Nat PTA12-300 - Page 7

l*lnat
PTAI2-300
POTS Telephone Adapter with NVIS Display
SM55-3 lnstallation
and Operation Manual
Available Audio
RX Audio
Sidetone
DTMF
Sidetone
Ringer
Audio
Level
Circuitry Type
Ringer Drive
Key
Out
Bidirectional
Sionals
POTS
(2
wire)
On-hook
Condition
DC Voltage
Resistance
Ringing
Condition
lmpedance
Withstands
+70
Vdc max.
10M
to
15M
Ohms
RX audio,
Sidetone,
DTMF
sidetone
Ringing tone
(enabled
or disabled externally)
See RX Audio in the Bidirectional
Signals section for rated output
level
Rated mic
input
yields
rated
phones
output with rated TX
mic
audio set
on
TIP/RING
and both
front
panel
VOL control and
S/T
level
potentiometer
set to max.
-9
dBm
+3
dB into 600 Ohms
14
dBm t2 dB into 600 Ohms with ringer audio
enabled on the
Phones
Output
(RGR
internal
switch set to DOWN) and
2.5 Vrms
setup on
the
Ringer
Audio
Output
Ringer
audio
present
(based
on
ringing
cadence)
2.510.3 Vrms
(typical)
3.610,4 Vrms
(max)
into 600Ohms
Single
Ended
Pulled to Power Ground when ringer is active
(based
on
ringing
cadence)
Open collector,
250m4
max sink current
@
+29
V¿c
Over-current and over-voltage
protected
When Key ln is wired for Hook latching or is tied
to
Power
Ground, this output is
pulled
to Power Ground when the
Hook
Switch is active
Solid state relay
output, optically
isolated, 100m4
max sink
current
@
+28
Vdc
Polarity insensitive and current limited
10k
to 15k Ohms
@
25
Hz
Active
when
ringing signal on tip/ring
>30
Vrms
@
25 Hz
lnactive when
ringing
signalon
tip/ring
<10
Vrms
@25H2
Accepts square or
sinusoidal
ringing functions
Withstands 120 Vrms
(max),
25 Hz sinusoidal ringing function
Section 1 Rev: 1.00
lssue 4
Page
1-3
ENG-FORM: 800-01 14.DOT
CONFIDENTIAL
AND PROPRIETARY TO NORTHERN
AIRBORNE
TECHNOLOGY
LTD.
The document reference is online, please check the correspondence between the online documentation and the printed version.