> For the complete documentation index, see [llms.txt](https://wiki.mobivate.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.mobivate.com/api-message-paramaters/send-binary-sms-mt-parameters.md).

# Send BINARY SMS (MT) parameters

When sending *binary* SMS MT messages, in addition to the standard SMS MT message parameters, the following parameters should be sent as part of the HTTP GET request:

| Parameter  | Required? | Description                         |
| ---------- | --------- | ----------------------------------- |
| **UDH**    | Yes       | OCTET Encoded User Data Header (UDH |
| **BINARY** | Yes       | CTET Encoded binary data            |