1. Nation technical regulation on physical/ electrical characteristics of hierarchical digital interfaces (Code: QCVN 2:2010/BTTTT).
2.. National technical regulation on bit error rate of digital transmission path (Code: QCVN 3:2010/BTTTT).
3. National technical regulation on connection characteristics of synchronous digital hierarchy (SHD) leased line (Code: QCVN 4:2010/BTTTT).
4. National technical regulation on quality of 2 048 kbit/s digital structured leased line (Code: QCVN 5:2010/BTTTT).
5. National technical regulation on network interface of 2 048 kbit/s digital unstructured and structured leased lines (Code: QCVN 6:2010/BTTTT).
6. National technical regulation on optical interfaces for network interconnection equipments relating to the synchronous digital hierarchy (Code: QCVN 7:2010/BTTTT).
7. National technical regulation on electromagnetic exposure from public land mobile base stations (Code: QCVN 8:2010/BTTTT).
8. National technical regulation on earthing telecommunication stations (Code: QCVN 9:2010/BTTTT).
9. National technical regulation on Cordless Telephone Equipment (Code: QCVN 10:2010/BTTTT).
10. National technical regulation on PHS terminal equipment (Code: QCVN 11:2010/BTTTT).
11. National technical regulation on GSM mobile stations (phase 2 and 2+) (Code: QCVN 12:2010/BTTTT).
12. National technical regulation on 800 MHz CDMA 2000-1x mobile station (Code: QCVN 13:2010/BTTTT).
13. National technicala regulation on cellular mobile CDMA 2000-1x base station equipment (Code: QCVN 14:2010/BTTTT).
14. National technical regulation on mobile station for W-CDMA FDD (Code: QCVN 15:2010/BTTTT).
15. National technical regulation on base station for W-CDMA FDD (Code: QCVN 16:2010/BTTTT).
16. National technical regulation on electromagnetic compatibility and radio spectrum for transmitting equipment for the anologue television broadcasting service (Code: QCVN 17:2010/BTTTT).
17. National technical regulation on general electromagnetic compatibility for radio communications equipment (Code: QCVN 18:2010/BTTTT).
18. National technical equipment on general requirements telecommunications terminal equipments to be connected to an anologue subscriber interface in the PSTN (Code: QCVN 19:2010/BTTTT).
19. National technical regulation on general requirements of telecommunications terminal equipments connected to the public telecommunications networks (PTNs) using digital leased circuits at data rates of n x 64 kbit/s (Code: QCVN 20:2010/BTTTT).
20. National technical regulation on general requirements of telecommunications terminal equipments connected to the Public Telecommunications Networks (PTNs) using 2 048 kbit/s digital structured leased line (Code: QCVN 21:2010/BTTTT).
21. National technical regulation on electrical safety of telecommunications terminal equipments (Code: QCVN 22:2010/BTTTT).
The Circular shall be valid after six (06) months since the date of signing.