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| Parameter | Description |
|---|---|
| port (string) | Name of port from /port list that GSM modem is attached to. |
| phone-number (string) | Recepient phone number. Allowed characters are "0123456789*#abc". If first character is "+" then phone number type is set to international, otherwise it is set to unknown. |
| channel (integer) | Which modem channel to use for sending. |
| message (string) | Message contents. It is encoded using GSM 7 encoding (UCS2 currently is not supported), so message length is limited to 160 characters (characters ^{}\[]~ |
| smsc (string) | |
| type (string) | If set to class-0, then send class 0 SMS message. It is displayed immedeately and not stored in phone. |
| sms-storage (string) | Select storage where to save received SMS (modem/sim) |
USSD messages
USSD (Unstructured Supplementary Service Data) messages can be used to communicate with mobile network provider to receive additional information, enabling additional services or adding funds to prepaid cards. USSD messages can be processed by using AT commands (commands can differ or even may be blocked on some modems).
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