To cable the MP-11x FXS Lifeline: 
1.  Connect the Lifeline splitter to Port #1 on MP-11x (the Lifeline splitter is a special order 
option). 
2.  Connect the Lifeline phone to Port A on the Lifeline splitter. 
3.  Connect an analog PSTN line to Port B on the Lifeline splitter. 
Figure  5-9: Lifeline Cabling (Using Splitter Cable) for FXS-Only Devices 
 
  To cable the combined MP-11x FXS/FXO Lifeline: 
1.  Connect a fax machine, modem, or phone to each of the FXS ports. 
2.  Connect an analog PSTN line to each of the FXO ports. 
Figure  5-10: Lifeline Cabling for FXS and FXO Devices