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2.2.1. Braille Audio Feature Pack: Surface lay-out
The ALVA BC640 Braille Audio Feature Pack is designed with an eight-key Braille
keyboard that is located directly behind the 40 cell Braille line. The Braille keyboard
consists of eight Braille keys, a space bar, a Ctrl key, a Windows key, an Enter key
and an Alt key and two integrated high quality stereo speakers that are located at the
left and right of the Braille keyboard. The space bar is the long key that is located at
the centre of the Braille Audio Feature Pack. The eight rectangular keys located at
the left and right of the space bar are the Braille input keys. The four square keys are
the Ctrl key, Windows key, Enter key and Alt key. From left to right the keys are
labeled as Ctrl key, Braille key 7, Braille key 3, Braille key 2, Braille key 1, Windows
key, Enter key, Braille key 4, Braille key 5, Braille key 6, Braille key 8 and the Alt key.
2.2.2. Right Side lay-out
The volume and mute button is located on the right side of the Braille Audio Feature
Pack. Moving the button toward you allows you to turn the volume down and moving
the button away from you will turn the volume up. Pressing the button will mute the
audio, which will generate a low beep. Pressing this button once again will generate
a louder beep and will switch the mute function off. A message will display on the
Braille line to indicate whether or not the mute function is on or off.
2.2.3. Left Side lay-out
The left side of the Braille Audio Feature Pack contains two connectors. From back to
front you will find a 3.5 mm headphone connector and a 3.5 mm microphone
connector.
2.3.
ALVA BC680 Unit
The ALVA BC680 is placed correctly in front of you when the Braille input keys are
located at the back of the flat surface and the thumb keys of the ALVA BC680 Unit
are facing towards you.
The ALVA BC640 Braille Audio Feature Pack contains:
1. 80-cell Braille display
2. eTouch keys (left) for panning left and right and screen reading functions
3. eTouch keys (right) for panning left and right and screen reading functions
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