Comdial and FXT, Attendant Manual

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Speakerphone
Characteristics
When using your speakerphone, the microphone and loudspeaker are farther
away from you than when you use a handset. Both the signal from the loud-
speaker and the signal to the microphone must be strengthened.
When microphones and loudspeakers are close together (such as in a speaker-
phone), additional amplification typically generates a ringing sound (public ad-
dress systems do this if the volume is too high or the microphone is too close to a
loudspeaker).
Full-Duplex Speakerphone Characteristics
The Impact SCS 8324F-** speakerphone uses the latest full-duplex speakerphone
technology. (Full-duplex technology enables both parties on a speakerphone call
to speak simultaneously—half-duplex speakerphones allow only one person to
speak at a time.) The 8324F-** will operate in either full-duplex or half-duplex
mode depending on the current line conditions.
At the beginning of each call the telephone must perform a “speech training” test.
To achieve optimum performance from the full-duplex speakerphone, Comdial
recommends that each user in turn speak about 10 consecutive words to allow the
telephone to “train” itself. Note that during the “speech training” test, the speak-
erphone is operating in half-duplex mode.
Depending on the telephone line conditions and the type of speakerphone at the
other end, it may not be possible for the 8324F-** to operate in full-duplex
mode. If the speakerphone at the other end is a half-duplex speakerphone and
both parties are in speakerphone mode, the half-duplex speakerphone is the con-
trolling factor, preventing the 8324F-** from operating in full-duplex mode.
Attendant Manual 129
GCA70-250 Speakerphone Characteristics
C