Chapter 4 - V.22bis Commands
&R RTS/CTS Option
This selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &K command). The parameter value, if valid, is written to S21 bit 2.
Syntax &R<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0In sync mode, CTS tracks the state of RTS; the
1In sync mode, CTS is always ON and RTS transitions are ignored. In async mode, CTS is normally ON and will
turn OFF only if required by flow control. Result Codes OK <value> = 0 or 1
ERROR Otherwise
\G Modem-to-Modem Flow Control (XON/XOFF)
The modem enables or disables the generation or recognition of
Due to the buffering system used in the modem,
Defined Values
<value> Decimal number corresponding to the selected option.
0Disables
1Enables
Result Codes OK <value> = 0 or 1
ERROR Otherwise
+IFC DTE-Modem Local Flow Control
This
Syntax +IFC=[<modem_by_DTE>[,<DTE_by_modem>]]
Defined Values
<modem_by_DTE> Specifies the method to be used by the DTE to control the flow of received data from the modem.
0None.
1XON/XOFF on transmitted data (XON/XOFF on transmit data); do not pass XON/XOFF characters to the remote modem.
2Circuit 133 (Ready for Receiving). (Default)
3DC1/DC3 on circuit 103 (Transmitted Data) with DC1/DC3 characters being passed through to the remote
DCE in addition to being acted upon for local flow control
<DTE_by_modem> Specifies method to be used by the modem to control the flow of transmitted data from the DTE.
0None.
1XON/XOFF on received data.
2CTS/RTS. (Default)
Reporting Current or Selected Values
Command: +IFC?
Response: +IFC: <modem_by_DTE>,<DTE_by_modem>
Example: +IFC: 2,2 For the defaults.
Reporting Supported Range of Parameter Values
Command: +IFC=?
Response: +IFC: (<modem_by_DTE> range),(<DTE_by_modem> range)
Example: +IFC:
18 |