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A B C D E F G H I L M N O P Q R S T U V W X Y Z X.25 - CCITT's recommendation for the interface between a DTE and DCE over a PSTN. X.75 - Signalling system which is used to connect packet switched networks (such as X.25) on international circuits. XNS - Xerox Network System protocols, provide routing capability and support for both sequenced and connectionless packet delivery. XOT - Cisco Systems' X.25 over TCP. |