| Product sheet | Product sheet Ontech GSM 9040 |
| Quick start Guide | Quickstart Guide Ontech GSM 9040 (Ontech Control) |
| Quickstart Guide Ontech GSM 9040 (SMS) | |
| Reference Manual | Reference Manual Ontech GSM 9040 |
| Reference Manual Ontech GSM (SMS communication) | |
| SMS commands | 005 SMS Commands for Ontech GSM |
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