FOXBOX DOCS Official documentation

FoxBox supports the binary messages, a particular kind of SMS containing 8-bit binary data. Thanks to this particular feature, it is possible to send simple images or animations and ringtones.

The following is an example of SMS binary format for sending a ringtone:

To: 393408045678
Alphabet: binary
Hex: yes
UDH: true

6E 0C 6C 00 42 45 47 49 4E 3A 49 4D 45 4C 4F 44 59 0D 0A 56 45 52 53 49 4F 4E 3A 31 2E 32 0D 0A 46 4F 52 4D 41 54
3A 43 4C 41 53 53 31 2E 30 0D 0A 4D 45 4C 4F 44 59 3A 2A 33 62 33 2E 63 34 64 33 65 33 64 33 63 33 2A 33 62 32 67 
33 2E 67 34 23 66 33 65 33 64 33 65 33 23 66 33 64 33 67 32 0D 0A 45 4E 44 3A 49 4D 45 4C 4F 44 59 0D 0A 

All you have to do is creating this content inside of a textual file, later using one of the FoxBox APIs to deliver it.