Company
About Us
Contact Us
Products
IP Telephones
VoIP ATAs(FXS)
PSTN Bypass Gateways
VoIP FXO Gateways
Hybrid Gateways
VoIP GSM Gateways
SIM Bank / SIM Server
Cross-Network Gateways
Download
User Manuals
Softwares
Contact Us
HK TEL:+852 29941338
Shenzhen TEL:+86 755 88290211
FAX:+852 39092338
E-mail:sales@dbltek.com
Agent Wanted Now [01-01-2012]
SIM Bank avaliable now [09-05-2011]
The lastest Firmware Version[11-02-2011]
Unlimited Global Free Calling[06-28-2011]
DDNS P2P Configuration [06-28-2011]
Agent Wanted[01-01-2011]
New product Cross-Network Gateway[03-17-2010]
GSM Gateway avaliable now
Solution to VoIP Blocking
VoIP customers around the world have experienced that their calls cannot be connected because telecom companies are blocking the movement of such traffic across the Internet.

We have developed a proprietary technology, named Relay Server, to prevent VoIP traffic from being blocked. All our products support this relay mode and we offer the Relay Server software to our customers for free.