41 Series: Requirements
| 41.031 | Fraud Information Gathering System (FIGS); Service requirements; Stage 0 |
| 41.033 | Lawful Interception requirements for GSM |
| 41.061 | General Packet Radio Service (GPRS); GPRS ciphering algorithm requirements |
| 41.101 | Technical Specifications and Technical Reports for a GERAN-based 3GPP system |