RTS DSI 2008 2-Wire Call Signal

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4-wire Call Receive
The DSI 2008 receives call signals from the 2-wire system, then converts this to relay contact closure for use as a 4-wire call
receive indication. The DSI 2008 also provides +5 VDC which can be connected to the relay contacts to generate a DC output
signal instead of a contact closure. Connections for a simple contact are shown in Figure 7 on page 14.
2-Wire Call Signal
Call Signal Connections for Audiocom, RTS TW and Clear-Com
The call signals are superimposed on the audio signal, so no separate call signal connections are required. However, make sure
that a call enable switch or jumper is installed for Clear-Com applications as shown in Figure 6 on page1 3 and Figure7.
FIGURE 7. Call signal connections for a 4-wire intercom system other than ADAM, ADAM CS and Zeus.