generates the NO CARRIER message and returns to command mode. If a V.21 carrier is
detected when a high speed carrier is expected, the modem generates the +FCERROR
message and returns to the command mode. If the specified carrier is detected, the modem
generates the CONNECT message and enters the data receive mode.
While in data receive mode, the modem receives data from the remote, adds start and stop
bits, and handles <DLE><chr> character pairs before passing the data to the DTE. The
modem prefixes each <DLE> character with another <DLE> character before sending it to the DTE.
If the modem detects a receive buffer overflow condition, it stops receiving from the remote
until there is room in the receive buffer. The modem informs the DTE of the buffer overflow
after it sends to the DTE the last character that was stored in the buffer before the overflow occurred.
If the modem receives any character from the DTE after the +FRM command (except flow
control characters if software flow control is in effect), or if the modem detects a high-to-low
transition of the DTR signal while &D1 is in effect, it sends <DLE><ETX> to the DTE,
generates the OK result code, and returns to command mode. The receive buffer is cleared
and all data received from the remote is discarded. If loss of DTR is detected while &D2 is in
effect, the modem goes on-hook, sends <DLE><ETX> followed by OK result code to the
DTE, and returns to command mode. If the modem detects a DTR drop while &D3 is in
effect, the modem performs a warm reset.
4.2 Commands and Parameters
4.2.1 Mode Entry Commands
+FCLASS=1 - Select Facsimile Class 1 Mode
+FCLASS=1 selects the Fax Class 1 Mode. The Fax Class 1 Mode commands and responses
described in this section are applicable when cFCLASS=1 as shown in Table 4-1.
(See +FCLASS in Section 3.2.1 for the definition of the FCLASS command.)
+FCLASS=1.0 - Select Facsimile Class 1.0 Mode
+FCLASS=1.0 selects the Fax Class 1.0 Mode. The Fax Class 1.0 Mode commands and
responses described in this section are applicable when cFCLASS=1 as shown
Table 4-1. (See +FCLASS in Section 3.2.1 for the definition of the FCLASS command.)
4.2.2 Mode Commands
+FAE - Auto Answer Enable
This command enables or disables fax adaptive answer.
Syntax
+FAE=<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Disable data /fax auto answer mode. (Default.)
1 Enable data /fax auto answer mode. The modem
determines the calling type and issues DATA result
code (13) if the caller is a data modem or issues FAX
result code (15) if the caller is a fax modem.
+FTS - Transmit Silence
This command causes the modem to terminate a transmission and wait for <time> 10-ms
intervals before responding with the OK result code.
Syntax
