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 |