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&Tn
n = 4 or 5
$Tn
n = 0 or 1
#Tn
n = 0 or 1
Un
n = 0–3
Vn
n = 0 or 1
#Vn
n = 0 or 1
W
In dialing
command
&Wn
n = 0 or 1
Xn
n = 0–4
#Xn
n = 0 or 1
Yn
n = 0 or 1
Z
n/a
,
In dial
command
Respond to Remote Digital Loopback Signal
&T4
Enable response to remote digital loopback signal.
*** &T5
Disable response to remote digital loopback signal.
Calling Tone
$T0
Enable calling tone.
*** $T1
Disable calling tone.
Trellis-Coded Modulation
#T0
Disable trellis-coded modulation.
*** #T1
Enable trellis-coded modulation.
Loopback Test Modes
U0
Enable analog loop originate mode.
U1
Enable analog loop answer mode.
U2
Enable remote digital loopback mode.
U3
Enable local digital loopback mode.
Result Codes (Verbose/Terse)
V0
Result codes sent as digits (terse response).
*** V1
Result codes sent as words (verbose response).
V.32terbo Handshake
*** #V0
Enable V.32terbo tones in answer mode.
#V1
Disable V.32terbo tones in answer mode.
Wait for New Dial Tone
Causes modem to wait for new dial tone. ( X2 or X4 must be selected.)
Store Configuration
&W0
Store current settings in NVRAM; modem will load these at power-on or with the
ATZ command instead of reading factory ROM defaults.
*** &W1
Do not store settings.
Result Codes and Call Progress Selection
*** X0
Basic result codes ( CONNECT only); does not look for dial tone or busy.
Extended result codes (w/ CONNECT 1200, CONNECT 2400 , etc.); does not
X1
look for dial tone or busy signal.
Extended result codes with NO DIAL TONE ; does not look for busy signal.
X2
X3
Extended result codes with BUSY ; does not look for dial tone.
X4
Extended result codes with NO DIAL TONE and BUSY .
Number of XOFF Characters Sent
*** #X0
Single XOFF character sent after buffer is full.
#X1
Multiple XOFF characters sent (one for every character received after buffer is
full).
Long Space Disconnect
*** Y0
Disable sending or responding to long space break signal on disconnect.
Y1
Enable sending or responding to long space break signal on disconnect. (Both
modems must have Y1 set.)
Modem Reset
Reset modem to default values. Defaults come from NVRAM if &W0 is set, from ROM
if &W1 is set.
Dialing Pause
Comma; causes dialing pause for time set by S8 .
Appendix
104
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