AceTech Singapore
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Internet VoIP and Video Conferencing Service Provider
- Voip Termination ISP
- Call Relay VoIP Solutions
- Call Routing VoIP Solutions
- IP devices
- Outsourced Billing
- Partnering for Origination and Termination
- PC to Phone
- Phone To PC
- Phone To Phone
- SIP Softswitch & CPE
- System Integration
- Termination
- Web Call
- Web To Phone
- Cisco Systems
- Huawei VoIP Products
- Quintum
- another
- VoiceMaster
“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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