Huawei EM770W At Command Interface Specification page 88

Where, the <SCA>, <sc_len>, <type_addr>, and <numbers> fields are defined in the
same way as in the section "Message sending command".
For sent message, the data structure of TPDU is the same as defined in "Message
sending command". For the received message, the data structure of TPDU is as
follows:
1 Oct
TP-MTI MMS 0
Bit0 Bit1 Bit2 Bit3
<MTI>: Same as defined in the section "Message sending command".
<MMS>: Indicates whether there are more messages to be sent.
0
1
<SRI>: Indicates whether the SME (short message entity) has requested a state
report.
0
1
<UDHI>: Same as defined in the section "Message sending command".
<RP>: Same as defined in the section "Message sending command".
<OA>: Source address. Same as defined in SCA. Total 2~12Otects. Therefore, the
longest address in the OA segment contains 20 digits.
<PID>: Protocol indication. Same as defined in the section "Message sending
command".
<DCS>: Coding mode of user data. Same as defined in the section "Message sending
command".
<SCTS>: Time chop of SMC, including year, month, day, hour, minute, second and
time difference. Time difference refers to the difference of time between the local time
and the Greenwich standard time.
<UDL>: User data length. Same as defined in the section "Message sending
command".
<UD>: The length of a specific user data depends on the UDL.
Text mode:
<stat> Message type. The default value is 0:
"REC UNREAD"
"REC READ"
Issue 18 (2009-06-22)
0 SRI UDHI
Bit4 Bit5 Bit6
Nonexistent
Existent
Nonexistent
Existent
unread SMS
read SMS
Commercial in Confidence
HUAWEI UMTS M2M Module V100R001
AT Command Interface Specification
2 Oct~12 1 Oct
Oct
RP OA PID
Bit7
1 Oct 7 Oct 1Oct
DCS SCTS UDL
Page 84 of 169
UD