Phone cable going to my white Jack on my BGW210 router

That's a standard "satin" flat phone cable with RJ11 ends.

I bought a RJ11 6P4C - cable and the router's Green Phone Light never came back on.

I put the old cable back and the light still did not go back to GREEN.

I had to go to the AT&T Troubleshooter web page to test the phone connection, then it went to GREEN again.

I only have one phone line that I am using  and I read this router supports 2 phone lines.

Should the RJ11 6P4C   (four WIRES)  still work or do I need to purchase a RJ11 6P6C (6 WIRES).

I did not use the AT&T Troubleshooter web page to test the RJ11 6P4C cable , I just assumed it wasn't compatible?

The 4 connector cable should work, make sure you're plugging into the correct jack. 

The cable I purchased now works fine??  I must have had other router issues previously. Thanks for the help.