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AT Command Set Operation
Dialing type
T
&T n
Test mode
Attention:
&T
The
command
should not be used in a
string with other
commands.
DTE speed
\T n
Private line transmit level Configures the transmit level of the SC Dual V.34 for private line operation (0 dBm
:T n
Inactivity timer
%T n
4-18
Instructs the modem to use tone dialing as its selected dialing method. When the
is used alone, it sets the modem default to tone dialing. When the
used in a dial string, it acts as a modifier and affects only the dialing of that string.
Controls the soft operation of test modes. The self-test pattern for speeds of 1200
and 2400 bps is made up of alternate ones and zeros; the 511 pattern is generated
for all other speeds. Remote digital loopback and self-tests are not operational when
the modems are passing data at 300 bps. All tests operate for the amount of time
S18
specified in
; pending tests such as
&T0
Clears any active test and resumes normal data set operation.
Initiates a soft ANALOOP test mode that directs all local data through the transmitter
&T1
and receiver of the modem. Type
&T3
Initiates a soft Digital Loop test mode that directs all received data from the remote
modem to be looped back to the transmit data. This will echo on the remote DTE.
Any data sent by the remote DTE is returned.
Instructs the modem to accept the in-band request to initiate a remote digital
&T4
loopback.
Instructs the modem to ignore the in-band request to initiate a remote digital
&T5
loopback.
Instructs the modem to transmit the in-band request to establish a remote digital
&T6
loopback with the far modem.
Instructs the modem to transmit the in-band request to establish a remote digital
&T7
loopback with the far modem, and to run the self-test pattern generator.
&T8
Instructs the modem to enter the ANALOOP test mode, and to run the self-test
pattern generator.
Instructs the modem to send a self-test pattern to the remote modem while checking
&T9
the receive data for the same test pattern and checking for errors.
Controls the DTE speed, in conjunction with the switched network handshake mode
command (&Hn). This command requires several factors to consider. Refer to
Command Details
.
\T0
Auto speed
\T3
1200 bps
\T6
7200 bps
\T9
14.4 kbps
\T12
21.6 kbps
\T15
28.8 kbps
\T18
38.4 kbps
\T21
115.2 kbps
\T24
64.0 kbps
\T27
72.0 kbps
thru -15 dBm) in 1 dBm increments. The default is -9 dBm.
The range may be limited according to country code. Use this command when
private line operation for the transmit levels of the modems are too low or too high,
causing an unreliable, error-filled connection.
Sets a timer in minutes (1-255) for disconnecting the line on idle TX or RX data. A
value of 0 disables the timer (default.
SpectraComm Dual V.34 Modem
Installation and Operation
AT Command Reference Tables
DL
are not allowed.
+++
&T0
followed by
\T1
last AT speed
\T4
2400 bps
\T7
9600 bps
\T10
16.8 kbps
\T13
24.0 kbps
\T16
31.2 kbps
\T19
57.6 kbps
\T22
128.0 kbps
\T25
72.0 kbps
\T28
96.0 kbps
T
T
command is
to terminate this test.
AT
\T2
300 bps
\T5
4800 bps
\T8
12.0 kbps
\T11
19.2 kbps
\T14
26.4 kbps
\T17
33.6 kbps
\T20
76.8 kbps
\T23
32.0 kbps
\T26
96.0 kbps
\T29
112.0 kbps
060R122-000
Issue 15
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