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APPENDIX A. AT COMMANDS
ACTIVE Professional External Modem User’s Manual
17
AT&K4 Enables XON/XOFF flow control
AT&K5 Enables transparent XON/XOFF flow control
AT&K6 Enables both RTS/CTS and XON/XOFF flow control
(Default for fax mode)
AT&Ln * Transmission line type Default : 0
AT&L0 Dial-up line
AT&L1 2-wire Leased line (Option)
AT&L2 4-wire Leased line(Option)
AT&Mn * Communication mode
Same as AT&Q0-3
AT&Pn * Dial pulse ratio Default : 0
AT&P0 39%/61% make/break ratio @ 10pps
AT&P1 33%/67% make/break ratio @ 10pps
AT&P2 39%/61% make/break ratio @ 20pps
AT&P3 33%/67% make/break ratio @ 20pps
AT&Qn * Communication mode Default : 5
AT&Q0 Selects direct asynchronous operation
AT&Q1 Selects synchronous mode 1 operation
AT&Q2 Selects synchronous mode 2 operation
AT&Q3 Selects synchronous mode 3 operation
AT&Q4 Selects autosync operation
AT&Q5 Selects error correction mode
AT&Q6 Selects asynchronous operation in normal mode
AT&Rn * RS232-C RTS/CTS option Default : 0
AT&R0 CTS tracks RTS, CTS is turned ON in response to an OFF-
to-ON transition of RTS from the local DTE after a delay
period specified by register S26 in increments of 10
milliseconds.
AT&R1 The modem ignores RTS, CTS is held ON unless AT&K3
has been selected
AT&Sn * RS232-C DSR option Default : 0
AT&S0 DSR is always ON
AT&S1 DSR operates in accordance with the EIA-232-C
specification
AT&Tn * Test and diagnostic Default : 4
A test can be run only when in an asynchronous operation in non-error
correction mode (normal or direct mode). To terminate a test in
progress, the escape sequence must be entered first, except for
parameters 7 and 8. If S18 is non-zero, a test will terminate
automatically after the time specified by S18 and display the OK
message.