CIMD Interface Specification - Telenor

4.1.1 Header
4.1.2 Data
The header has the following format:
ZZ:NNN
where
. is the start-of-text indicator, which consists of a single byte
containing the decimal value 2.
. ZZ defines the operation code and consists of two bytes containing the
ASCII characters of the digits 0 to 9, which range from 48 to 57.
. NNN represents the message packet number, which consists of 3 bytes
containing the ASCII characters of the digits 0 to 9, which range from 48
to 57.
The ZZ and NNN fields are separated by one byte containing the ASCII code of a
colon, which is 58. The header is terminated by one byte containing the ASCII
code of , which is 9.
An example of the decimal values for each byte of a header is given below:
2 48 49 58 48 48 49 9
In the notation used in the rest of this document, the header looks as follows:
01:001
The data fields consist of a list of parameters each terminated by the
character. All parameter fields have the following format:
PPP:value of the parm
CIMD Interface Specification
where PPP indicates the parameter type and consists of 3 bytes containing the
ASCII values of the digits 0 to 9 (values 48 to 57). After the single byte
containing the ASCII value for the colon (58) the value of the parameter is coded
with a variable number of bytes. The parameter is terminated by a single byte
containing the ASCII value for tab (9).
The coding of the parameter value is dependent on the type of the parameter and
is explained in CIMD parameters in CIMD Interface Specification (PDF).
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