1. Figure 2-6: Internal Organization of Protocol Entity (Sending End) Figure 4-14: Internal Organization of Protocol Entity (Sending End) MAP Packet Service MAP Packet Processing VC Access Service VC_FSH Service VC Frame Service Master Channel Insert Service MC Frame Service Virtual Channel Generation Virtual Channel Multiplexing Master Channel Generation Master Channel Multiplexing All Frames Generation MAP Demultiplexing MAP Access Service MAP Generatio n VC Packet Service VC Packet Processing Transfer Sublayer Segmentation Sublayer COP Mgmt Service

2. MAP Packet Service MAP Packet Extraction VC Access Service VC_FSH Service VC Frame Service Master Channel Insert Service MC Frame Service Virtual Channel Reception Virtual Channel Demultiplexing Master Channel Reception Master Channel Demultiplexing All Frames Reception Figure 2-6: Internal Organization of Protocol Entity (Receiving End) Figure 4-14: Internal Organization of Protocol Entity (Receiving End) MAP Demultiplexing MAP Access Service MAP Reception VC Packet Service VC Packet Extraction Transfer Sublayer Segmentation Sublayer

3. MAP Packet Service Packet MAP Access Service VC_FSH Service VC Frame Service MC Frame Service VC_OCF Service Figure 2-7: AOS/TM Space Data Link Protocol Channel Tree MAP_SDU FSHVC_OCF VC Frame VCID Insert MC Frame MCID Master Channel Insert Service Multiplexer/ DeMultiplexer Key MAPID Packet Service Packet All Frame

4. Figure 4-1: TC Transfer Frame Structural Components Transfer Frame Primary Header Master Channel Insert Zone ( Optional ) Transfer Frame Secondary Header ( Optional ) Transfer Frame Data Field Frame Error Control Field ( Optional ) 5 OctetsOptionalUp to 64 OctetsVaries2 Octets Up to 1019 Octets TC Transfer Frame

5. Figure 4-2: TC Transfer Frame Primary Header Transfer Frame Version Number Command Control Flag Virtual Channel ID Virtual Channel Frame Sequence Count 2 Octets 2 bits10 bits6 bits1 bits 2 Octets1 Octets Frame Length 10 bits Sec Header Flag Reserved Spare 1 bits Bypass Flag TC Transfer Frame Primary Header (5 Octets) Spacecraft ID 1 bits

6. Packet Service Packet Processing VC Access Service VC_FSH Service VC Frame Service MC Frame Service MC_OCF Service Virtual Channel Generation VC_OCF Service Virtual Channel Multiplexing Master Channel Generation Master Channel Multiplexing All Frames Generation Figure 2-5: Internal Organization of Protocol Entity (Sending End) Figure 4-7: Internal Organization of Protocol Entity (Sending End) MC_Insert Service

7. Packet Service Packet Extraction VC Access Service VC_FSH Service VC Frame Service MC_Insert Service MC Frame Service MC_OCF Service Virtual Channel Reception VC_OCF Service Virtual Channel Demultiplexing Master Channel Reception Master Channel Demultiplexing All Frames Reception Figure 2-6: Internal Organization of Protocol Entity (Receiving End) Figure 4-14: Internal Organization of Protocol Entity (Receiving End)

8. Packet Service Packet VC Access Service VC_FSH Service VC Frame Service MC Frame Service MC_OCF Service VC_OCF Service Figure 2-7: AOS/TM Space Data Link Protocol Channel Tree VCA_SDUFSHVC_OCF VC Frame VCID Insert MC_OCF MC Frame MCID MC_Insert Service Commutator/ Decommutator Multiplexer/ DeMultiplexer Key

9. Figure 4-1: AOS Transfer Frame Structual Components Transfer Frame Primary Header Master Channel Insert Zone ( Optional ) Transfer Frame Secondary Header ( Optional ) Transfer Frame Data Field Transfer Frame Trailer ( Optional ) Operational Control Field ( Optional ) Frame Error Control Field ( Optional ) 6 OctetsUp to 64 OctetsVaries to fill framr4 Octets2 Octets Transfer Frame Primary Header Master Channel Insert Zone ( Optional ) Transfer Frame Secondary Header ( Optional ) Transfer Frame Data Field Transfer Frame Trailer ( Optional ) Operational Control Field ( Optional ) Frame Error Control Field ( Optional ) 6 OctetsFixedUp to 64 OctetsVaries to Fill Frame4 Octets2 Octets Figure 4-1: TM Transfer Frame Structual Components Fixed Transfer Frame Header Error Control ( optional ) 2 Octets

10. Figure 4-2: TM Transfer Frame Primary Header Transfer Frame Version Number Spacecraft ID Virtual Channel ID OCF Flag Master Channel ID Transfer Frame Data Field Status Master Channel Frame Count Virtual Channel Frame Count 2 Octets 2 bits10 bits3 bits 1 bits 1 Octets 2 Octets

11. Figure 4-2: AOS Transfer Frame Primary Header Transfer Frame Version Number Spacecraft ID Virtual Channel ID Signaling Flags Master Channel ID Frame Header Error Control (Optional) Virtual Channel Frame Count 2 Octets 2 bits10 bits1 bit 1 Octet3 Octets2 Octets Replay Flag VC Sec Hdr Flag VC Frame Count Usage Flag Spare VC Frame Count Cycle 6 bits1 bit 4 bits