Huawei EM770W At Command Interface Specification page 83

0100 Reserved.
...
1011
The message contents are
discarded.
1100
waiting prompt is given, and
the user data adopts GSM 7
bit coding
1101
The message is stored. The
message waiting prompt is
given, and the user data
adopts GSM 7 bit coding
1110 The message is stored. The
message waiting prompt is
given, and the user data
adopts
UCS2 coding
Issue 18 (2009-06-22)
1: Bit1 and bit0
indicate message
type
The message
uncompressed
Commercial in Confidence
HUAWEI UMTS M2M Module V100R001
SC. If the SIM card is full, the SC failure and the reasons
will be reported.
1 1 : Class 3, stored to the TE. When the MS
receives the message, but has not transmitted it to the
TE, it will give a response to the SC.
Bit3 bit2 message type indication
0 0 : GSM 7 bit default code
0 1 : 8bit data
1 0 : UCS2 code mode. When the user inputs
Chinese characters, this value will be selected.
1 1 : Reserved.
The settings of Bit3...0 are identical with the settings
made in case of bit7...4=1101
Bit3 Prompt indication. The values are as follows:
0: The message waiting prompt function is invalid
1: Activate the message waiting prompt function
Bit2 Reserved. The value is 0.
Bit1 bit0 message type indication
0 0 : With voice message waiting.
0 1 : With fax message waiting.
1 0 : With E-mail message waiting.
1 1 : Message waiting of other unknown types
The settings of Bit3...0 are identical with the settings
made in case of bit7...4=1101
AT Command Interface Specification
Page 79 of 169