-Switching Circuit-switched( traditional CS, fast CS,...) Packet-switched (ATM, MPLS, Ethernet, FR oken ring, Token bus), X25,.) -Media processing Sampling(8Khz, 16Khz Coding( G.711 A/u-law for voice, Compressing /Decompressing(G723.1, G729A, for voice: H 261/H 263, JPEG ( Joint Photographic Experts Group), MPEG-4(Motion Picture Experts Group) for Video Storing, editing, 202l/1/27 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University2021/1/27 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University 4 –Switching • Circuit-switched ( traditional CS, fast CS,…) • Packet-switched (ATM,MPLS , Ethernet, FR , Token ring, Token bus), X.25,…) –Media processing • Sampling ( 8Khz, 16Khz, …) • Coding( G.711 A/-law for voice, …) • Compressing / Decompressing ( G723.1, G729A, for voice; H.261/H.263, JPEG (Joint Photographic Experts Group) , MPEG-4 (Motion Picture Experts Group) for Video • Storing , editing,…