AT&T TRIMLINE 210 User Manual page 12

Telephone Does Not Ring
• Make sure the RINGER volume switch is not set
to OFF.
• You may have inadvertently turned off the
ringer. Press
• If there are several other phones on the same
line, try disconnecting some of the other
telephones. Having too many telephones can also
create problems such as low ringer volume or
impaired quality during calls.
PROG/MUTE
11
, # , 6 , PROG/MUTE .