Labels:text | screenshot | font | number | line | document OCR: THE 802.9 MAC REQUEST/GRANT PROTOCOL ISTE Access Unit PDU Ready to be Sent .. REQ-bit = 1 Allocate Buffer ... GRANT-bit = 1 Ready to Receive .. Send PDU ... Payload = MAC frame >> Payload - MAC frame . >>- Payload = MAC frame . .. . "> Finished ... FIGURE 5: The Access Control field of the TDM frame contains one GRANT-bit and three request bits (REQ-bit). When an integrated services terminal equipment sends a frame, it sets the REQ-bit corresponding to the MAC frame's priority.