Owner manual

Connection mode This command allows you to enable and disable

error control mode. The &Q command setting has precedence over

\N command setting and registers S36 and S48.

0Asynchronous mode (no error control, disables V.42 and MNP).

5 Error control mode Instructs the modem to make a connection

using V.42/MNP, and fallback as necessary (see S36 and S48

registers).

CTS/RTS Since bus modems have no DTE-DCE serial interface, this

command has no effect and remains for scripting compatibility.

0–1 Return OK.

DSR Since bus modems have no DTE-DCE serial interface, this

command has no effect and remains for scripting compatibility.

0–2 Return OK.

Self-tests The following diagnostic tests are provided. These tests are

available only when no error protocol is engaged. The duration of each

test is controlled by register S18.

0 Terminate the test Used to terminate (escape from) a test in

progress and return to command state, if S18=0.

1 Local analog loopback Initiates a local analog loopback test. The

escape sequence must be entered to terminate this test. This mode

tests the local modem and the local data terminal equipment.

3 Local digital loopback Initiates a local digital loopback test. The

modem echoes characters back to the remote modem exactly as

received.

4 Enable the remote digital loopback Enables the modem to

respond to a remote modem attempting to place it in digital

loopback test. If a remote modem places the local modem in

remote digital loopback mode, the local modem echoes characters

back to the remote modem exactly as received from the remote

modem.

5 Disable the remote digital loopback Prevents the modem from

responding to a remote modem attempting to place it in the digital

loopback mode.

132

PPENDIX