600 series phone socket nbn
May 2018. Re: replacing old 600/610 phone sockets/plugs for modem connection. In response to sealion1. It is a RJ11 plug which is same size as RJ12 the only difference is the way it is wired. The RJ11 has for contacts wired and RJ12 has six contacts wired. A DSL connection only uses two contacts. 0 Likes. Manufacturer of electrical distribution systems, enclosures, protection & connection, home automation. In just a few minutes you can also subscribe to access Technical Data, which includes installation instructions and technical publications.