AASTRA 6755i Installation Guide EN - Manual (Page 18)

12 Model 55i IP Phone Installation Guide
Installation and Setup
Connecting a Handset or Headset
Handset
Turn the phone over and locate the handset jack marked j. Insert one
end of handset cord into the jack until it clicks into place. Then route the
handset cord through the groove as shown in the illustration below. Attach
the handset to the other end of the handset cord.
Headset (Optional)
Turn the phone over and locate the headset jack marked f . Insert the
headset cord into the jack until it clicks into place. Then route the headset
cord through the groove as shown in the above illustration.
To Handset
To Headset