1.  a) Stored Program Control b) Switching Processor Control c) Switched and Program Circuit d)  2.  a)  b)  c) 2 dây 4 dây d)  3.  a)  b)  c)  d)  4. -- a)  b)  c)  d)  5. 1. a) 2.048Kbit/s b) 8Mbit/s c) 8,448Kbit/s d) 8,448Mbit/s 6. 2. a) 2.048Kbit/s b) 8Mbit/s c) 8,448Kbit/s d) 8,448Mbit/s 7. 3. a) 2.048Kbit/s b) 34,368 Mbps c) 8,448Kbit/s d) 8,448Mbit/s 8. 4. a) 2,048 Mbps b) 8Mbps c) 139,264 Mbps d) 8,448Mbps 9. 5. a) 2,048 Mbps b) 564.992 Mbps c) 139,264 Mbps d) 8,448 Mbps 10. 2. a) Xen bit b) Xen byte c) Xen word d) Xen frame 11.  PDH? a) 2 b) 3 c) 4 d) 5 12. 1? a) TS0 b) TS16 c) TS31 d)  13. 1. a) 256 b) 125 c) 2.048 d) 8.000 14. 1. a) 256 b) 125 c) 1544 d) 193 15. 1 2.048Kbit/s  ? a) TS0 b) TS1 c) TS16 d) TS31 16. ? a) FDM b) TDM c) WDM d)  17. 1. a) 250 microgiây b) 125 microgiây c) 2,048 microgiây d)  18. ? a) Audio b) Image c) Video d) TV 19. 30 voice channel timeslot trong khung E1 (PCM-30). a) 250ms b) 125ms c) 125µs d) 4,9µs 20. 1? a) 1 b) 4 c) 16 d) 64 21. Cho 1 (PCM-30). a) 250ms b) 125ms c) 125µs d) 0,49µs 22. 1? a) 30 b) 32 c) 480 d) 1920 23. E1  ? a) 24 b) 30 c) 31 d) 32 24. 2? a) 30 b) 120 c) 480 d) 1920 25. 3? a) 30 b) 120 c) 480 d) 1920 26. 4? a) 30 b) 120 c) 480 d) 1920 27. 5? a) 120 b) 480 c) 1920 d) 7680 28. 1? a) HDB3 b) AMI c) HDB3 và AMI d) CMI 29. 2? a) HDB3 b) AMI c) HDB3 và AMI d) CMI 30. 3? a) HDB3 b) AMI c) HDB3 và AMI d) CMI 31. 4? a) HDB3 b) AMI c) HDB3 và AMI d) CMI 32. 5? a) HDB3 b) AMI c) HDB3 và AMI d) CMI 33.  a) Châu Âu b)  c)  d)  34.  a) Châu Âu b)  c)  d)  35.  a) Châu Âu b)  c)  d)  36. ? a)  b)  c)  d)  . a) 2. 048 Kbit/s b) 8Mbit/s c) 8 ,44 8Kbit/s d) 8 ,44 8Mbit/s 6. 2. a) 2. 048 Kbit/s b) 8Mbit/s c) 8 ,44 8Kbit/s. 8 ,44 8Kbit/s d) 8 ,44 8Mbit/s 7. 3. a) 2. 048 Kbit/s b) 34, 368 Mbps c) 8 ,44 8Kbit/s d) 8 ,44 8Mbit/s 8.