Nat PTA12-300 - Page 8

l*:nat
PTA12-300 POTS Telephone
Adapter with NVIS Display
SM55-3 lnstallation and Operation Manual
Off-hook Condition
lmpedance
Circuitry Type
DC
Loop Current
DC Voltage
Frequency
Response
Distortion
Audio Noise
Available
Audio
TX Audio
(Mic
lnput
to tip/ring)
RX Audio
(Typ
expected
audio level)
DTMF
Signaling
Frequency Tolerance
Supported Codes
DTMF TX
on tip/ring
SerialPort
Baud
Rate
Frame
Size
Parity
Stop
Bits
Flow
Control
600 Ohms
@1kHz
(nominal)
Balanced
25 mA
(typical)to
130
mA
(max)
<9.0
Vdc
@
25 mA loop current
<3
dB roll-off from
350
Hz
to 3
kHz
<5% THD
<
-50
dB from rated output
(no
signal)
TX Audio, RX Audio
-1
dBm
+1dB
into 600 Ohms with
<5%
THD
(test
conditíon: 250 mVrms
@
lkHz into Mic input, Mic
level
potentiometer
set to max.)
-20
to
0 dBm
400 mVrms
@
lk{z RX audio on TIP/RING
yields
rated
phones
output with both front
panel
VOL control and RX level
potentiometer
set to max.
Standard
DTMF frequencies
used
!1 .5o/o
0-9,.,#
-2.2
d9m f 1.0 dB into 600
Ohms
(DTMF
level
potentiometer
set
to max.)
RS232
protocol,
RX, TX
and GND
I 9200
I bíts
none
1
Not
available
Section
1 Rev: 1.00
lssue4 Page
1-4
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.