Muratec MFX-1600 Field Engineering Manual page 191

14.Re-attach two ground wire to the Second phone line module's bottom chassis using the screw. Plug
the connection cable into the P1(IN) connector on the Second phone line module's Modem PCB.
15.Use the four screws to re-attach the second phone line module cover.
16.Plug one end of the telephone line cord into the LINE 2 jack found on the second phone line module.
Plug the other end of the cord into a standard telephone wall jack, just as you would plug in a phone.
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