With a Real-time direct connection between sending device and receiving device, there’s no middle man that can alter the content of the fax in transit and the sender and receiver know and can agree on the delivery time.
- These are protocols that implement the real-time fax transmission.
- T.30 protocol is used when the network connection carries analog signals as in PSTN or VoIP calls.
- T.38 protocol is used when the network connection carries digital signals as in FoIP calls.
- T.38 encapsulates T.30, stripped of its analog considerations.
- When the direct connection is secure, there can be no false confirmation that the fax was sent and no case for the receiver to deny it was correctly received at a given date and time.