| CN | CN1 | CN2 | CN3 | CN4 | CN5 |
| CT | CT1 | CT3 | CT4 | CT5 | CT6 |
| GERAN | GERAN1 | GERAN2 | GERAN3 | GERAN4 | GERAN5 |
| RAN | RAN1 | RAN2 | RAN3 | RAN4 | RAN5 |
| SA | SA1 | SA2 | SA3 | SA4 | SA5 |
| T | T1 | T2 | T3 |

TSG Radio Access Network (TSG RAN)

Overview:

TSG Radio Access Network (TSG RAN) is responsible for the definition of the functions, requirements and interfaces of the UTRA network in its two modes, FDD & TDD. More precisely: radio performance, physical layer,  layer 2 and  layer 3 RR specification in UTRAN; specification of the access network interfaces (Iu, Iub and Iur); definition of the O&M requirements in UTRAN and conformance testing for Base Stations.