Plantronics CS540 User Guide - 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 through 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 though 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 Stabilizers can be shifted left and right. Position stabilizers on outsides of handset to gently grip the phone. 2 1 2 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. 1 3 2 14