2 Network architecture
3GPP43.045Release 17Technical realization of facsimile group 3 transparentTS
The network architecture applicable to this Teleservice is shown in figure 1/43.045, below.
Figure 1/43.045: Network architecture
This shows the case of mobile to fixed network interworking. For mobile to mobile calls, there would effectively be a loop back within the PLMN, using two IWFs.