AT&T EL51209, EL51359 User Manual


Appendix C
I experience poor 
sound quality 
when using the 
• For increased sound quality while using the 
speakerphone, place the handset on a flat surface 
with the dial pad facing up. 
• When using a speakerphone, controlling background 
noise in your environment is essential. While you are 
listening to your party, press MUTE to temporarily 
turn your microphone off. When it is your turn to 
speak, remember to press MUTE again to turn the 
microphone on.
• Excessive background noise will cause a 
speakerphone to fade in and out. Try controlling the 
background noise by turning off any audio devices 
near the speakerphone. Also, try to avoid interrupting 
the person at the other end of the conversation while 
they are speaking. If background noise cannot be 
controlled, you should terminate speakerphone 
operation and return to normal handset mode.
I hear other calls 
while using my 
• Disconnect the telephone base from the telephone 
jack, and plug in a different telephone. If you still hear 
other calls, the problem is probably in your wiring or 
local service. Call your local telephone company.
My cordless 
handset does not 
ring when I 
receive a call.
• Make sure that the ringer is not turned off. Refer to 
Ringer volume on page 9 in this user’s manual.
• Make sure the telephone line cord is plugged securely 
into the telephone base and the telephone jack. Make 
sure the power cord is securely plugged in.
• The cordless handset may be too far from the 
telephone base.
• Charge the battery in the cordless handset for at least 
16 hours. For optimum daily performance, return the 
cordless handset to the telephone base or charger 
when not in use.