User's Guide for ZyXEL Omni 56K USB Modem

5-15

RESPONSE VALUE FUNCTION AND DESCRIPTION
n=00 Normal and proper end of connection.
n=10 Transmit error on phase A hang up code.
n=20 Transmit error on phase B hang up code.
n=40 Transmit error on phase C hang up code.
n=50 Transmit error on phase D hang up code.
n=70 Receive error on phase B hang up code.
n=90 Receive error on phase C hang up code.
n=100 Receive error on phase D hang up code.
+FNSC:"HEX string" Report the non-standard facilities command
frame.
+FNSF:"HEX string" Report the non-standard facilities frame
response.
+FNSS:"HEX string" Report the non-standard setup frame
response.
+FPOLL Remote polling indication.
+FPTS:n Receive page transfer status response; refer
to +FPTS=n command.
+FTSI:"string" Report remote ID response TSI.
+FVOICE Transition to Voice response.

Class 2 Flow Control

Flow control is necessary to match the DTE-DCE data rate to the line-signaling ratewhile transmitting or receiving Group 3 (T.4) data. In Class 2 fax mode, both hardware(RTS/CTS) and software (XON/XOFF) flow control are enabled.