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Control Word Support

VCC cell relay encapsulation requires use of a control word. The control word contains the T, E, C, and U bits, as well as an optional sequence number field.

The JUNOSe implementation of VCC cell relay encapsulation supports the T bit, which is always set to indicate raw ATM cells, and the optional sequence number. The E, C, and U bits have no meaning for VCC cell relay configurations because the router forwards a complete ATM cell with as much header information as possible.

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