A flow control system and method in a global system for mobile communication (GSM) mobile telephone system for short message service (SMS). The SMS enables short text messages to be sent to and from mobile stations. The system and method is directed to a control for a service for messages sent to MSs...http://www.google.com/patents/US5579372?utm_source=gb-gplus-sharePatent US5579372 - Flow control method for short message service - busy subscriber
