This topic specifies the format of tokens, or fields, found within the information elements that make up the SS7 ISUP events passed between the application and the ISUP layer.
Token |
Type |
U8 |
A quantity specified in 8 bits: typedef struct tknU8 /* token U8 */ |
U16 |
A quantity specified in 16 bits: typedef struct tknU16 /* token U16 */ |
U32 |
A quantity specified in 32-bits: typedef struct tknU32 /* token U32 */ |
String |
A variable length sequence of octets such as an address (sequence of digits): typedef struct tknStr /* token string */ |
Extended |
The presence indicator for the entire token, a type field, a length field, and the data itself. This token exists only in the extended element structure. typedef struct _siTknExt /* token string */ The type, len, and val fields are encoded inside the ISUP packet after all known optional parameters. |