Compass International Co., Ltd China
- Hosted VoIP billing service provider
- International VoIP Wholesale Provider
- VoIP Billing Software Provider
- Termination
- Cisco Systems
- another
“Extension” - is the extension of the telephone line (PBX) or the Centrex system. It works as an association and allows calling to certain telephone sets without the necessity of dialing the telephone number, but only by dialing a short combination of digits, reaching the desired subscriber.
Skyvia Telcom Communications Co., Ltd
Skyvia Telcom is an international voice wholesale carrier
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