GCA70–245

Introducing The LCD Speakerphone

1.2.1Using A Full-Duplex Speakerphone

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. For example, satellite calls or calls with a delay involved may prevent the telephone from operating in full-duplex mode.

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 speakerphone 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 controlling factor, preventing the 8324F-** from operating in full-duplex mode.

When using a full-duplex telephone, you must be aware of these different situations and react accordingly when the far-end party does not respond. However, you will discover it is much easier to interrupt the far-end talker and have a more natural conversation than you can have with a half-duplex speakerphone.

NOTE: Pressing any button (mute, hold, etc.) on the speakerphone while in full-duplex mode causes the system to perform the “speech training” test again. For example, if you press MUTE while in full-duplex mode, when you release the call from mute, the system will perform the entire “speech training” test again.

LCD Speakerphone Reference Manual 1–3

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Vertical Communications DSU and DSU II manual 1Using a Full-Duplex Speakerphone