Interface Description; Crc-Set Cellular Result Codes; Command Syntax; Description - Huawei MU509 At Command Interface Specification

HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification

9.4.2 Interface Description

While the DCE is in data mode, this command enable DCE switch to command mode.
Or while the DCE is in transparent mode of Embedded TCP/IP function, +++ will make
the DCE return to command mode. For Embedded TCP/IP function, +++ can be used
in serial and USB ports, for the other case, +++ can only be used in serial port.
When executing this command, any character is forbidden in 900ms before and after
inputting "+++", and it must be less than 900ms between two „+‟ input.
Note:
9.5 +CRC–Set Cellular Result Codes

9.5.1 Command Syntax

Command
+CRC[=<mode>]
+CRC?
+CRC=?

9.5.2 Description

The SET command controls whether or not the extended format of incoming call
indication GPRS network request for PDP context activation is used. When enabled,
an incoming call is indicated to the TE with unsolicited result code +CRING: <type>
instead of the normal RING.
The READ command returns the current mode value.
The TEST command returns values supported as a compound value.

9.5.3 Defined Values

<mode>:
0: Disables extended format (default value)
Issue 04 (2013-01-28)
Not Support PCUI port.
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Copyright © Huawei Technologies Co., Ltd.
Possible response(s)
<CR><LF>OK<CR><LF>
<CR><LF>ERROR<CR><LF>
In case of MS-related error:
<CR><LF>+CME ERROR: <err><CR><LF>
<CR><LF>+CRC: <mode><CR><LF>
<CR><LF>OK<CR><LF>
<CR><LF>+CRC: (list of supported
<mode>s)<CR><LF>
<CR><LF>OK<CR><LF>
Call Control Commands
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