T/TE 10-01 (I-ETS 300 003)
| Business Telecommunications (BT); | |
DES/CN-07001 (ES 201 168)
| Corporate Telecommunication Networks (CN); | 1.1.1 |
REG/CN-07002 (EG 201 050)
| Corporate Telecommunication Networks (CN); | 1.1.1 |
RTBR/BTC-02075 (TBR 004/A1)
| Integrated Services Digital Network (ISDN); | |
DTR/BT-02002 (ETR 016)
| Business Telecommunications (BT); | |
T/TE 10-03 (I-ETS 300 005)
| Business Telecommunications (BT); | |
T/TE 10-02 (I-ETS 300 004)
| Business Telecommunications (BT); | |
T/TE 10-04 (I-ETS 300 006)
| Business Telecommunications (BT); | |
DE/BTC-02003 (ETS 300 283)
| Business TeleCommunications (BTC); | |
DE/BTC-02048 (ETS 300 439)
| Business TeleCommunications (BTC); | |