EC500 calls to Xmobile second call not arrives if first one is active.
When 1st call is done to Xmobile sta XXX via EC500 goes correct to cellular phone, if having first call active a second EC500 call is done to same Xmobile station XXX just caller listen ringing and if under this second ringing sequence 1st call is completed/disconnected then second already ringing will go correct answered by Xmobile station XXX
Customer expectation is when 1st call is active and second one arrives both calls should be arrives and be answered by cell phone.