Plantronics CS540A User Manual page 14

If you do not hear a dial tone
1
If you do not hear a dial tone, raise the lifter height switch to the next highest position.
2
Repeat steps 2 to 5 above as necessary until you hear a dial tone.
3
When you hear a dial tone, secure the lifter as described in Steps 6 to 8.
Additional parts (if required)
Use extender arm when the handset lifter needs additional stability lifting and returning
handset to cradle.
Extender arm
1
Slide extender arm onto lifter.
2
Stabilisers can be shifted left and right. Position stabilisers on outside of handset to gently grip
the phone.
Ringer microphone
Use ringer microphone only when the telephone speaker is not located directly under the
handset.
1
Remove cover from ringer microphone jack on back of lifter.
2
Connect ringer microphone plug.
3
Place ringer microphone over phone speaker. Remove adhesive tape and attach.
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