11
mode, CTS acts according to V.25bis handshake.
&R1 In sync mode, CTS is always ON. In async mode, CTS will only drop if required by flow control.
(Default)
&Sn - DSR Override
This command selects how the modem will control DSR.
&S0 DSR will remain ON at all times.
&S1 DSR will become active after answer tone has been detected and inactive after the carrier has
been lost. (Default)
&Tn - Test and Diagnostics
The modem will perform selected test and diagnostic functions according to the parameter supplied. A test
can be run only when in asynchronous operation in non-error-correction mode (normal or direct mode). To
terminate a test in progress, the escape sequence must be entered first, except for parameters 7 and 8. If
S18 is non-zero, a test will terminate automatically after the time specified by S18 and display the OK
message.
&T0
Terminates test in progress.
&T1
Initiates local analog loopback, V.54, Loop 3.
&T2
Returns ERROR.
&T3
Initiates local digital loopback, V.54 Loop 2.
&T4
Enables digital loopback for remote request. (Default)
&T5
Disables digital loopback for remote request.
&T6
Requests a remote digital loopback, V.54 Loop 2 without self test.
&T7
Requests remote digital loopback, V.54 Loop 2, with self test.
&T8
Initiates local analog loopback, V.54 Loop 3, with self test.
&V - Display Current Configuration and Stored Profiles
Reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone
numbers.
&V1 - Display Status of Last Call
Presents an analysis of modem performance and telephone circuit quality during the last call.
&Wn - Store Current Configuration
Saves the current configuration and S -Registers in one of the two user profiles which are kept in non-volatile
memory (NVRAM).
&W0 Store as profile 0.
&W1 Store as profile 1.
&Xn - Select Synchronous Clock Source
Selects the source of the transmit clock for synchronous operation.
&X0 Internal clock from DCE.
&X1 External clock from DTE. (DTE must supply clock on pin 24)
