Ericsson 4422 - Manual (Page 110)

Installation
BusinessPhone – Ericsson Dialog 4422 IP Office 110
Installation
Install Cables
The handset cable has to be plugged in “HANDSET”, and the cable
to the local area network has to be plugged in “LAN”. If an external
power adapter is used this has to be plugged in “POWER”. You
can put the cable to the handset in the notch underneath the
telephone. When only one single wall terminal for the local network
is available, a PC can be connected to "PC" to be connected to the
network via the phone.
Change cables
To remove a cable, use a screwdriver to unlock the stop.
Handset cable to the left Handset cable to the right