RTS DSI 2008 Specifications download pdf (Page 18)

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 page 13 and Figure 7.

FIGURE 7. Call signal connections for a 4-wire intercom system other than ADAM, ADAM CS and Zeus.

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RTS DSI 2008 Specifications Page 18