Call reference

Identifies the reference number assigned to a call for use in subsequent messages related to that call. This number has meaning only to the exchange that assigns it.

Note: For ANSI networks, use the callRefA structure that supports 24-bit point codes. For ITU-T networks, use the callRef structure that supports 14-bit point codes.

typedef struct _callRef      /* Call Reference */
{
    ElmtHdr eh;              /* element header */
    TknU32  callId;          /* call identity  */
    TknU16  pntCde;          /* point code     */
} SiCallRef;

typedef struct _callRefA     /* Call Reference */
{
    ElmtHdr eh;              /* element header */
    TknU32  callId;          /* call identity  */
    TknU32  pntCde;          /* point code     */
} SiCallRefA;

The callID field is encoded as a 32-bit quantity of which the least significant 24 bits are used.

The pntCde field is encoded as a 32-bit (ANSI) or 16-bit (ITU-T) quantity of which the least significant 24 bits (ANSI) or the least significant 14 bits (ITU-T) are used. For example, an ANSI point code represented by the decimal string 1.4.7 is encoded as the hexadecimal number 0x00010407.

Tokens