Key Takeaways
- Scenario 172 is drama-studio 09:05 rehearsal-cancel failover — not greenhouse 07:15, DT 08:55, ICT 08:45, science-lab 08:35, or year-photo 08:40.
- A 09:05 that stays on a single SIM when the site radio dies is pupils still walking to the studio, not a tidy MIS log.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime, 1 device. Developer is 25,000 SMS per year.
- Starter is 2 devices; the drama spare still counts.
- Hold PTA CSV until studio DLR drains.
- Canary the drama SIM at 08:45, not at last night’s portal job.
Summary
Scenario 172 is a drama-studio rehearsal cancel: 09:05 parent SMS with a live spare if the site radio dies, PTA CSV held until DLR drains. Service pricing is based on device count and total SMS sent through the gateway. You need a working Android phone with a SIM and SMS credit from your mobile operator. Operator message costs are yours—we do not sell carrier SMS balance.
If lighting fails at 08:58 and the spare is still in a locked props cage, you logged a fault. You did not stop the walk to the studio.
Not a CodeCanyon “school SMS” pack. Device meters apply — Twilio vs Android SMS gateway.
Key takeaways
- Scenario 172 is drama-studio 09:05 rehearsal-cancel failover — not greenhouse 07:15, DT 08:55, ICT 08:45, science-lab 08:35, or year-photo 08:40.
- A 09:05 that stays on a single SIM when the site radio dies is pupils still walking to the studio, not a tidy MIS log.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime, 1 device. Developer is 25,000 SMS per year.
- Starter is 2 devices; the drama spare still counts.
- Hold PTA CSV until studio DLR drains.
- Canary the drama SIM at 08:45, not at last night’s portal job.
Related reading
multi-device and dual SIM routing, how an Android SMS gateway works, device setup, DfE health and safety advice for schools.
Context
Technician isolates lighting at 08:58. Period 2 starts at 09:15. PTA still wants a raffle CSV.
Free (300 SMS lifetime) is a rehearsal year-group. Developer is 25,000 SMS per year.
Core scenario guidance
09:05 is drama cancel HA, not greenhouse 07:15 or DT isolate 08:55. Timezone is the school, not the trust HQ.
Drama failover roles
| Role | When | Typical fail |
|---|---|---|
| 09:05 rehearsal-cancel SMS | School local, before P2 | Primary SIM asleep; spare in a locked props cage |
| Duplicate cancel | Same set_id same morning | Second 09:05 treated as a new blast |
| Staff OTP | Transactional, own pool | Dumped onto the drama radio |
| PTA / raffle | Held until last cancel DLR | Released at 08:50 into studio SMS |
Cost and ownership
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. The drama spare is a billed device. Failover retries burn airtime.
Name an 08:30–10:30 on-call for studio mornings, not only weekday MIS.
Operations
08:45 canary. Abort: hold PTA, keep staff OTP, skip a second “all parents” blast. Do not “resend the year.”
Security and compliance
Short cancel texts. No pupil names in SMS. Authenticate MIS hooks. PTA lists are promotional.
Decision guide
Ship when 08:45 canary is green and the spare is powered in the office, not the props cage. Delay if both radios share one USB. If handsets are forbidden, CPaaS for staff OTP.
Checklist
- Drama SIM paired before 08:30.
- 08:45 canary.
- Spare live in the office.
- Staff OTP isolated.
- PTA held.
- Airtime before 08:30.
- Battery exemptions.
- School locale.
- Studio on-call named.
- Device cap includes spare.
Next steps
Review device and SMS volume pricing, device setup, SMS API documentation.
Deep dive: production hardening
A locked cage at 08:58 is an outage at 09:05. Watch DLR, not MIS 200s.
Deep dive: scaling and failure modes
Two-site drama mornings add devices before inventing a hidden unlimited-handset SKU. Raise OEM ceilings; fair-use remains.
Deep dive: integration discipline
Idempotency on set_id + date + kind (cancel|failover). MCP is a REST wrapper — live fields in Developer Center.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
08:45 drama drill
Canary. Kill the primary. Confirm the spare sends one rehearsal-cancel SMS. Hold PTA during the wave.
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
- OTP and 2FA SMS on AndroidAuthentication flows
- SMS delivery reports (DLR)Delivery status tracking
- SMS API documentationLive endpoint reference
