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Text Description: Phone Vendor Pie Chart

The purpose this graphic is to depict the relationship between of the top 4 Internet Protocol and Time Division Multiplexing (TDM) PHX equipment vendors according to 2013 second quarter global revenue share.

The 4 vendors are:

  1. Cisco: approximately 27% revenue share
  2. Avaya: approximately 21% revenue share
  3. Siemens: approximately 9% revenue share
  4. NEC: approximately 8% revenue share

The largest category on the chart is "Other" at approximately 35% revenue share.