Merlin 3070 Service And Maintenance Manual page 17

OPTIONAL EQUIPMENT
In addition to the essential components of the MERLIN communications system, several
different accessories may be connected to voice terminals or the control unit.
Optional Voice Terminal Accessories
Hands-Free Units, Headset Adapters, and Multipurpose Adapters can be connected directly to
the underside of the voice terminal, illustrated below. A Voice Terminal Power Supply can
also be connected to a voice terminal and an ac outlet.
Line jack: Connects to control unit
via modular voice terminal cord.
This jack is not to be used for
voice terminal accessories.
"Other" jack: Connects to
optional voice terminal accessories
via voice terminal accessory cord.
This jack is usually covered by an
adhesive-backed paper label.
Hands-Free Unit (HFU)
The Hands-Free Unit provides speakerphone capability, making it possible to place and
receive outside and intercom calls without using the voice terminal handset. The HFU, shown
below, can be used with 10-button or 34-button voice terminals.
Voice terminal accessory cord:
Connects to "Other" jack on voice
terminal.
Speakerphone light: Lights when
speakerphone is in use.
Speakerphone switch: Turns unit
on and off.
Microphone light: Goes on when
microphone is in use.
Volume control
Microphone switch: Turns
microphone on and off for "mute"
function.
CIB 2864
15