Generic Gateway

Hi all, i´m configuring a new sms provider and this is the SMS URL that i´m using:
FireFOx
https://semysms.net/api/3/sms.php?token=a11173d2XXXXca0ee36d197f21a86c9e&device=12261&phone=+55929812xxxx&msg=Test url send

Can anyone indicate me which values/variable do i have to put in sender, recipients and message fields???. Don´t know exactly which format uses
playSMS
https://semysms.net/api/3/sms.php?token={GENERIC_API_USERNAME}&device={GENERIC_SENDER}&phone={GENERIC_TO}&msg={GENERIC_MESSAGE}