MCI Communications Corporation
Worldcom
MCI WorldCom
MCI Communications
WorldCom
世通公司
MCI (기업)
MCI (電気通信事業者)
MCI
MCI Inc.
Mci logo.svg
former telecommunications and networking company
société de télécommunication américaine
Washington, D.C., U.S.
Conferencing, Contact Centers, Data and IP Services, Internet access, IT Solutions and Hosting, Managed Networks, Premises Equipment , Security, Voice, VoIP, Wireless
Acquired by WorldCom