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Chapter 9 - Fax Operation
9-13
Response Value Function and Description
parameters.
+FTI:
"TSI ID string"
Remote ID response-Transmit Station ID
(TSI).
+FVO Report transition to voice.
Extended Fax AT Command Set
Extended Fax AT Commands are unique to ZyXEL modems. The computer
controls the modem through a set of extended fax AT commands and the modem
responds with a set of status report result codes. During data state, compressed
fax image data is flowing between the modem and computer. The default serial
connection speed is 38400 bps, and it is higher than the fax link rate. CTS/RTS
hardware flow control is used to regulate the data flow.
The Omni 288S accepts the extended fax AT commands to set the modem mode
and fax parameters. Besides the extended fax AT commands, the modem accepts
all the other AT commands described in this chapter. For instance, you can use
ATD to make a fax call, or ATA to answer an incoming fax call. When using the
extended Fax AT commands, you need to send the command ATFCLASS=6 first.
Following are the fax related AT commands:
Mode Setting
Command Function
#F Set the modem into V17G3 FAX mode same function as the
extended AT command AT&N32.
#B0 Set fax receiving mode. The connection parameters and received
fax data are sent to DTE continuously following the connect
message. (Default)
#B1 Set fax receiving mode. The messages are separated from the
received fax data. The modem sends CONNECT FAX and
ZyXEL first, then it waits for the DC2 character (hex18) to send
the fax data. When the modem receives a DC2 from the DTE, it
starts to send the fax connection
parameters/SnnnnVnTnRnLnCnP<string><CR><LF> then the
received fax data. In this mode, the modem will wait for DC2 at
the beginning of every page. The DTE software should detect the
page separator RTC and then sends the DC2 to receive the next
page of fax data. This mode is used with a BBS receiving faxes.
#B2 This mode is for the polling feature of the modem. In this mode,
the modem will send a polling signal to the remote fax device to
ask to receive a fax from the remote fax device. The received
fax data will be sent to the DTE continuously following the
message.