Global titles

Strings of digits, such as a telephone number or a mobile identification number, that routes TCAP transactions when the actual destination point code is unknown or can change. A global title is translated into a destination point code/SSN by the SCCP layer. Translations are configured in the SCCP configuration database. For more information, refer to Global title translation.

The global title must be BCD-encoded. The global title 8471234567 is BCD encoded as:

tInfo.cdAddr.glTitle[0] = 0x48;
tInfo.cdAddr.glTitle[1] = 0x17;
tInfo.cdAddr.glTitle[2] = 0x32;
tInfo.cdAddr.glTitle[3] = 0x54;
tInfo.cdAddr.glTitle[4] = 0x76;

The original global title was 10 digits long. BCD-encoded, it is five bytes in length. This is used as the global title length.

tInfo.cdAddr.glTitleLen = 5;

Global titles are encoded as follows:

Octet 1   

2nd address digit

1st (most significant) address digit

...

...

...

Octet n

m + 1th address digit or filler

mth address digit


 

Each digit is encoded with the following bit pattern:

Bit pattern

Digit/signal

0000

0

0001

1

0010

2

0011

3

0100

4

0101

5

0110

6

0111

7

1000

8

1001

9

1010

spare

1011

code 11

1100

code 12

1101

spare

1110

spare

1111

ST