What is Voice over Internet Protocol (VoIP)? Is a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks.

ETA (Cisco phone services): Fast VAT calculator (English)

Short video (in English) about using Fast VAT calculator in ETA system. You can fast calculate VAT and other taxes on your Cisco IP phone. Download this software for free and get more services you can on www.entelap.com...

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