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select
this
TP-DCS
mode)
<TP-UDL>: Number of bytes occupied by the "user data" domain. If the value is 0, the
"User data" domain does not exist.
<TP-UD>: The "user data" domain may include "user data header". If it includes the
header (namely, the value of bit6 in byte0 is 1), the value of TP-UDL is equal to the
length filled in the "User-Data-Header" plus the length of "User-Data". The value of
TP-UDL depends on the specific coding mode. If it is a 7-bit default code, it indicates
that there are a total of how many septets; if it is a 8-bit code, it indicates there are a
total of how many Octets; if it is a UCS2 code, the TP-UDL still means a total of how
many Octets; if there are compressed 7-bit or 8bit or UCS2 codes, the TP-UDL
indicates there are a total of how many Octets after compression. The specific
representation structure in the "User data" domain is shown in the following diagram:
UDL
Issue 18 (2009-06-22)
(uncompre
bit2
ssed
UCS2
code)
bit1~0
(message
waiting
type)
bit3
bit2
1111
(TE
does
not
select this
value
either)
bit1~0
Octets
UDHL IEIa
IEIDLa
IEDa
Total number of Octets
Length Indicator
Length Indicator
Commercial in Confidence
HUAWEI UMTS M2M Module V100R001
AT Command Interface Specification
0
Reserved bits, which make no sense.
0
With voice message waiting.
0
0
With fax message waiting.
1
1
With E-mail message waiting.
0
1
Message waiting of other unknown types
1
0
Reserved bits, which make no sense.
0
7bit code
1
8bit data
0
Class 0, providing display and reply to SC that
0
the message is received but not stored.
0
Class 1, stored to the MS (i.e., NV), or stored to
1
the SIM card
1
Class 2, for use of SIM only. After storing it, the
0
storage state is returned to the SC.
Class 3, stored to the TE. When the MS receives
1
the message, but has not transmitted it to the TE,
1
it will give a response to the SC.
Octets
IEIb ......... IEIn
IEDLn
Total number of Septets
IEDn
Fill bits
SM (7bit data)
Septet Boundary
Page 70 of 169
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