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Modem Reference Information
148 Corporate Evaluator’s Guide
Command Function (Ambit)
&R1 CTS is always active (sync) or CTS is normally ON and will turn OFF only if required by flow control
(async)
&S0 DSR is always active
&S1 DSR will become active after answer tone has been detected and inactive after the carrier has been lost
&T0 Terminate any test in progress
&T1 Initiate local analog loopback
&T2 Returns ERROR result code
&T3 Initiate local digital loopback
&T4 Allow remote digital loopback (RDL)
&T5 Disallow remote digital loopback request
&T6 Request an RDL without self-test
&T7 Request an RDL with self-test
&T6 Request an RDL without self-test
&T7 Request an RDL with self-test
&T8 Initiate local analog loop with self-test
&V Display current configuration and stored profiles
&V1 Display last connection statistics
&W0 Store the current configuration as profile 0
&W1 Store the current configuration as profile 1
&X0 Select internal timing for the transmit clock
&X1 Select external timing for the transmit clock
&X2 Select slave receive timing for the transmit clock
&Y0 Recall stored profile 0 upon power up
&Y1 Recall stored profile 1 upon power up
&Zn=x Store dial string x (up to 34 digits) to location n (0 to 3)
%E0 Disable line quality monitor and auto retrain
%E1 Enable line quality monitor and auto retrain
%E2 Enable line quality monitor and fallback/fall forward
%L Return received line signal level
%Q Report the line signal quality
%TTn PTT testing of signal level: 00-09=DTMF dial 0-9, 0A=DTMF *, 0B=DTMF #, 0C=DTMF A, 0D=DTMF B,
0E=DTMF C, 0F=DTMF D, 10=V.21 Channel 1mark symbol, 11=V.21 Channel 2mark symbol, 15=V.22
originate signaling at 1200bps, 16=V.22bis originate signaling at 2400bps, 17=V.22 answering signaling ,
18=V.22bis answer signaling, 19=V.21 Channel 1space symbol, 1A=V.21 Channel 2 space symbol,
20=V.32 9600bps, 21=V.32bis 14400bps, 30=Silence, 31=V.25 answer tone, 32=1800Hz guard tone,
33=V.25 calling tone (1300Hz), 34=Fax calling tone (1100Hz), 40=V.21 channel 2, 41=V.27ter 2400bps,
42=V.27ter 4800bps, 43=V.29 7200bps, 44=V.29 9600bps, 45=V.17 7200bps long, 46=V.17 7200bps
short, 47=V.17 9600bps long, 48=V.17 9600bps short, 49=V.17 12000bps long, 4A=V.17 12000bps
short, 4B=V.17 14400bps long, 4C=V.17 14400bps short, 60=2400bps (V.34 only), 61=4800bps (V.34
only), 62=7200bps (V.34 only), 63=9600bps (V.34 only), 64=12000bps (V.34 only), 65=14400bps,
66=16800bps, 67=19200bps, 68=21600bps, 69=24000bps, 6A=26400bps, 6B=28800bps, 6C=31200bps,
6D=33600bps