US Robotics 56K Series Manual page 79

&Rn Sets Receive Data (RD)
hardware flow control,
Request to Send (RTS), see
also &Hn
&R0 Reserved
&R1 Modem ignores
RTS
&R2 Received Data to
computer only on RTS
&Sn Controls Data Set Ready
(DSR) operations
&S0 DSR override; always
ON
&S1 Modem controls DSR
&Tn Begins test modes
&T0 Ends testing
&T1 Analog Loopback
&T2 Reserved
&T3 Local Digital Loopback
&T4 Enables Remote
Digital Loopback
&T5 Prohibits Remote
Digital Loopback
&T6 Initiates Remote
Digital Loopback
&T7 Remote Digital with
self-test and error
detector
&T8 Analog Loopback with
self-test and error
detector
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