DEG/CN-03015 (EG 201 027)
| Business TeleCommunications (BTC); | 1.1.1 |
DES/HF-01018 (ES 201 275)
| Human Factors (HF); | 1.1.1 |
DTR/BTC-01001 (TCRTR 033)
| Business TeleCommunications (BTC); | |
DTR/NA-025101 (TCRTR 021)
| Integrated Services Digital Network (ISDN); | |
DTR/IMCC-00002 (TCRTR 024)
| ISDN Management and Co-ordination Committee; | |
DTR/BT-01002 (TCRTR 010)
| Business Telecommunications (BT); | |
DTR/BTC-01026 (TCRTR 018)
| Private Telecommunication Network (PTN); | |
DTR/IMCC-00004 (TCTR 001)
| ISDN Management and Co-ordination Committee; | |
REN/ECMA-00259 (EN 301 819)
| Private Integrated Services Network (PISN); | 1.2.1 |
REN/SPAN-020096 (EN 300 357)
| Integrated Services Digital Network (ISDN); | |