Nat PTA12-100, Installation And Operation Manual

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PTA12-100 POTS Telephone Adapter with Display Manual SM55 Rev.
4
.00
3.3 Controls and Indicators
Brightness = 5
3.3.1 Display
The PTA12-100 has a 16-character LED display, with each character block consisting of
a 5x7 pixel matrix. Display features depend on the status of the unit, and will be
discussed in the relevant sections.
3.3.1.1 Display
Brightness
The front panel BRT key controls display brightness. Each time the BRT key is pressed,
the display brightness increases by one step. In Default Power-Up mode only, the
display will show the current brightness level (1 - 8) until the next operator action. Once
the maximum brightness (8) is reached the brightness level wraps around the lowest
setting (1).
The display is dimmed to half brightness upon activation of the front panel backlighting.
3.3.2 Keypad Controls
The keypad controls are silicone rubber tactile push-buttons backlit by amber LEDs, and
are used to manage all the operator functions of the PTA12.
3.3.2.1
Number and Symbol Keys
The number (0 - 9) and symbol (
½
, #) buttons on the keypad have different uses
depending on the selected mode. Full information will be given in the relevant sections
and in the keypad function table in section 3.6.
3.3.2.2 HOOK
The HOOK button is pressed to initiate or receive a call. This corresponds to lifting the
handset of a telephone ‘off the hook’. Each time the HOOK button is pressed, the hook-
switch toggles on / off.
Page 3-2 Sep 21, 2004
ENG-FORM: 806-0106.DOT
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