
errorsoccurring.Settingthistolowerthan19200hasthepossibilitythattheUART
wont be able to keep up with the modem modulation throughput due to extra DLE escaped
characters.Default:38400.
dtmf_detection_begin [string]: When the line_type is DTMF_PROMPT, this command is sent
to the modem before answering. It should cause the modem to go off hook, emit a prompt tone
if possible and collect and report received DTMF digits. This has the same format rules as the
init_string, plus a / { sequence is translated to a DLE (0x10) character and a /} sequence is
translatedtoaETX(0x03)character.Format:Upto80characters.Default:#CLS=8A.
dtmf_detection_end [string]: This is what needs to be sent to the modem to get it out of the
state that the dtmf_detection_begin put it in. It is sent by the driver when either the 6 second
interdigit DTMF timeout occurs or the dtmf_terminate_digits is received. This has the same
formatrulesasdtmf_detection_begin.Format:Upto80characters.
dtmf_digit_count [dword 0–31]: Max number of DTMF digits to receive. Setting 0 disables
this.Default:0.
dtmf_terminate_digit [string]: The received DTMF digit that causes the driver to terminate
DTMF digit collection being done by the modem by sending the dtmf_detection_end string.
Leave blank to not use a terminate character. Format: 0 or 1 characters, typically # or *.
Default:#.
dtr_toggle_msecs [dword 0–65535]: This is how long to keep the DTR line low during reset or
closesothatamodemwillhangupthelineandreturnanOK.Default:200.
enable_init_flow_control [boolean]: This is for the rare modems that return OK following
ATZ and have CTS low because they are unable to accept another command. This will probably
neverbeusedsinceATZisnotsentforuserinit.Default:false.
get_receive_image_end_ok_timeout_msecs [dword 0–65535]: This is how long to wait
for an OK after receiving the DLE/ETX sequence that terminates a receive image. The modem
will receive the post page signal during this period. When the driver receives the OK, it will send
a +FDR and either start waiting for an image CONNECT if a MPS/EOP was received by the
modem or start waiting for a prephase OK because an EOM was received by the modem.
Default:30000.
get_receive_image_start_connect_timeout_msecs [dword 0–65535]: This is how long to
wait for a CONNECT after sending +FDR. The modem will usually perform its training during this
period. If it returns an OK during this time the driver will assume it has reported a new DCS and
is stepping down its training rate. The driver will reissue the FDR and restart this timeout. If a
modem steps through all training rates without returning new DCS/OK responses, this timeout
would need to be quite large to achieve connection. Smaller values will return control to the
applicationsoonerwhenconnectionsfail.Default:60000.
get_receive_pre_phase_ok_timeout_msecs [dword 0–65535]: This is how long to wait for
an OK while in the initial prephase of a fax receive. When the driver receives an OK it will send
a +FDR. The modem usually exchanges TSI/CSI and DIS/DCS in this time period. Default:
35000.
get_send_image_start_connection_timeout_msecs [dword 0–65535]: This is how long
to wait for a CONNECT after sending +FDT to release the modem to send the TSI/DCS and
perform training. If the modem returns an OK the driver will assume it has received an FTT and
is stepping down to a new baud rate. The driver will reissue the +FDT and restart this timeout.
If a modem steps through all training rates without returning new DCS/OK responses, this
timeout would need to be quite large to achieve connection. Smaller values will return control to
ProprietaryFaxBack,Inc.2014 178
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