Controls On The Back/ The Right - HumanTechnik bTEL II Mode D'emploi

Controls on the back
Ringer volume
slide switch
Controls on the right
Headphone jack
(3,5 mm)
16 English
P T
Tone/ pulse Power jack
dial for the PSU
Headset jack
(2,5 mm)
Telephone cable
socket
Volume control
slide switch
L H
Switch microphone
amplification on/off
Tone control
slide switch