Huawei MU509 At Command Interface Specification page 87

HUAWEI MU509 HSDPA LGA Module
AT Command Interface Specification
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<RD>: it indicates whether the SC needs to receive the short message that is still
stored in the SC and has the MR and DA identical with those of the message sent
previously from the same OA. The values are as follows:
0: To receive
1: Not to receive
<VPF>: it indicates the validity of the VP field and the format. The values are as
follows:
bit4 bit3
0 0
1 0
currently.
0 1
1 1
<RP>: indicates the setting of the path of the message reply. The values are as
follows:
0: No setting.
1: Settings are available. It indicates that the reply has the SC number settings
identical with those of the message, and the return path is the same.
<UDHI>: indicates the user data header. The values are as follows:
0: The user data segment contains only contents of the message.
1: In addition to the message, the user data segment contains a data header.
<SRR>: state report request indication
0: State report information about successful sending of a message is not required.
1: State report information about successful sending of a message is required.
<MR>: message ID. The value ranges from 0 to 255.
<DA>: DA (destination address), same as defined in SCA. There are a total of
2–12Otects. Therefore, the longest address in the DA segment contains 20 digits.
<PID>: protocol indication. The values are as follows:
Issue 04 (2013-01-28)
0 SMS-DELIVER REPORT (in the direction MS to SC)
0 SMS-STATUS-REPORT (in the direction SC to MS)
0 SMS-COMMAND (in the direction MS to SC)
1 SMS-SUBMIT (in the direction MS to SC)
1 SMS-SUBMIT-REPORT (in the direction SC to MS)
1 Reserved
The VP field is invalid
The VP field is valid and the format is "relative". Only this format is available
The VP field is valid, and the format is "enhanced".
The VP field is valid, and the format is "absolute".
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Short Message Service Commands
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