SMS server tools for GSM modems The SMS server tools allow setting up a central SMS gateway. It sends and receives SMS messages using a simple file-based interface. It can accommodate up to 20,000 messages a month. It supports an event-handler option that allows calling customized programs or scripts after sending or receiving SMS messages. The SMS Server Tools use one or more (max. 32) GSM modems to send and receive SMS messages. Some modems may be equipped with SIM cards such as Vodafone or Telmi ones. All messages are sorted in queues by the provider. If one modem fails, it will be deactivated for one hour before the software retries, while other modems run without any restriction. The status information and alarms are logged with syslog.