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Talk Only: When you push the button, you talk to the systemdestination port, but there is no “listen” function.
Listen Only: When you push the button, you can hear the source port , but not “talk” to it.
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Talk Only: When you push the button, you talk to the systemdestination port, but there is no “listen” function.
Listen Only: When you push the button, you can hear the source port , but not “talk” to it.
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