During making search about FXO i found that statement" An FXO trunk is one of the simplest analog trunks available or as tie line. Because Dialed Number
Identification Service (DNIS) can only be sent out to the PSTN, no DID is possible and Automatic
Number Identification (ANI) is supported for inbound calls"
Is this mean it only use to make calls to pstn only ( outbound call) and can't make inbound call ?
What is the meaning of tie line?
Waiting for reply?