RTS SSA-424A manual Wire Call Signal, Call Signal Connections for Audiocom, RTS TW and Clear-Com

Installation

2-Wire Call Signal

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

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 11 and Figure 7.

Call Signal Connections for Other 2-Wire Communication Systems

Any other 2-wire device must be able to generate and receive a 20 kHz signal superimposed on the audio as follows:

	Balanced Audio Configuration
Pin 1	No Connection
Pin 2	Balanced 20 kHz + Input/Output
Pin 3	Balanced 20 kHz - Input/Output

SSA-424A Signal Specifications for balanced configuration:

SSA-424A Receive: 20 kHz ±100 Hz, 100 mVRMS

SSA-424A Send: 20 kHz ±800 Hz, 500 mVRMS, ±10%

	Unbalanced Configuration 1
Pin 1	20 kHz Common
Pin 2	20 kHz Input/Output
Pin 3	No Connection

	Unbalanced Configuration 2
Pin 1	20 kHz Common
Pin 2	No Connection
Pin 3	20 kHz Input/Output

SSA-424A Signal Specifications for unbalanced configuration:

SSA-424A Receive: 20 kHz ±100 Hz, 100 mVRMS

SSA-424A Send: 20 kHz ±800 Hz, 350 mVRMS, ±10%

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