Huawei EM770W At Command Interface Specification page 79

<mr>: Message ID. The digits are decimal numbers that range from 0 to 9. The value
range is: 0~255
<ackpdu>: When the value of <service> in "+CSMS" is 1, which is supported by the
network, this field will be returned. Unless no SCA exists, the format is the same as
the format of PDU. This field is not supported currently.
<ctrl-Z>: Identifies the end of a PDU data. The characters are: '0x1A'
<ESC>: Cancels the sending of this message. The characters are: '0x1B'
The structure of the PDU packet is as follows: (The values of the characters described
in the packet are: 0~9, A~F, a~f. Two characters make up one Octet value. for
example: '23'=0x23, '2a'=0x2a, all are hexadecimal}
<sc_len>
<SCA> SMSC address. Its structure is as follows:
Addr.
<sc_len>: Length of the SCA (short message service center number). It is composed
of two characters. It indicates the number of characters occupied by <type_addr> and
<numbers>/2.
<type_addr>: Number address type. It is composed of two characters. Its structure is
as follows:
Type-of-Number(bit6...bit4). The values are as follows:
0 0 0
information of the target address number. In this case, the address number is
organized at the network side.
Issue 18 (2009-06-22)
[<SCA>]
<type_addr>
1
2
3
4
5
................................
μ
1
Type-of-number
This value is written when the user does not know the authentication
Commercial in Confidence
HUAWEI UMTS M2M Module V100R001
AT Command Interface Specification
<numbers>
.
.
.
.
Numbering-plan-identification
TPDU
Address-Length
Type-of-Address
Address-Value
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