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2.5. Interfaces
2.5.1. DB9 Connector (RS232)
Use the connector to communicate with a controlling device, RS232 interface.
Factory settings: speed – 57600 bit/s, data bits – 8, parity – none, stop bit – 1. The AT
-
commands are used
to control the modem operation (see the module description).
There are several specific features of this modem:
Autobauding is not supported
No DTR, DSR, DCD, RING circuits. Management of this circuits by using AT-commands is prohibited.
Using AT-commands you see ERROR message
No fax or CSD calls. Using of AT-commands is prohibited, ERROR message is show
If multiplex mode is activated for USB interface, AT-commands is not supported
Please see the external look of the connector on Figure 2.5.1:
Fig. 2.5.1.
DB9 connector
Attention:
RS232 standard (COM-port) does not support a "hot" connection.
To avoid damaging the COM-port of the modem connect and disconnect the device at least 5 seconds after
the power of the connecting devices has been turned off.
Summary of Contents for MC52PU
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