Plantronics Calisto User Manual page 96

DRAFT
There is no dial tone.
Caller ID is not
displaying.
The caller cannot hear
me.
The call has low volume.
Page 42
Check the phone line connection from the base
to the wall phone line jack to make sure they are
properly connected.
Plug another working phone into the same
jack. If there is still no dial tone, check with your
phone service provider for assistance.
If the headset does not have a dial tone but the
handset does, check to see if the headset is
paired with handset properly. Press the Headset
button once and see if the headset icon is
displayed on the handset screen. If the icon is
not displayed, follow the steps in "Pairing with a
new headset" on page 39 to pair your headset
with your handset.
Make sure you subscribe to caller ID service.
Check with your phone service provider.
The incoming call party has caller ID blocking
and is restricting the displaying number.
Check the handset screen to make sure the
handset is not muted.
If you are using the headset, make sure you
have transferred the call to the headset. See
"Switching calls between handset, headset, and
speakerphone" on page 8 for instructions.
Make sure the headset microphone is
pointed toward your mouth for optimal audio
performance.
If you experience low volume on the headset,
increase the volume of the headset. See
"Adjusting call volume using your headset" on
page 12 for instructions.
If volume is low on the handset, increase the
volume of the handset. See "Adjusting call
volume" on page 8 for instructions.