-------- | TCAP | -------- | ------- -------- -------- -------- -------- ------- -------- | V52 | | MTP3 | | MTP3 | | ISUP | | SCCP | | DSS1 | | TCAP | ------- -------- -------- -------- -------- ------- -------- | | | | | | | -------- -------- -------- -------- ------- ------- | V5UA | | M2UA | | M2PA | | M3UA | | IUA | | SUA | -------- -------- -------- -------- ------- ------- | | | | | | ------------------------------------------------------------ | SCTP | ------------------------------------------------------------ | ------------------------------------------------------------ | IP | ------------------------------------------------------------