ZyXEL Communications 2864 Series, User Manual, Page: 186 / 267

16–10
DCE reports this result code when the DCE has determined upon detection of an
answer-tone that the remote station is a data modem. The DCE may also issue this
result code when the DCE has assumed that the remote station has gone off-hook
by actions associated with the
+VRA
and the
+VRN
commands.
The DCE issues the
NO ANSWER
result code when the DCE has continuously de-
tected ringback for the amount of time specified in S-register
S7
.
• ATH (with + FCLASS=8)
This command causes the DCE to hang up the phone. In voice mode, this com-
mand is equivalent to the
+VLS=0
command, and the DCE switches to the data
mode (
+FCLASS=0
) with autobauding, regardless of the state of the
+VNH
com-
mand. When the
+VNH=0
command is in effect and the DCE is not in voice
mode, the
ATH
command behaves as it would for the data mode.
This command does not change any of the voice mode parameters such as
+VSM
,
+VSD
, etc. When the
+VNH=1
or
+VNH=2
command is in effect and the DCE is
not in voice mode, the DCE issues an
OK
result code as a result of the
ATH
com-
mand, but the DCE may or may not go on-hook depending on the setting of the
+VNH
command. As part of the call discrimination algorithm, the DCE may
switch to other modes, such as facsimile or data, in order to try handshakes in these
modes. Voice mode does not support the
ATH1
command.
• AT+FCLASS=<
mode
>
This command selects a DCE mode -- data, fax, or voice. The DCE recognizes the
value of 8 as the Voice Mode.
The DCE returns the
OK
result code if the DCE accepts the command. The DCE
returns the
ERROR
result code if the <
mode
> subparameter is not permitted.
• AT+FCLASS?
The DCE returns the current mode setting followed by the
OK
result code.
<mode> DCE mode
0 Data Mode
1 Fax Mode, Service Class 1 (TIA/EIA-578)
2 Fax Mode, Service Class 2 (TIA PN-2388)
2.0 Fax Mode, Service Class 2.0 (TIA/EIA-592)
6 Fax Mode, ZyXEL Fax AT Commands
8 Voice Mode (TIA IS-101)
Z ZyXEL fax parallel port print and/or DRAM store mode