Splicecom PCS 552 - Redial a number; Ring back a caller

PCS 552 User Manual
Basic Call Handling
PCS 552 User Manual v3.2/0312/1 17
Changing the Volume during a call
Hands free volume
If you have answered the call using the Speaker button:
Press the Volume Up or Down buttons as required. The hands free volume will
increase or decrease appropriately.
Handset volume
If you have answered the call using the handset:
Press the Volume Up or Down buttons as required. The volume of your handset will
increase or decrease appropriately.