Panasonic KX-TS4100 Operating Instructions Manual page 11

P Headset jack
Q Volume key ({-} {+})
R {INTERCOM}
INTERCOM indicator
S {TRANSFER}
Memory card:
Remove the memory card
and use it as a name index
for speed dialer or
extensions.
For assistance, please visit http://www.panasonic.com/phonehelp
T {DND} (Do Not Disturb)
DND indicator
U MIC (Microphone)
Preparation
Cover
11