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3CX is the developer of 3CX Phone System which is an open standard unified communications platform for Windows that works with standard SIP phones and replaces any proprietary PBX. 3CX Phone System is more manageable than standard PBX systems and delivers substantial cost savings while increasing productivity. Some of the world’s leading companies and organizations use 3CX Phone System, including Boeing, Mitsubishi Motors, Intercontinental Hotels & Resorts, Harley Davidson, City of Vienna and Pepsi.