Sony DSX-A50BT Operating Instructions Manual page 22

Calling by redial
1 Press  and rotate the control
dial until "REDIAL" appears, then
press it.
The phone call starts.
Operations during a call
Presetting the volume of the ringtone
and talker's voice
You can preset the volume level of the
ringtone and talker's voice.
To adjust the ringtone volume:
Rotate the control dial while receiving a call.
Ringtone volume can be adjusted.
To adjust the talker's voice volume:
Rotate the control dial during a call. The
talker's voice volume can be adjusted.
Note
If the Bluetooth Phone source is selected, rotating
the control dial will only adjust the talker's
volume.
Mic gain adjustment
You can adjust the volume for the other
party. Press  (MIC) to adjust the volume
levels ("MIC-LOW," "MIC-MID," "MIC-
HI").
EC/NC Mode (Echo Canceller/Noise
Canceller Mode)
You can reduce echo and noise.
22
Press and hold  (MIC) to set to "EC/
NC-1" or "EC/NC-2."
Call transfer
You can switch between talking handsfree
(via this unit), or by the cellular phone.
Press  or use your cellular phone.
Notes
• For details on cellular phone operation, refer to
your cellular phone manual.
• Depending on the cellular phone, handsfree
connection may be cut off when call transfer is
attempted.
Preset dial
Contacts in the phonebook can be stored in
the preset dial (up to 4 on the main unit, or
6 on the remote commander).
1
Select a phone number that you want to
store in the preset dial, from the
phonebook, call history* or by
inputting the phone number directly.
The phone number appears in the
display of this unit.
* For the call history, you can also select from
the caller name. In this case, the caller name
appears in the display of this unit.
2
Press and hold a number button (
to  on the main unit, or  to 
on the remote commander) to select
the preset number to store until
"MEM" appears.
The contact is stored in the selected
preset number.