3.10.3
DTMF
ENCODING
The
Two-Way Service Option includes 4 different and
distinct methods
of
encoding DTMF signalling tone pairs.
As mentioned previously, the option card is capable
of
encoding DTMF,
1)
Manual with PL, 2) Manual without
PL, 3) Batch with PL and 4) Batch without PL. Begin by
selecting the OPTION position
of
the code synthesizer.
3.10.3.1
DTMF
REAL
TIME
ENCODING-ACCESS
CODE3
3
Press Press
Numeric
Program
Key Key Display Comment
3 3
EJ
4
2
6
EJ
··'34
Current state
of
NV
dFE
dFE4
dFE2
dFE_
dFEP
memory
Now in Real Time DTMF
Encode Mode
Place MOD switch in
CONT and set
Deviation to 3. 3 KHz
Now generating DTMF
Key 2
Place Mod switch in OFF
Place
Mod switch in
BURST. DTMF Key 2
is sent with a tone on
100 mS (default) or per
timing instructions
entered in
User Defined
DTMF Encode mode.
ie. Access Code 3 1
Flashing underscore
Ready to enter special
character DTMF key.
Ready to send
"#"
DTMF key either
continuously
or
for 100
mS. (ie. use
MOD
switch)
NOTE:
If
modulation switch is placed in
"CONT"
tone be
sent continuous
If
modulation switch is placed in
"OFF"
tone will
be sent when digit key is pressed
or
when ENTER
key is pressed. ENTER key is used for special
character tones
of
"*"
and
"#".
If
modulation switch is placed in
"BURST"
the dis-
played digit
is
sent per the default timing ( 100 ms
Tone
ON, 50
ms
Tone Off) or the operator defined
timing parameters
(OPTION CODE 3 1).
NOTE:
Shaded
area
indicates
flashing
digit.
(point
of
data entry)
3.10.3.2
DTMF
BATCH
ENCODER
NO
PL-ACCESS
CODE3
4
Press Press
Numeric
Program
Key Key Display Comment
3 4
I
....
, l
5
I
.....
l
EJ
3 Current state
of
NV
memory
dFE
123
LCD display shows first
three DTMF characters
stored in NV memory
dFE
123 Enter EDIT mode
dFE
123 Moving flashing cursor to
dFE
123
review code stored in
NV memory
= 1234
"dFE"
has now scrolled
off
the LCD display.
= 12345
=
12345-
Reached end
of
stored
code in NV memory
and can
enter
new data
or
backspace using!
<I)
and edit.
= 12345 = Ready to
enter
special
DTMF character
=
l2345F
Have
loaded"*"
DTMF
key into NV memory.
=
l2345F
= Ready to terminate
DTMF EDIT mode.
dFE
123 Stored DTMF code is now
"l2345F"
Place MODULATION
switch in CONT. Entire
sequence
of
12345* is
sent, or
BURST position
to send digits one at a time.
NOTE:
Shaded
area
indicates
flashing
digit.
(point
of
data
entry)
3-13
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