Siemens ROLMphone 120 Series User Manual page 160

S
speaker. A device used to convert varying electrical signals into sound. A
loudspeaker (receiver) associated with a telephone that permits the user to dial
telephone calls and to listen to telephone calls without lifting the handset.
However, the user must pick up the handset to talk.
speakerphone. A microphone (transmitter) and loudspeaker (receiver)
associated with a telephone that permits the user to dial telephone calls and to
both listen and talk without lifting the handset.
status light. A light-emitting diode (LED) located next to every feature key
and line key on ROLMphone telephones, which indicates the state of that
feature or line. For example, the status light flashes next to the line key that is
on hold.
system feature. A feature of the communications server system that is
available to all users.
T
trunk. A telephone line between a PBX and a local Central Office (CO).
Trunks are used when calling local or long distance numbers outside of your
company's telephone system.
G-4 ROLMphone 120/240/400 Series User Guide