Key Takeaways
- A school-bus SMS is a spare-and-route event — not dairy tankers, not snowplows, not city parcel vans.
- Dispatcher SIM and yard SIM stay split. One radio mixing both is how a STOP kills the next bell.
- Free is 1 device, 300 SMS lifetime, and 300 contacts. Developer is 25,000 SMS per year. Platform price is devices plus send volume.
- Portal OTP stays off the depot chassis.
- Idempotency is route-id plus spare-window — yards reissue after a breakdown.
Summary
Scenario 1431 is dual-SIM routing for school-bus depot spare swaps — not snowplow routes, not dairy tankers, not city vans, not touring trucks. A spare rolled. Only dispatch and that yard should hear “route 14 on unit 208.” Service pricing is devices plus SMS send volume. You bring the phones and operator credit. Free is 1 device, 300 SMS lifetime, and 300 contacts.
Starter allows 2 devices: desk dual-SIM plus a spare chassis. Uncapped platform volume is not unlimited carrier SMS. Confirm routing fields in Developer Center.
route · spare · bell
route-id + window — breakdowns reissue spare
A spare-bus hold is not a line-haul delay
Hold copy names the route and the unit. Line-haul “ETA +40” belongs on a different purpose. Mixing them means a driver STOPs after one district blast and never hears the spare lift.
Multi-device and dual SIM, transactional SMS.
If dispatch texts every parent in the district because “something is late,” you will get a complaint. Route to route-id parties only.
School-bus routing matrix
| Event | SIM | Failure |
|---|---|---|
| Spare roll | Desk | Line-haul template reused |
| Yard swap | Yard radio | District dump copied |
| Window reissued | Desk, once | Two “new spare” texts |
| Portal OTP | Auth pool | OTP on the depot radio |
Dispatcher vs yard radio
Persist route-id plus spare-window. Signed callbacks. Webhooks, DLR. MCP wraps REST only.
Route and STOP
Promo “join the booster club” needs STOP on a different ledger. NHTSA school bus is not a reason to SMS the whole district directory.
Devices, volume, and airtime
Winter mornings spike. We meter devices and platform sends. You pay the operator. Free (1/300/300) is one dry-run route.
Yard operations
Charge both chassis before first bell. Setup, Downloads, pricing.
Decision guide
Ship when desk and yard SIMs are split. Delay if one SIM does spares and booster ads. Not a CodeCanyon bus pack.
Depot checklist
- Route-window idempotency.
- Yard copy off district purpose.
- OTP off depot SIMs.
- Reissued spare sends once.
- Developer Center fields confirmed.
Next steps
Scenario 1371 dairy, scenario 1311 snowplow.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- multi-device and dual SIM routingCapacity and failover
- transactional SMS for orders and alertsEvent-driven messages
- SMS delivery reports (DLR)Delivery status tracking
- SMS API documentationLive endpoint reference
