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If you are connecting to two 1-line phone jacks using a phone coupler:
If you have 2 single-line wall jacks installed in your home or office, you can use adaptors/
couplers (not included) to combine the 2 single telephone lines into 1 dual lines. The adaptor/
coupler may look similar to the one pictured here and can be purchased from your local
telephone products retailer.
If you are mounting the phone on the wall and connecting to two 1-line phone jacks with two
phone cords:
If you are mounting the phone on the wall and connecting to one 2-line phone jack with one
phone cord:
Line 1
Line 2
Line 1 + 2
Line 1
Line 2