IPMA Technologies Hong Kong
- Internet VoIP and Video Conferencing Service Provider
- Voice and Video Conferencing
- Cisco Systems
- Telco Solutions Billing System
It is a type of communication between two ordinary phones, which are connected and voice transmits over telecommunication network.
VASC Company
Please visit this link to test our quality http://vasc.com.vn/template/default/page/other/FormVOIP.aspx
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