Patent ID: 7031341
Filing Date: 2006-04-18
Classification: H04J,H04L,H04Q

Abstract:
1. A data transmission apparatus for transmitting data packets from an upper layer side device to a lower layer side device, comprising: a first receiving means for receiving the data packets from said upper layer side device, and converting said data packets to a first type of frames; a first processing means for encapsulating said first type of frames to form a second type of frames containing a SAPI field including a SAPI identifier and an information field including said data packets; a second processing means for encapsulating said second type of frames into a payload portion, inserting appropriate overheads corresponding to said data packets, so as to form a third type of frames; and a first transmitting means for outputting said third type of frames to said lower layer side device, wherein said upper layer is Ethernet MAC layer, said first type of frames are MAC frames, said second type of frames are LAPS frames, and the third type of frames are SDH/SONET frames.