Abstract: A cellular phone accessory device (47) combined with an IMS client (31) is implemented to provide real time interactive multimedia applications to low end phones (36) and middle range phones (40) without having to re-engineer said phones. Said device behaves as a cellular phone accessory and IMS client that is implemented using client control, protocol components (32) and IMS client media components (33). Said device comprises of general purpose processor (34) and digital signal processor (35) connected using a DSP bridge (46).

Abstract: A hands free cellular phone system combining a full featured cellular phone with a form factor of a conventional audio cassette is provided. Several embodiments enabling real time interactive multimedia applications are also provided. Said hands free cellular phone system comprises a cellular phone device (1) in form factor of a conventional audio cassette (9). Device (1) can be inserted into any conventional audio cassette player (22) to transfer audio content into conventional audio cassette player (22) by using electromagnetic coupling with electromagnetic transducer (28) of said device (1) and electromagnetic transducer of conventional audio cassette player (35). Said device (1) provides a full featured, forward compatible, low installation cost hands free cellular phone system.

Abstract: A security system (52) using cellular wireless half duplex communication call (62) is provided. The security system (52) comprises a set of monitored resources (10), group of owners (48) and group of helpers (50) connected using said cellular wireless half duplex call (52). The monitored resource (10) is configured to generate an alarm and is coupled with said cellular wireless half duplex call (62). Said owners (48) and helpers (50) are also coupled with said cellular wireless half duplex call (62). In an event of emergency said monitored resource (10) generates an alarm and initiates said cellular wireless half duplex call (62) to connect to said owners (48) and said helpers (50) in shortest possible time without significantly contributing to cellular network load. Said security system (52) provides most scalable, efficient and viable security solution using cellular wireless networks.