Path: utzoo!telecom-request Date: 21 May 91 03:56:29 GMT From: Julian Macassey Newsgroups: comp.dcom.telecom Subject: Re: Connecting American RJ11 to British CW1311 Reply-To: Julian Macassey Message-ID: Organization: The Hole in the Wall Hollywood California U.S.A. Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 385, Message 1 of 6 Lines: 31 In article fds@cs.man.ac.uk (Fernando da Silva (PW Ph.D.)) writes: > I'm trying to connect an American RJ11 male connector to a British > CW1311 socket, for data communications purposes. > RJ11 jack CW1311 jack > 1- not used 1- not used > 2- black(?) 2- red > 3- red(?) 3- blue > 4- green(?) 4- green > 5- yellow(?) 5- white > 6- not used 6- not used > For most British phone connections only 2 and 5 of CW1311 are > sufficient. Wich are the two important lines on the RJ11? Are all > four lines important for data communications? On the RJ-11 jack, the two center pins (3 - red & 4 - green above) carry the phone line. The ringing signal is also supplied on the "red and green". In the UK, there is a ringing signal on pins 2 and 5 though most UK phones derive ring signal from pin 5 and s signal from pin two connected to pin 3 via a 2uF capacitor. UK extension phones use the capacitor in the jack. US phones have the capacitor in the phone. Julian Macassey, n6are julian@bongo.info.com ucla-an!denwa!bongo!julian 742 1/2 North Hayworth Avenue Hollywood CA 90046-7142 voice (213) 653-4495