Cord Setup
If you have 2-line phone jacks:
Plug one cord tagged as Line 1+2 into the jack marked LINE 1+2 on the back of the
phone. Plug the other line cord into the jack marked LINE 3+4 on the back of the
phone.
If you have 1-line phone jacks:
Simply plug each single line cord into the corresponding port on the back of the
phone.