A telecommunications device includes a broker module that translates telephone, mail and presence status information into short coded plain-text strings suitable for transmission over low-speed, high latency, high-cost IP networks. The broker module further transmits and receives such messages, to allow...http://www.google.de/patents/US20050037741?utm_source=gb-gplus-sharePatent US20050037741 - System and method for telephonic presence via e-mail and short message service
