Labels:text | screenshot | font | diagram OCR: ATM CELL FORMAT CLP, 1 bit VPI VCI. PT 12 bits 16 bits 3 HEC bits 8bits NNI header AT& cell Header Information field 5 bytes 48 bytes GFC 4 VPI, VCI, PT HEC bits 8 bits 16 bits bita 8 bits UNI header CLP, 1 bit GFC = Generic Row Control CLP = Cell Loss Priority VPI = Virtual Path Identifier HEC = Header Error control VCI = Virtuel Channel Identifier NNI = Network to-Network Interface PT =: Payload Type UNI & User-to-Network Interface Figure 2. There are two possible cell header formats for ATM cells: the User to-Network Interface format and the Network-to-Network Interface format. The applicable format depends on the cell's location in the network. A major difference between the two lies in the generic flow control field.
