Davicom DM336P User manual

Preliminary Order No. DM336P-002-01
Version : DM336P-AT-P04
DM336P
DM336PDM336P
DM336P
AT Command Set & Operation Manual
V.34 Integrated Data/Fax/Voice/Speakerphone
Operation Manual & AT Command Set
DM336P DATA/FAX/VOICE MODEM
Table of Contents
Operation Manual
Installation
Specification
Troubleshooting

AT Command Set
Preliminary 2Order No. DM336P-002-01
Version : DM336P-AT-P04
AT Command Set
Part I : Data command
a. General Command
b. V.42bis / MNP 5 Command
c. Result Code
Part II : Fax Command
a. Fax Class 1 Command
b. Fax Class 2 Command
Part III :Voice Command
a. Voice Command
b. Shielded Command
Part V : S Registers
Operation manual
DM336P provides ISA plug & play function. This
function includes two operation modes. One is Win95
mode. The other one is Jumpless mode. User must
uses DM336P installation program to setup the COM
port when the card is set in Jumpless mode.
Installation
a. Jumpless mode
1. Open the setting jumper.
2. Put modem card in computer’s slot.
3. Execute Comset.exe
4. Move Bar to “Configuration” and press “Enter”
to choose the configuration function
5. Move Bar to “Modify COM port” and press “
Enter” to entry COM port selection mode.
6. Select the COM port and press “ Enter”.
7. Move Bar to “Modify IRQ” and press “Enter” to
enter IRQ selection mode.
8. Select the IRQ and press ”Enter”.
9. Move Bar to “Save Configuration” and press
“Enter” to save your setting in EEPROM.
10. Quit the installation program.
b. Win95 mode
1. Short the setting jumper.

AT Command Set
Preliminary 3Order No. DM336P-002-01
Version : DM336P-AT-P04
2. Put modem card in computer’s slot.
3. Use the “Control Panel” to setup you modem
system.
Specification
!CCITT/ITU/Bell Standard:
V.34+, V.34, V.32bis, V32, V22, V21,
Bell 103, V.17, V.29, V.21ter
!MNP 5, 4, 3, 2
!Host Interface : ISA bus PnP
!Fax Group : Group III
!Fax Command : EIA/TIA-578 Class 2
!Voice Command : Davicom Command
!Escape Command : TIES
!Transmit Level : -12dbm +/- 1dbm
!Sensitivity : -35dbm
!Power : 620mw (Max)
!Temperature : 0 to 55 Degree C
!Dial Tone detection : 340Hz - 550Hz
Troubleshooting
Your modem is designed to provide reliable and
trouble-free operation. However, please follow
the suggest to solve your problems.
Modem does not respond to commands.
1. Using Comset.exe program to set up
Com Port again.
2. Run “Diagnostic” to check you modem
3. Use “AT&F&W&W1” as your initialization
command.
Modem dials but not connect.
1. Make sure the IRQ setting is identical on
both the modem AND the software.
Make sure the Phone line is working properly. A
noisy line will prevent proper modem operation.

AT Command Set
Preliminary 4Order No. DM336P-002-01
Version : DM336P-AT-P04

AT Command Set
Preliminary 5Order No. DM336P-002-01
Version : DM336P-AT-P04
PART I : Data COMMAND SET
General Command
A/ Repeat the last executed AT command
Do not precede A/ with AT or follow with ENTER.
AT Attention Characters.
'AT' character pairs always at the beginning of each command line, except 'A/', which is to repeat the
last executed AT command.
Note: The following commands always have to precede with 'AT' attention character pair, if it is the first
command in the command
line.
AManually answer incoming call.
DDial (Originate a Call).
The following modifiers can be used in the dial string:
0-9,#,* Dialing digits. Touch Tone dial
characters.
P Pulse dialing.
T Touch Tone dialing.
W Wait for second dial tone.
, Pause (programmable by S8).
^ Enable 1300 Hz calling tone.
! Flash (delay 500 ms).
; Return to command mode.
DS=n Dial stored number.
Dials one of three telephone numbers ( n =
0,1 or 2 ) which is stored in the modem's
nonvolatile memory via AT&Zn=x command.
En Command Echo.
E0 Disables command echo.
E1* Enables Command echo.
+++ Default Escape Character.
To switch from data mode to command mode, you can pause one second and type '+++'. Do not follow
with carriage return. The default ASCII character '+' is decimal 43. You can change register S2 to any
value from 0 to 255. Values greater than 127 disable the escape feature and prevent you from returning
to the Command Mode. Please refer to S2 and S12.
Hn Hook control.
H0* Modem is on-hook (disconnect from line).
H1 Modem is off-hook (connect to line).
In Identification.
I0* Display product-identification code.
I1 Factory set.
I2 Internal memory test.
I3 Firmware version 1.
I4 Firmware version 2.

AT Command Set
Preliminary 6Order No. DM336P-002-01
Version : DM336P-AT-P04
Ln Volume Control.
L0 Speaker volume off.
L1 Low speaker volume.
L2* Medium speaker volume.
L3 Loud speaker volume.
Mn Speaker Control.
M0 Speaker off.
M1* Speaker on until carrier detected.
M2 Speaker always on.
M3 Speaker on until carrier detected and off
while dialing.
Nn Auto mode Selection.
N0 Disable auto mode. Modem connect speed is
fixed according to AT*Nn setting.
N1* Enable adaptive connect speed (always
connect at the highest compatible speed).
On Return to Data Mode Selection.
O0* Return to Data Mode.
O1 Return to Data Mode and initiate a retrain.
Qn Modem Response Selection.
Q0* Modem sends responses.
Q1 Modem does not sends responses.
Sr? Reads Register r Value.
r is 0 to 97.
Sr=n Set Register r to Value n.
r is 0 to 97, n is 0 to 255.
Un V.34 Control.
U0 Disable V.34 when AT*N1 - AT*N6.
U1 Enable V.34.
U2 Enable V.34 aggressive connection
Vn Responses Selection.
V0 Numeric responses.
V1* Verbose (text) responses.
Xn Response Set Selection (See table 1).
X0 Report basic call progress result codes.
X1 Report basic call progress result codes and
connections speeds, disable dial tone and
busy tone detection.
X2 Report basic call progress result codes and
connections speeds, disable busy tone detection only.
X3 Report basic call progress result codes and
connections speeds, disable dial tone detection only.
X4* Report all call progress result codes and
connection rate.
Yn Long Space Disconnect Selection.

AT Command Set
Preliminary 7Order No. DM336P-002-01
Version : DM336P-AT-P04
Y0* Disables long space disconnect. Modem
does not send or respond to long space
disconnect.
Y1 Enables long space disconnect. Modem
sends break signal for 4 seconds before
disconnect or will disconnect after receiving
1.6 seconds of break from remote modem.
Zn Reset and Profile Retrieve Selection
Z0* Reset modem and retrieve active
configuration profile from stored
configuration profile 0.
Z1 Reset modem and retrieve active
configuration profile from stored
configuration profile 1.
&Cn Carrier Output Selection.
&C0 Keep Data Carrier Detect (DCD) signal
always ON.
&C1* Set Data Carrier Detect (DCD) signal
according to remote modem data carrier
signal.
&Dn Data Terminal Ready (DTR) Signal Handling.
&D0 Modem ignores the Data Terminal Ready
signal from host.
&D1 Modem returns to Command Mode and
asynchronous operation following an
ON-to-OFF Data Terminal Ready transition.
&D2* Modem hangs up, returns to the Command
Mode, and prepares for asynchronous
operation following an ON-to-OFF Data
Terminal Ready transition.
&D3 Modem resets following an ON-to-OFF Data
Terminal Ready transition and retrieves
modem default configuration (Same as ATZ).
&F Load Modem Factory Default Configuration
Restores the modem to the default operating characteristics.
&Gn Guard Tone Selection.
&G0* Disable guard tone.
&G1 Enable 550 Hz guard tone.
&G2 Select 1800 Hz guard tone.
&Ln Dial-up or Leased-Line Operation Selection.
&L0* Modem is setup for dialup operation.
&L1 Modem is setup for 2-wire leased-line
operation.
&L2 Modem is setup for 4-wire leased-line
operation.
&Pn Make/Break Ratio.
&P0* US setting for off-hook (make) to on-hook
(break) ratio.
&P1 UK and Hong Kong setting for off-hook to

AT Command Set
Preliminary 8Order No. DM336P-002-01
Version : DM336P-AT-P04
on-hook ratio.
&Rn Clear To Send (CTS) Signal Selection.
&R0 Modem turns on the Clear To Send signal
when it detects the Request To Send (RTS)
signal from host.
&R1 Modem ignores the Request To Send signal
and turns on its Clear To Send signal when
ready to receive data.
&R2* Clear To Send force on.
&Sn Data Set Ready (DSR) Signal Selection.
&S0* Data Set Ready is forced on.
&S1 Data Set Ready to operate according to RS-
232 specification.
&Tn Test Selection.
&T0* Terminates test in progress.
&T1 Performs Local Analog Loopback Test.
&V Configuration Profile Display Selection.
&Wn Active Configuration Profile Store Selection.
&W0* Stores active configuration profile in
configuration profile 0.
&W1 Stores active configuration profile in
configuration profile 1.
&Yn Selection of the Active Configuration After
Power-On or Reset.
&Y0* Retrieves configuration profile 0 as the
active configuration profile when the Modem
is turned on or is reset.
&Y1* Retrieves configuration profile 1 as the
active configuration profile when the Modem
is turned on or is reset.
&Zn=x Store Telephone Numbers in Nonvolatile
Memory. Stores three telephone numbers, 31 characters each, in the non-volatile memory.
Uses ATDS=n to dial or to use AT&M2 for
synchronous data mode.
*Gn Adaptive Handshake Selection.
*G0 Disables adaptive protocol handshake.
*G1* Enables adaptive protocol handshake.
*Nn Connect Speed Selection.
*N0 Selects connect speed 1200bps.
*N1 Selects connect speed 2400bps.
*N2 Selects connect speed 4800bps.
*N3 selects connect speed 7200bps.
*N4 Selects connect speed 9600bps.
*N5 Selects connect speed 12000bps.
*N6 Selects connect speed 14400bps.
*N7 Selects connect speed 16800bps.

AT Command Set
Preliminary 9Order No. DM336P-002-01
Version : DM336P-AT-P04
*N8 Selects connect speed 19200bps.
*N9 Selects connect speed 21600bps.
*N10 Selects connect speed 24000bps.
*N11 Selects connect speed 26400bps.
*N12 Selects connect speed 28800bps.
*N13 Selects connect speed 31200bps .
*N14* Selects connect speed 33600bps .
*N15 Selects connect speed 1200/75bps.
*N16 Selects connect speed 300bps (V.21).
*N17 Selects connect speed 300bps (Bell 103).
*Pn User Abort Selection.
*P0* Enables user abort feature.
*P1 Disables user abort feature.
*Qn Auto Retrain Selection.
*Q0 Disables auto retrain.
*Q1* Enables auto retrain.
*Tn Trellis Coding Selection.
*T0 Disables Trellis coding.
*T1* Enables Trellis coding.
*Xn Transmission Level Selection.
*X0* Selects output level -11dBm.
*X1 Selects output level -12dBm.
*X2 Selects output level -13dBm.
*X3 Selects output level -14dBm.
*X4 Selects output level -15dBm.
*X5 Selects output level -16dBm.
*X6 Selects output level -17dBm.
*X7 Selects output level -18dBm.
*X8 Selects output level -19dBm.
*X9 Selects output level -20dBm.
*X10 Selects output level -21dBm.
*X11 Selects output level -22dBm.
*X12 Selects output level -23dBm.
*X13 Selects output level -24dBm.
*X14 Selects output level -25dBm.
*X15 Selects output level -26dBm.
V.42bis / MNP Command Set
%An Set Auto-Reliable Fall Back Character
Set auto-reliable fall back character to n (n
= 0 to 127).
\An MNP Block Size Selection.
\A0 Selected 64-character maximum block size.
\A1 Selected 128-character maximum block size.
\A2 Selected 192-character maximum block size.
\A3* Selected 256-character maximum block size.
\Bn Set Line Break.
Send a n/10 seconds line break to the
modem (n = 0 to 9). Default = 3. Break

AT Command Set
Preliminary 10 Order No. DM336P-002-01
Version : DM336P-AT-P04
length always 300 msec for MNP mode.
%Cn Data Compression.
%C0 Disables data compression.
%C1* Enables data compression.
\En Normal Mode Data Echo Selection.
\E0* Disables data echo during a normal link.
\E1 Enables data echo during a normal link.
\Jn DTE Baud Rate Adjustment Selection.
\J0* Disables DTE rate adjustment. DTE
rate is constant regardless of data link
speed.
\J1 Enables DTE rate adjustment. DTE
matches data link speed
\Kn Break Control Selection.
\K0 Enters the Command Mode, but does not
send a Break to remote modem. (To send a
Break after use the \B command).
\K1 Empty data buffers and immediately sends a
Break to remote.
\K2 Same as AT\K0.
\K3 Immediately send a Break.
\K4 Same as AT\K0.
\K5* Send a Break in sequence with any data
received from host.
\Nn Data Link Selection.
\N0 Selects Normal data link.
\N1 Selects Direct data link.
\N2 Selects MNP Reliable link only.
\N3 Selects MNP Auto-reliable link.
\N4 Selects V.42 reliable link with phase
detection.
\N5* Selects V.42 auto-reliable link with phase
detection.
\N6 Selects V.42 reliable link without phase
detection.
\N7 Selects V.42 auto-reliable link without phase
detection.
\Qn Flow Control Selection.
\Q0 Disables flow control.
\Q1 Selects XON\XOFF in-band flow control.
\Q2 Selects CTS hardware flow control.
\Q3* Selects RTS\CTS hardware flow control.
\Tn Set Inactive Timer.
Set inactivity timer to n minutes (n = 0 to 90
). Default = 0.
\Vn V42/MNP Extended Response Selection.

AT Command Set
Preliminary 11 Order No. DM336P-002-01
Version : DM336P-AT-P04
\V0 Disables V42/MNP extended responses.
\V1* Enables V42/MNP extended responses.
\Xn XON\XOFF Pass-through Selection.
\X0* Process XON\XOFF and don't pass
through.
\X1 Processes XON\XOFF and pass through.
Wn DTE/DCE Speed Response Selection.
W0 Display DCE connection rate
W1* Display DTE connection rate
&Kn Flow Control Selection.
&K0 Disable Local flow control.
&K3* Selects RTS\CTS hardware flow control.
&K4 Selects XON\XOFF in-band flow control.
&K5 Selects Transparent XON\XOFF in-band
flow control.
&Mn Data Connection Selection.
&M0 Selects Direct data link.
&M5* Instructs the modem to make a data
connection using V.42 standard .
Result Code (Table 1)
Long Form Short Form n value in ATXn
0 1 2 3 4
OK 0 x x x x x
CONNECT 1 x x x x x
RING 2 x x x x x
NO CARRIER 3 x x x x x
ERROR 4 x x x x x
CONNECT 1200 5 x x x x
NO DAILTONE 6 x x
BUSY 7 x x
NO ANSWER 8 x x
CONNECT600 9 x x x x x
CONNECT 2400 10 x x x x
CONNECT 4800 11 x x x x
CONNECT 9600 12 x x x x
CONNECT 7200 13 x x x x
CONNECT 12000 14 x x x x
CONNECT 14400 20 x x x x
CONNECT 19200 21 x x x x
CONNECT 38400 22 x x x x
CONNECT 57600 23 x x x x
CONNECT 115200 24 x x x x
CONNECT 1200RX/75TX 25 x x x x
CONNECT 75TX/1200RX 26 x x x x
RINGBACK 27 x x x x
CONNECT BELL 300 28 x x x x
CONNECT V21 29 x x x x
( Display DCE speed by ATW0 )

AT Command Set
Preliminary 12 Order No. DM336P-002-01
Version : DM336P-AT-P04
CONNECT 16800 15 x x x x
CONNECT 19200 16 x x x x
CONNECT 21600 17 x x x x
CONNECT 24000 21 x x x x
CONNECT 26400 30 x x x x
CONNECT 28800 31 x x x x
CONNECT 31200 32 x x x x
CONNECT 33600 33 x x x x
PTT Testing Utilities
%TT00 - %TT 09 DTMF tone dial digits 0 to 9.
%TT0A DTMF digit *.
%TT0B DTMF digit A.
%TT0C DTMF digit B.
%TT0D DTMF digit C.
%TT0E DTMF digit #.
%TT0F DTMF digit D.
%TT10 V.21 channel 1 mark (originate)
%TT11 V.21 channel 2 mark symbol
%TT12 V.23 backward channel mark symbol
%TT13 V.23 forward channel mark symbol
%TT14 V.22 originate (call mark) signal at 600bps
%TT15 V.22 originate (call mark) signal at 1200bps
%TT16 V.22 bis originate (call mark) signal at 2400bps
%TT17 V.22 answer signal (guard tone if PTT require).
%TT18 V.22 bis answer signal (guard tone if PTT require).
%TT19 V.21 channel 1 space symbol.
%TT20 V.32 9600 bps.
%TT21 V.32 bis 14400 bps.
%TT1A V.21 channel 2 space symbol.
%TT1B V.23 backward channel space symbol
%TT1C V.23 forward channel space symbol
%TT30 Silence (on-line), i.e., go off-hook
%TT31 V.25 answer tone
%TT32 1800 Hz guard tone
%TT33 V.25 calling tone (1300Hz)
%TT34 V.25 calling tone (1100)
%TT40 V.23 channel 2
%TT41 V.24 ter 2400 bps
%TT42 V.27 ter 4800 bps
%TT43 V.29 7200 bps
%TT44 V.29 9600 bps
%TT45 V.17 7200 bps long train
%TT46 V.17 7200 bps short train
%TT47 V.17 9600 bps long train
%TT48 V.17 9600 bps short train
%TT49 V.17 12000 bps long train
%TT4A V.17 12000 bps short train
%TT4B V.17 14400 bps long train
%TT4C V.17 14400 bps short train
%TT6R,S,A,P V.34 modulation

AT Command Set
Preliminary 13 Order No. DM336P-002-01
Version : DM336P-AT-P04
R parameter Data Rate (bps)
1 2400 (V.34 only)
2 4800 (V.34 only)
3 7200 (V.34 only)
4 9600 (V.34 only)
5 12000 (V.34 only)
6 14400
7 16800
8 19200
9 21600
A 26400
B 28800
C 31200
D 33600
S parameter Symbol Rate (Baud)
1 2400
2 Reserved
3 2800
4 3000
5 3200
6 3429
A Parameter Auxiliary Channel
0 Disable
1 Enable
P parameter Amount of upper Band Edge Attenua
t
Compensated (dB)
0-9 see ITU - V.34 Figures 1,2 and Table
3,4

AT Command Set
Preliminary 14 Order No. DM336P-002-01
Version : DM336P-AT-P04
PART II : FAX Command
Fax Class 1 Command
+FCLASS=n Data or Fax Mode Selection.
+FCLASS=0 Selects Data mode operation.
+FCLASS=1 Selects Fax Class 1 mode operation.
+FAE=n Data/Fax Auto answer.
+FRH=n Recevie data with HDLC framing.
+FRM=n Receive data.
+FRS=n Receive silence.
+FTH=n Transmit data with HDLC framing.
+FTM=n Transmit data.
+FTS=n Stop Transmit and wait.
Fax Class 2 Command
+FCLASS=n Data or Fax Mode Selection.
+FCLASS=0 Selects Data mode operation.
+FCLASS=2 Selects Fax Class 2 mode operation.
+FAA=n Fax Auto Answer Mode Selection.
+FAA=0 Disables Fax Auto Answer operation
+FAA=1 Enables Auto detection of Data or Fax
operations.
+FBOR=n Phase C Data Bit Order Selection.
+FBOR=0 Selects direct bit order for both Phase C
data and for Phase D data.
+FBOR=1 Selects reversed bit order for Phase C data
and selects direct bit order for Phase D
data.
+FCR= Capability to Receive.
+FCR=0 Indicates the DCE will not receive message
data. Also the DCE will not be able to poll a
remote device.
+FCR=1 Indicates the DCE can receive message
data.
+FDCS=vr, br, wd, ln, df, er, ft, st Set Current
Session Parameter.
+FDCC=vr, br, wd, ln, df, er, ft, st Set DCE
Capabilities Parameters.
+FDIS=vr, br, wd, ln, df, er, ft, st Set Current
Session Negotiation Parameters.

AT Command Set
Preliminary 15 Order No. DM336P-002-01
Version : DM336P-AT-P04
+FDR Receive Data Command.
+FDT Transmit Data Command.
+FLID=”m” Set Local ID String.
'm' is 20 characters numeric string, set by user, to be used in TSI or CSI frame.
+FMDL? Request Model Information.
+FMFR? Request Manufacturer Information.
+FREV? Request Revision Information.
The Fax class 2 mode Result codes are:
OK Command valid and executed successfully.
ERROR Command error and can not be executed.
+FCFR Confirmation to receive prompt.
Modem issues the response when detects an
acceptable TCF training burst and a valid
DCS signal from remote modem.
+FCON Facsimile connection response
Modem issues the response when detects
call progress and fax handshaking is in progress.
+FCSI:'m' Report the called station ID response
Modem issues this after receiving the
remote ID string.
+FDCS:vr, br, wd, ln, df, er, ft, st Report session
parameters response.
+FDIS:vr, br, wd, ln, df, er, ft, st Report remote
capabilities response.
+FET:<ppr> Post page message response
Modem issues this after the end of Phase C
reception, on receipt the post page
message from the transmitting modem.
0 MPS Another page, same parameters
1 EOM Anther document, new page
parameters.
2 EOP No more pages or documents.
+FHNG:m Call termination status response
Modem issues this to indicate the call has
been terminated.
+FPTS:<ppr> Page transfer status response
Modem issues this indicating the copy
quality and related post page message

AT Command Set
Preliminary 16 Order No. DM336P-002-01
Version : DM336P-AT-P04
responses received from the remote modem.
+FTSI: Report remote station ID
Modem issues this after receiving TSI from
calling station.

AT Command Set
Preliminary 17 Order No. DM336P-002-01
Version : DM336P-AT-P04
PART III : VOICE MODE COMMAND SET
Voice Command
#BDR Baud Rate Selection.
#BDR? Returns the current setting of the #BDR.
#BDR=0*Enable autobaud detection.
#BDR=n Where n = 1,2,4,6,8,16,24. Sends OK
message and switches to the new speed
defined by n*2400 bps.
#CID Caller ID Selection.
#CID Returns the current settings of #CID.
#CID=0* Disable Caller ID.
#CID=1 Enables formatted Caller ID reporting Single
Data Message (SDM) and Multiple Data

AT Command Set
Preliminary 18 Order No. DM336P-002-01
Version : DM336P-AT-P04
Message (MDM) packets.
#CID=2 Enables unformatted Caller ID reporting of
any CID packet received after the first
RING cycle including SDM, MDM, or call
waiting packet.
#CLS Data, Fax or Voice Mode Selection.
#CLS? Returns the current setting of the #CLS.
#CLS=0* Selects data mode operation.
#CLS=2 Selects fax class 2 command operation.
#CLS=8 Selects voice mode operation.
#MDL? Request Model Information.
#MFR? Request Manufacturer Information.
#REV? Request Revision Information.
#TL=XXXX Voice Playback Volume Control.
#TL=0 mute, means no volume.
#TL=1 -24db, low volume
#TL=2 -18db
#TL=3 -12db
#TL=4 -6db
#TL=5* -0db
#TL=6 +6db
#TL=7 +12db
#TL=8 +18db, high volume
#VBS Bits Per Sample Selection.
#VBS? Returns the current setting of #VBS.
#VBS=1 Selects 8 bits PCM.
#VBS=2 Selects 2 bits per sample ADPCM.
#VBS=3 Selects 3 bits per sample ADPCM.
#VBS=4* Selects 4 bits per sample ADPCM.
#VBT Beep Tone Timer.
#VBT? Returns the current setting of the #VBT
command.
#VBT=0 Disables the tone generation capability
#VBT=n Sets tone duration time in 100 msec. Where
n = 1-40. Default is 10.
#VCI? Request Compression Method Information.
#VLS Voice Line Selection.
#VLS? Returns the current setting of the #VLS.
#VLS=0* This command causes the telephone line
interface to be routed through the modem.
#VLS=1 This command causes the handset to be
routed through the modem.
#VLS=2 This command routes the speaker through

AT Command Set
Preliminary 19 Order No. DM336P-002-01
Version : DM336P-AT-P04
the modem.
#VLS=3 This command routes the auxiliary input
device through the modem.
#VLS=4 This command is the same as #VLS=0,
except the modem enables the internal
speaker.
#VLS=6 This command enables the microphone and
speaker interface, use for speaker
phone mode.
#VRX Set Voice Receive Mode
This action command is only valid if the
modem is in the on-line voice command
mode.
#VTX Set Voice Transmit Mode
This action command is only valid if the
modem is in the on-line voice command
mode.
Voice mode Result codes
OK Command valid and executed successfully.
ERROR Command error and can not be executed.
VCON Issued in Voice mode (#CLS=8) when the
modem determines that the remote modem
or handset has gone off-hook, or when returning to on-line voice command mode.
NO ANSWER Issued in Voice mode (#CLS=8) when
the modem determines that the remote
modem has not picked up the line after the S7
timer has expired.
CONNECT When Voice transmission by DTE can
begin.
Voice mode Shielded codes
<DLE>0-9 DTMF digits 0 through 9
<DLE>*,# DTMF digits *, #
<DLE>A-D DTMF A through D
<DLE>a Answer Tone detected,V.35/T30 2100Hz
answer tone is detected.
<DLE>b Busy, The busy cadence is detected.
<DLE>c Calling Tone, T.30 1100Hz Calling tone
is Detected.

AT Command Set
Preliminary 20 Order No. DM336P-002-01
Version : DM336P-AT-P04
<DLE>d Dial Tone, The Dial tone is detected.
<DLE>e European Calling Tone, V.25 1300Hz
Calling Tone is detected.
<DLE>f Bell Answer Tone, Bell 2225Hz Answer
tone is detected.