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Page 470 of 504 Appendix E: M3110, M3310, and M3820 telephones
553-3001-367 Standard 3.00 August 2005
The table below indicates the mode the terminal is in when the speaker key is
operated under the various switch and set operations.
Note 3: CPM is Call Process Monitor which enables the user to hear, for
example, the dial tone in the speaker. Group listening enables the user to
speak through the handset/headset microphone and one or more parties
can listen through the speaker, thus hearing both sides of the
conversation. In Handsfree mode, the user (or group of users) uses both
the handsfree microphone and speaker.
Table 77
Speaker Key Function
MODEL
Handsfree not
selected at the
switch
Handsfree selected
at the switch -
Group listening off
Handsfree selected at
the switch - Group
listening On
M3820 CPM and primary DN
key-Speaker LED is
not illuminated
HF and Primary DN
key - speaker LED is
on when in Handsfree
mode
HF, Group listening and
Primary DN key - speaker
LED is on when in HF or
Group Listening mode
M3310 CPM and Primary DN
key-Speaker LED is
not illuminated
HF and Primary DN
key - Speaker LED is
on when in HF mode
HF, Group Listening and
Primary DN key -
Speaker LED is on when
in HF or group listening
M3110 CPM and Primary DN
key- Speaker LED is
not illuminated
N/A Group listening and
Primary DN key - speaker
LED is on when in Group
listening mode.