Position of iBSC in Network

When TC is internal, the position of ZXG10 iBSC (V6.20) in the

network is shown in Figure 1.

When TC is external, the position of iBSC in the network is shown in Figure 2.

 ZXG10 iBSC (V6.20) is a part of GERAN (the GSM/EDGE Radio Access Network). GERAN includes one or multiple BSSs, and one BSS consists of one BSC and one or multiple BTSs. BSC is connected with BTS via Abis interface, and BSC-BSC, BSC-RNC are connected with each other via Iur-g interface. If TC is internal, GERAN is connected with GSM/UMTS Core Network via A/Gb/Iu interface. GERAN has two working modes: A/Gb mode and Iu mode and can work in these two modes at the same time. In this case, the 2G MS uses A/Gb working mode, the working mode used by the MS supporting Iu mode depends on GERAN and MS together.