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Graphics Interchange Format  |  1998-02-10  |  29.9 KB  |  319x282  |  4-bit (16 colors)
   ocr: SWITCHED WANSERVICES Frame WAN X.25 relay SMDS ATM service Data rate: SONET rates DSO DS1 DS3 64 1.544 45 Kbps Mbps Mbps Figure3. Each ofthef four WAN. services shown oper- ates at a slightly different rate of data transmisston.