WINSMS

This is really simple to use
Steps
1. First is to download the script SendSMS.php and then place it anywhere where on your server Example */sms/.
2. Edit your command.cfg Example:

define command{
command_name notify-host-by-sms
command_line php yourdirectory/sms/SendSMS.php user="your email" password="Yourpassword" cellno="Cellno" message=$CONTACTPAGER$ "$NOTIFICATIONTYPE$ $SERVICESTATE$ $SERVICEDESC$ $NOTIFICATIONCOMMENT$ Host($HOSTNAME$) Info($SERVICEOUTPUT$) Date($SHORTDATETIME$)"

define command{
command_name notify-service-by-sms
command_line php yourdirectory/sms/SendSMS.php user="your email" password="Yourpassword" cellno="Cellno" message=$CONTACTPAGER$ "$NOTIFICATIONTYPE$ $SERVICESTATE$ $SERVICEDESC$ $NOTIFICATIONCOMMENT$ Host($HOSTNAME$) Info($SERVICEOUTPUT$) Date($SHORTDATETIME$)"
}

3. Edit your contact.cfg Example:

define contact{
contact_name your user
use generic-contact
alias your user
service_notification_options s
host_notification_options s
email your email
host_notification_period 24x7
service_notification_period 24x7
host_notification_commands notify-host-by-sms
service_notification_commands notify-service-by-sms
}

Thats all easy ^_^

Ideal for downtime schedules for your servers