JRC Alphatron LT-3100 Iridium, Руководство по установке и эксплуатации

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18 | Installation and Mounting
5.2 LT-3120 Handset
The LT-3120 Handset is the primary voice interface for the Alphatron LT-3100 Iridium. The LT-3120
Handset must be connected on the front of the LT-3110 Control Unit. The connector is illustrated in
Figure 2 on page 16.
Figure 4: LT-3120 Handset (front view)
The LT-3120 Handset is connected to the LT-3110 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 Appendix A: Specifications on page 45.
Figure 5: LT-3121 Handset (backside view)
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-3110 Control Unit will inform the user if the LT-3120 handset is not properly
connected to the LT-3110 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 section LT-
3121 Cradle on page 19.