AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 91)

91 BusinessPhone – Dialog 4187 Plus
Installation
Installation
Install Cables
You can put the cable to the handset in the notch underneath the
telephone. The cable to the exchange has to be plugged in “LINE”
and the handset cable has to be plugged in “HANDSET”.
Note When connecting the telephone to the exchange, it
takes approximately 30 seconds before it is fully
operational.
Change cables
To remove a cable, use a screwdriver to unlock the stop.
Handset cable to the left Handset cable to the right