USRobotics V.34 User Manual

Page 137

COURIER HIGH SPEED MODEMS

Alphabetical Command Summary C-15

&S2

This option is for specialized equipment such as
automatic callback units. On loss of carrier, the modem
sends a pulsed DSR signal with Clear to Send (CTS)
following Carrier Detect (CD).

&S3

This is the same as &S2, but without the CTS following
CD.

&S4

The modem sends the computer a DSR signal at the same
time as it sends the Carrier Detect (CD).

Modem testing

&T0 End test

&T1 Initiate Analog Loopback (AL) testing

&T2 Reserved

&T3 Initiate Local Digital Loopback (LDL) testing

&T4 Grant Remote Digital Loopback (RDL)

&T5 Deny RDL

&T6 Initiate RDL testing

&T7 Initiate RDL with self test and error detection

&T8 Initiate AL with self test and error detection

Write the desired template to NVRAM, using the &W
command.

&W0 Write to NVRAM template 0

&W1 Write to NVRAM template 1

Synchronous transmit clock timing signals setting. Determines
whether the modem or DTE will generate the timing signals.

&X0 The Courier is the source of the Transmit clock timing

signals and sends them to your DTE over the RS-232
interface. The DTE rate will follow the connection rates.
Default.