Nat PTA12-100, Installation And Operation Manual

Page: 46 / 52

PTA12-100 POTS Telephone Adapter with Display Manual SM55 Rev.
4
.00
If the unit is in Default Power-Up mode when the REDIAL key is pressed, the last
number dialed is shown on the display. To dial this number, first press the HOOK switch
to confirm a dial tone is present, and then press ENTR to send the DTMF tone on the
two-wire interface.
Note : If there are no numbers in the redial buffer, the screen will display
Empty!
and no number will be dialed.
3.3.2.6
Phones Volume ( ▲▼ )
The UP/DOWN arrow button is a momentary digital rocker-switch used to increase and
decrease the phones output volume when the PTA12-100 is in Call mode (i.e. the hook
switch is active), or when the HOOK switch is inactive but the Ringer Detect circuit is active.
The phones output volume increases by pressing the
▲ (up) arrow and decreases with the
▼ (down) arrow. There are a total of 32 steps from min. volume to max. volume, and with
each ▲ or ▼ press, the display indicates the volume level (1 to 32). The display will show
Volume Up
or
Volume Dn
(with the relevant volume level at the right of the display) until
the next operator action.
The UP/DOWN arrow button may be used to adjust the phones volume by one step at a
time by pressing and releasing the key within one second. The level may also be used
to auto-advance by holding down either UP or DOWN for more than one second. In
auto-advance mode the volume steps at approximately 5 levels per second. Once at the
top of the volume range (level 32) the control remains at 32 and does NOT wrap around
to level 1. The same is true for the bottom of the range (level 1). Once at level 1
subsequent presses of the DOWN arrow does not change the level, and wrap around to
level 32 does not occur.
The last value of the wiper is stored in non-volatile memory, and is retained upon power down.
3.3.3 Annunciators
3.3.3.1
HOOK and HOLD Annunciators
The HOOK and HOLD buttons have associated annunciators (see sections 3.3.2.2 and
3.3.3.3).
3.3.3.2 Satcom
Annunciators
The other two annunciators, LNK and SYS, are immediately to the right of the display,
and are green LED 'dead-front' text annunciators. This means that they are not visible
until they are illuminated.
These annunciators are only operational when the PTA12-100 is interfaced to an
STX100 satcom data communications port.
Page 3-4 Sep 21, 2004
ENG-FORM: 806-0106.DOT
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