Call Waiting Through the use of this feature, customers will never miss an important phone call. How To Use: While on a call, a small beep or distinct tone will alert you of another incoming call. Press the receiver hook or the flash button to answer the second call. When the second call is answered, the first call is automatically placed on hold. To return to the original call, press the receiver hook or the flash button. You may turn off this feature temporarily by pressing *70 before you make a call (rotary users dial 1170).  This feature works only on a per call basis. Note:  This feature is on at all times and is available on all calls whether they are incoming or outgoing.  This feature may interfere with modem use, but can be turned off temporarily as detailed above.