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2.  Press and hold the headset/belt pack Talk switch and speak into the headset microphone.   
3.  Adjust the DAY
 menu sign audio level control for the desired audio level at the menu sign (clockwise to 
increase; counterclockwise to decrease.) 
4.  Move the DAY/NIGHT switch on the base station to the NIGHT position. 
5.  Press and hold the headset/belt pack Talk switch and speak into the headset microphone.   
6.  Adjust the NIGHT
 menu sign audio level control so that the audio level at the menu sign is slightly lower than 
the DAY audio level setting (clockwise to increase; counterclockwise to decrease.)