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COMSPHERE 3800 Series Modems
9-36 November 1996 3810-A2-GB30-20
Table 9-6
(3 of 6)
V.42/MNP/Buffer Configuration Options
*EC Negotiat Bfr: Disable
Nxt Disable Enable Disab&Switch
Error Control Negotiate Buffer. Determines if the answering modem buffers the data that it received from the remote
modem during an interval in which the modem attempts to establish a connection using error control. Online changes do
not take effect until a disconnect occurs.
Disable – Data is not buffered during the link negotiating (handshaking) sequence.
Enable – Data is buffered while the link is being established. Initialization data is not passed on the DTE during the
handshaking sequence.
Disable and Switch – Data is not buffered during the handshaking sequence. However, when the modem receives an
error control fallback character, it switches to Buffer mode. (See EC Fallback Char configuration option.)
The factory default is Disable.
AT command for Disable is \C0.
AT command for Enable is \C1.
AT command for Disab&Switch is \C2.
*EC Fallbck Char: 013 ASCI
Nxt " 013 ASCI
Error Control Fallback Character. This configuration option allows you to enter the ASCII value of the error control
fallback character. This provides the remote modem with the ability to end the error control link negotiating
(handshaking) sequence by sending this character. The modems will connect in Buffer mode (no error control). Online
changes do not take effect until a disconnect occurs.
When the modem receives this fallback character it switches to Buffer mode and transmits an EC fallback character to
the DTE. When comparing incoming characters for a match against the EC fallback character, the modem ignores parity.
The factory default is 13 ASCII.
NOTE: This configuration option is only available if EC Negotiate Buffer is configured for Disab&Switch.
AT command is %A
n
, where
n
is a value from 0 to 127.
*Flw Cntl of DTE: CTS_to_DTE
Nxt CTS_to_DTE Disable XON/XOFF
Flow Control of DTE. Determines how the modem controls the flow of data from the DTE.
CTS to DTE – Method of flow control in which the modem raises and lowers its CTS interface lead to indicate when the
DTE should start and stop sending data.
Disable – The modem cannot control the flow of data from the DTE.
XON/XOFF – Method of flow control in which the modem sends XON and XOFF characters to the DTE to start and stop
the flow of data.
The factory default is CTS to DTE.
AT commands for Disable are \Q0, \Q5, and \Q6.
AT commands for XON/XOFF are \Q1 and\Q4.
AT commands for CTS to DTE are \Q2 and \Q3.
*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface
configuration options group for more on Async/Sync Mode.