Patent ID: 7715431

Claim:
A modem relay connection system wherein at least one of two modem terminal devices does not use a V.42 link layer protocol to communicate data, the system comprising: a transport mechanism for transporting a data stream in a modem relay connection, wherein the data stream is associated with a V.14 or synchronous modem, said transport mechanism utilizing either a specified V.14 raw mode or a specified V.14 character mode; said transport mechanism including a sequenced unreliable transport; and said transport mechanism further including a rate-control mechanism for speed-matching an end-to-end flow of data within the data stream, the rate-control mechanism including: an effective data rate (EDR) calculator to calculate a transmit rate for a selected stream independently of predetermined non-content information including format and frame information of the selected stream; and a speed shift mechanism to identify a rate used for transmitting the selected stream according to an output of the EDR calculator.