Advanced
- The majority of PoC server vendors support direct connection via P25 ISSI and DMR AIS.
- Preserves end to end voice call encryption and audio quality.
- No 3rd party gateways are required for this solution, reducing call setup time and contention
Intermediate
- Connecting PoC users to a more complex system such as a trunking networks or systems with an IP dispatch solution, requires a more advanced gateway to prevent contention between systems.
- In this case, a gateway that connects directly to the system(s) via the IP network can offer better call handling, capacity, and extended features.
| Gateway | RoIP | Radio Control | Server Connection Type |
| JPS NXU-2A | Yes | 4 wire or VOX | Ethernet |
| Global Technologies | Yes | 4 wire + DSP proceed tone detection | Ethernet |
| Cubic Vocality | Yes | 4 wire or VOX | Ethernet or LTE |
- Example RoIP gateways
Basic
- Adding PoC to an LMR system to expand coverage is the most common use case.
- A “Radio over IP” or RoIP gateway is the most common and well adopted method of connecting the two systems together, because the Common Air Interface or CAI can be any analog or digital format.
- RoIP is best suited for blending conventional systems, however trunking talk groups can be supported.