SP-1
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should drop out when you speak and return when you are quiet.
8. With S2 (Mute/Hold) pressed IN, you should still hear the dial tone, but the
microphone should not respond to even a loud yell.
9. Turn S1 OFF; this is the equivalent of putting a phone handset back "on the
hook." If everything above checks out, you're ready for your first Speakerphone
conversation. Ask someone to call you. When you hear the ring (on any other
phone), you can answer the call by pressing S1. You should be able to carry on
a normal chat while you are anywhere in an average-sized room. Be aware that
since the speakerphone is switching between "receive" and "transmit" there will
be a short delay or "pumping" effect as you move from talking to listening. Don't
forget to "hang up" when you are finished.
