually a rj45 jack connected to the ON Q with CAT5e cable.. with all 8 wires connected on the jack and the terminal in the ON Q... my questuion is: can i use this as-is for phone service or do i need to disconnect some wires on the jack and in the ON Q box... basically woul there be an issue with voltage or somethig to be concerned about, or is it ok to plug in my phone to that jack... as i do not wish to blow up my new house lol... currently i use the connection for data (my PC), but want to use it for voice (phone) from now on... thanks in advance :)
	Answer by Dmitri Abaimov posted 19 Sep 2007
Dear Dave, Go right ahead and plug your RJ11 phone cable into the RJ45 jack. Their pairs #1 coincide in such connection thus providing connectivity for one-line phone. It used to be the case that some lower quality RJ11 would damage pins 1 and 8 in the RJ45 jack but it has been years since I last saw this happening, so you should have no problem with using phone cords in RJ45 jacks. Sincerely, Dmitri Abaimov, RCDD
Click here to see the expert's profile

Back to the current page of questions | Back to all the questions

Back to Cabling-Design.com HELPDESK | Ask your question