User guide

Description
BusinessPhone – Ericsson Dialog 4187 Plus10
14 Headset key
See section “Headset” on page 88.
15 R-key
To make an inquiry, to transfer a call or to establish a conference,
see section “During Calls” on page 27.
Note: Sometimes it is necessary to change the flash time
for the R-key, see section “Flash Time” on page 78.
16 Volume control
To adjust the volume for the handset, headset and loudspeaker.
See section “Handset, Loudspeaker and Headset Volume” on
page 70.
17 Microphone
18 Loudspeaker
19 Prog On/Off switch
To enable or disable the program key. See section “Settings” on
page 69.
20 Message Waiting switch
To switch the Message Waiting indication on or off. Also used to
reverse the polarity in case of crossed line cables. See section
“Settings” on page 69.
21 Data port
To connect a modem, PC or other telephone equipment.
22 Handset with hearing aid function
Please note: The handset may attract and retain small
metal objects in the earcap region.