Global IP Telephony Market Overview and Forecast to 2025 (Ascom Holding, Avaya Inc., Cisco Systems) – Press Release – Digital Journal

Mang. Const.

Global IP Telephony Market Overview and Forecast to 2025 (Ascom Holding, Avaya Inc., Cisco Systems) – Press Release  Digital Journal

Global IP Telephony Market by Geography: North America, Europe, South America, the Middle East, Africa and Asia Pacific.Methodology.

Source: Mang. Const.