Paradyne COMSPHERE 3800 Series Quick Reference page 3

AT Commands
&Ln Leased-Line Mode
&L0 Disables leased-line operation.
&L1 2-wire originate leased-line operation.
&L2 4-wire originate leased-line operation.
&L3 2-wire answer leased-line operation.
&L4 4-wire answer leased-line operation.
&Mn,&Qn Async/Sync Mode and DTE Dialer Type
&M0,&Q0 Modem operates in Asynchronous
mode and uses AT command protocol.
&M1,&Q1 Modem operates in Synchronous mode
and uses AT command protocol.
&M2,&Q2 Modem operates in Synchronous mode
and dials telephone number stored in
directory location 1 when DTR signal
turns Off and then ON.
&M3,&Q3 Modem operates in Synchronous mode
and uses AT command protocol.
&Q4 Modem operates in Asynchronous mode
and uses AT Command protocol; Hayes
AutoSync is enabled.
&M231, &Q231 Modem operates in Asynchronous
mode; the DTE Dialer Type is disabled.
&M232, &Q232 Modem operates in Asynchronous
mode; V.25bis Async dialing is enabled.
&M233, &Q233 Modem operates in Synchronous
mode; V.25 Bisync dialing is enabled.
&M234, &Q234 Modem operates in Synchronous
mode; V.25bis HDLC dialing is enabled.
&M235, &Q235 Modem operates in Asynchronous
mode; AT&T Exclusive dialing is enabled.
&M236, &Q236 Modem operates in Synchronous
mode; the DTE Dialer Type is disabled.
&Rn RTS Action
&R0 Standard RS232. RTS action is
controlled by DTE.
&R1 Ignores RTS. Modem ignores RTS
signal and treats it as always ON.
&R2 Simulated Control Carrier. State of RTS
follows state of LSD.
&Sn DSR Control
&S0 Forced On. Forces DSR signal ON.
&S1 Standard RS232. Modem controls DSR
signal.
&S2 Wink When Disc. DSR signal turns Off
for approximately 1 to 2 seconds upon
disconnecting.
&S3 Follows DTR. Modem sends DSR to DTE
when it receives DTR from DTE.
&S4 On Early. DSR is Off when modem is in
idle state. DSR goes ON when modem
enters Data mode.
&S5 Delay to Data. DSR does not turn ON
until the modem enters Data mode.
&S6 Dial Backup toggle.
(continued)
3
AT Commands
&Tn Tests
&T0 Stops any test in progress.
&T1 Starts a Local Analog Loopback test
(V.54, L3).
&T2 Transmits and receives a 511 BERT
pattern.
&T3 Starts a Local Digital Loopback test.
&T4 Accepts request from remote modem for
a Remote Digital Loopback test.
&T5 Denies request from remote modem for a
Remote Digital Loopback test.
&T6 Starts a Remote Digital Loopback test
(V.54, type L2).
&T7 Starts a Remote Digital Loopback test
with a Pattern (V.54, type L2).
&T8 Starts a Local Analog Loopback test
with a Pattern (V.54, type L3).
&T9 Starts a self-test.
&Vn View Configuration Options
&V0 Displays Active (Operating) configuration
options.
&V1 Displays Active (Saved) configuration
options.
&V2 Displays Customer 1 configuration
options.
&V3 Displays Customer 2 configuration
options.
&V4 Displays telephone numbers stored in
directory locations 1–10.
&Wn Write (Save to Memory)
&W0 Saves current configuration options in
Active (Operating) to Active (Saved).
&W1 Saves current configuration options in
Active (Operating) to Customer 1.
&W2 Saves current configuration options in
Active (Operating) to Customer 2.
&Xn Transmit Clock Source
&X0 Modem provides internal clock source
for synchronous data (Pin 15).
&X1 Modem uses external source (Pin 24) for
clock for synchronous data.
&X2 Modem uses received signal as clock
source for synchronous data.
&Z n=x Modem stores telephone number x (and
any dial modifiers) in directory location n
(1–10). For example, the command
AT&Z1=555-1234 stores the number
5551234 in directory location 1. To clear
a telephone number from a memory
location, issue &Z n=x without entering a
telephone number.
\ An Maximum Frame Size
\A0 64
\A1 128
\A2 192
\A3 256
\A4 32
\A5 16
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