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iPrimo Speakerphone Station User’s Guide
October, 02 Comdial 133
• If both you and the distant party are using full-duplex
speakerphones, the sensitivity to both echo path changes and
volume reduction during double-talk is doubled from the
sensitivity when just one full-duplex speakerphone is involved.
Half-Duplex Speakerphone Guidelines
The speakerphone user guidelines in this section do not apply when
your speakerphone is operating in full-duplex mode. However, they
are applicable when operating in half-duplex mode or in “speech
training” mode.
• Background noise may prevent the sound-activated switches
from operating properly. Avoid placing the speakerphone where
it will detect sounds from typewriters, keyboards, printers,
paging systems, and other equipment.
• Speak slightly louder than normal and in a clear voice. For the
microphone to best detect your voice, speak within three feet of
it and face the telephone.
• Raising the volume of the loudspeaker makes it easier for the
sound-activated switches in your telephone to select the distant
party’s voice. Lowering the volume of the loudspeaker makes it
easier for the switches to select your voice.
• Since the system takes several seconds to provide the best
switching, constant sound patterns—such as elongating your
words and playing externally-supplied music—may prevent the
sound-activated switches from operating properly.
• Place the telephone on a hard surface and away from table
edges. Do not place the telephone in corners or enclosures. Do
not let obstructions come between you and the microphone.
Rooms with hard, flat surfaces that reflect sound may affect the
sound-activated switches.
• If you are using a handset and the other party is using a
speakerphone, avoid breathing heavily into your microphone.
Avoid other sounds that may affect the distant telephone’s
sound-activated switches.