| Figure 5-1 | Communication scenario with MTC devices communicating with MTC server. MTC server is located in the operator domain. |
| Figure 5-2 | Communication scenario with MTC devices communicating with MTC server. MTC server is located outside the operator domain. |
| Figure 5-3 | MTC Devices communicating directly with each other without intermediate MTC server |
| Figure 7-1 | MTC server and the MTC Device in the public IPv6 address space |
| Figure 7-2 | MTC Server in a public or private IPv4 address space, MTC Device in a private IPv4 address space |
| Figure A-1 | Congestion in mobile core network and on the link between mobile core network and MTC Server |
| Figure A-2 | Signalling network congestion |
| Figure A-3 | Access Control with billing plan |
| Figure A-4 | End-to-end security for roaming MTC devices |