[PLUG-TALK] Can RJ-11 telephone wires differ?

[Dick Steffens]

On 10/07/2018 01:09 PM, Rich Shepard wrote:
> I bought a VTech CS6719 cordless landline phone to replace the old 2-line
> Panasonic. With the existing phone wire for the business line 
> connected to
> the VTech the handset shows 'out of range'. It still works on the 
> Panasonic.
>
>   Can RJ-11 plugs be wired differently so only the one provided by VTech
> will work on their phone? I've always been able to use anyone's telephone
> line with any phone system so I'm trying to figure out why the new phone
> won't work. Yes, the power is properly connected and I'm using the 
> correct
> signal line (the old residence line has been dead for years.)
>
>   All thoughts on this will be helpful.

If you're talking about the wires behind the jack in the wall, then yes. 
Assuming old 4-wire phone cable, red and green are "line 1" and black 
and yellow are "line 2". Here's a reference:

http://wiki.robotz.com/index.php/Telephone_RJ11_Wiring_Reference


-- 
Regards,

Dick Steffens