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Configuration Quick Reference A-21
Configuration
Quick-Reference
AT
*
FL5 =TxClk Transmit Clock. This option applies only in SDC mode. When the Tx Clk flow control option
is selected, the modem uses a transmit clock for flow control based on available buffer space.
The transmit clock is stopped when the buffers are full, inhibiting the flow of data from the
DTE. It is started again when buffer space is available.
NOTE:
This option is operational only
when internal timing has been selected (Clock=Internal, AT&X).
Hold DL Line
Hold Dial Line
This command forces the modem to hold a dial restoral connection while testing a leased line
connection. This command applies to modems configured for restoral.
AT
*
HD0 =Off The Hold Dialine option is disabled; a dial modem configured for restoral disconnects from the
dial line normally. A leased line modem configured for restoral disconnects from the dial line
as soon as it connects to the leased line.
AT
*
HD1 =1min A dial modem configured for restoral holds the dial line for 1 minute. A leased line modem
configured for restoral holds the dial line for 1 minute while testing the leased line.
AT
*
HD2 =2min
AT
*
HD3 =3min
AT
*
HD4 =4min
AT
*
HD5 =5min
DTE Ct. 141
DTE Circuit 141
Controls whether the local DTE can send the modem into a local analog loopback by sending a
signal on V.24 Circuit 141 (Pin 18) to the modem. The DTE must support Circuit 141 in order
to use this option.
AT
*
LA0 =Off The modem does not respond to a signal on Circuit 141 (Pin 18).
AT
*
LAl =On An off-to-on transition on Circuit 141 (Pin 18) causes the modem to initiate a local analog
loopback test.
An on-to-off transition on V.24 Circuit 141 (Pin 18) takes the modem out of a local analog
loopback test.
Line Compen
Line Compensation
Enables the modem to compensate for the effects of low loss in the End Office-to-End Office
connections.
AT
*
LC0 =Off Disables the Line Compensation option.
AT
*
LC1 =On Enables the Line Compensation option.
DTE Ct. 140
DTE Circuit 140
Controls whether the local DTE can put the modem into a remote digital loopback by sending a
signal on V.24 Circuit 140 (Pin 21) to the modem.
AT
*
LD0 =Off The modem does not respond to a signal on V.24 Circuit 140 (Pin 21).
AT
*
LDl =On An off-to-on transition on V.24 Circuit 140 (Pin 21) sends the modem into a remote digital
loopback test. An on-to-off transition on V.24 Circuit 140 (Pin 21) takes the modem out of a
remote digital loopback test.
D to L
Dial to Leased Option, Automatic Disconnect
Lets the modem automatically disconnect from the dial line and return to the leased line after a
specified period.
AT
*
LE0 =Manual Pressing the Talk/Data key (at the Home position) returns the modem to the leased line.
Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT
Command
Parameter &
Option Description
Gray shading indicates country-specific options. See Appendix C for your country’s options.