US Patent 8131556 Communications using different modalities

Communications between users of different modalities are enabled by a single integrated platform that allows both the input of voice (from a telephone, for example) to be realized as text (such as an interactive text message) and allows the input of text (from the interactive text messaging application, for example) to be realized as voice (on the telephone). Real-time communication may be enabled between any permutation of any number of text devices (desktop, PDA, mobile telephone) and voice devices (mobile telephone, regular telephone, etc.). A call to a text device user may be initiated by a voice device user or vice versa.