The system problem in case 0944784115 --->(A)0805201579 (DTAC) Holding call -->(B)0948300010 DTAC let detailed examination. check SIP Server Holding call , Suspend message and Resume message
The system problem in case 0944784115 --->(A)0805201579 (DTAC) Holding call -->(B)0948300010 DTAC let detailed examination. check SIP Server Holding call , Suspend message and Resume message