LT-3100S GMDSS User & Installation Manual Rev. 1.02
Installation and Mounting
Lars Thrane A/S
www.thrane.eu
Page 9 of 71
LT-3120 Handset
The LT-3120 Handset is the primary voice interface for the LT-3100S GMDSS system. The LT-3120 Handset
must be connected on the front of the LT-3110S Control Unit. The connector is illustrated in Figure 2 on
page 6.
The LT-3120 Handset is connected to the LT-3110S Control Unit via a 5-pin proprietary angle connector. The
spiral cord, fixed to the LT-3120 Handset is ~ 0.4 m from handset to connector, when coiled. The spiral cord
can be stretched to a maximum of 2 m. The LT-3120 Handset is designed for indoor mounting. Check the
specifications in
The LT-3120 Handset has the following characteristics:
•
High-performance audio speaker and microphone
•
Separate ringer (buzzer)
•
Speaker volume control (double-button
, marked with ‘+’ and ‘
-
‘, for
volume up and down)
•
Built-in off-hook detection circuit
NOTE
:
The LT-3110S Control Unit will inform the user if the LT-3120 handset is not properly
connected to the LT-3110S Control Unit. The following user information will be showed in
the display “Handset not connected”.
NOTE
:
The LT-3120 Handset must be operated together with the LT-3121 Cradle, for the off-hook
detection circuit to work. The LT-3121 Cradle is described in
on page 10.
Figure 6: LT-3120 Handset (front view).
Figure 7: LT-3121 Handset (backside view).
