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An HDLC-like link layer will be used between ES-to-ES links as well as ES-RN links. ATM packets and radio parameters will be encapsulated within the HDLC-like frame. Link-up and link-down will be determined using the same mechanism as AX.25; a timer which checks the link status at periodic intervals.

Steve Bush
Sun Aug 25 17:29:09 CDT 1996