Construction of SMS PDU’s
LZT 123 7632 R1A
15
The rest is identical to the Service Centre Address as we discussed
above.
Lets break down the destination address we have in our example:
0A817060789620
BINARY REPRESENTATION
OCTET
7 6 5 4 3 2 1 0
FIELD MEANING
0A 0 0 0 0 1 1 0 1
ADDRESS LENGTH: This is
the number of digits in the
Destination mobile
subscriber number.
81
1
0
0
0
0
0
0
1
This is the Type of Address
field. There are two different
fields in this octet. Bits 0-3
are the Numbering plan
Identification. Bits 4-6 are
the Type of Number. Bit 7 is
a fill bit.
70 0 1 1 1 0 0 0 0 The
digits
0
and
7
60 0 1 1 0 0 0 0 0 The
digits
0
and
6
78 0 1 1 1 1 0 0 0 The
digits
8
and
7
96 1 0 0 1 0 1 1 0 The
digits
6
and
9
20 0 0 1 0 0 0 0 0 The
digits
0
and
2.
The Address length says that the mobile number will consist of 10 digits.
The Type of Address field is 81. This means that the Type of Number is
National, and the Numbering plan is ISDN/telephone numbering plan (you
can check yourself from the earlier tables).
And reconstructing the mobile number:
70 60 78 96 20
We see that the Mobile number is:
070-6876902
This is a national number as we expected. Notice that since the number
has an even number of digits no fill bits are required!
4.5 Protocol identifier (TP-PID)
In our example the Protocol Identifier is shown below:
Содержание Construction of SMS PDU's
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