SDAA112 September   2025 AM625

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Use Case
  5. 2Platform and Products
    1. 2.1 Hardware
    2. 2.2 Software
  6. 3Methods
  7. 4Overview of Steps to Bring Up the Interface and Establish A Connection
  8. 5Troubleshooting
    1. 5.1 Power and Initialization First
    2. 5.2 Verify Network Before PPP
    3. 5.3 Test Manual Dial First
    4. 5.4 Timing When Dialing Up
    5. 5.5 Serial Communication
    6. 5.6 Chat Script
    7. 5.7 PPP Options
    8. 5.8 Signal Strength and Antenna Setup
    9. 5.9 Modem Reset
  9. 6Summary
  10. 7References

1 Use Case

In many applications, a reliable gateway to the internet is necessary to enable communication, monitoring, or control of remote devices. Cellular modems provide an effective design when a traditional wired connection is not feasible, or when wireless (for example, 802.11) coverage is inconsistent. By leveraging PPP, a processor can seamlessly integrate a cellular modem as a network interface.

One significant application is in electric vehicle charging stations in dense urban environments. Building structures often attenuate or block Wi-Fi signals, limiting connectivity for payment processing or grid negotiation. Ethernet can be used in principle, but physical access to wired infrastructure is frequently restricted by security concerns or cost. A cellular modem provides an attractive alternative, offering a secure and dedicated path to the internet.

Building automation is another sector where PPP over cellular is useful. Many installations require coverage in remote corners of a facility where Wi-Fi cannot reach. Cellular connectivity provides a reliable and maintainable means of enabling communication without dependency on wired backhaul (e.g Ethernet or fiber optic cables). PPP is also widely adopted in transportation and logistics, where long-haul trucking and delivery fleets depend on cellular links to maintain reliable communication across wide geographic areas.