Mobile carriers get the message: customers want MMS interoperability.The CDMA (Code Division Multiple Access) A method for transmitting simultaneous signals over a shared portion of the spectrum. The foremost application of CDMA is the digital cellular phone technology from QUALCOMM that operates in the 800 MHz band and 1.9 GHz PCS band. Development Group (CDG) and 3G Americas, which champions GSM-related technologies (TDMA (Time Division Multiple Access) A satellite and cellular phone technology that interleaves multiple digital signals onto a single high-speed channel. For cellular, TDMA triples the capacity of the original analog method (FDMA). , GSM, GPRS (General Packet Radio Service) The first high-speed digital data service provided by cellular carriers that used the GSM technology. GPRS added a packet-switched channel to GSM, which uses dedicated, circuit-switched channels for voice conversations. , EDGE, and UMTS), don't often agree on much. But, these two organizations are working together on guidelines for inter-carrier multimedia messaging service See MMS. (MMS) in the Americas. MMS is all extension to short message service (SMS) protocol, and it defines a way to send and receive, almost instantaneously, wireless messages that include text, images, audio, and video. The MMS guidelines are the result of work done in technical workshops from both the CMDA and GSM camps. The joint effort is geared toward identifying what it will take to let customers of one mobile service provider send MMS messages to customers of any other mobile service provider running a CDMA or GSM network. "Just as inter-carrier, inter-technology interoperability for short message service (SMS) broke down the barriers and greatly contributed to the immense uptake of the service by wireless customers, this step toward MMS interoperability is crucial for a similar mass adoption of MMS services in the Americas," says Perry LaForge, CDG executive director. MMS was first available commercially more than two years ago and is now offered globally by more than 215 GSM and CDMA operators, according to EMC (1) (EMC Corporation, Hopkinton, MA, www.emc.com) The leading supplier of storage products for midrange computers and mainframes. Founded in 1979 by Richard J. Egan and Roger Marino, EMC has developed advanced storage and retrieval technologies for the world's largest companies. World Cellular Database. http://www.cdg.org; http://www.3gamericas.org |
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