DCom Group LLC Ukraine
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Call Routing VoIP Solutions
- IP devices
- Phone To Phone
- SIP VoIP Gateway
- System Integration
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“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.
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