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1.  Press [MUTE] during conversation. 
  The SP-PHONE indicator on the base unit 
flashes. 
2.  To return to the conversation, press [MUTE] 
again. 
Flash for landline calls 
[FLASH] allows you to use the special features of 
your host PBX such as transferring an extension call, 
or accessing optional telephone services. 
Note: 
•  To change the flash time, see page 117. 
For call waiting service users 
To use call waiting, you must first subscribe with 
your service provider/telephone company. This 
feature allows you to receive calls while you are 
already talking on the phone. If you receive a call 
while on the phone, you will hear a call waiting tone. 
1.  Press [CALL WAIT] to answer the 2nd call. 
2.  To switch between calls, press [CALL WAIT].