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Operating a Calling Card system nowadays is very competitive business, with hundreds of players in each region or area. Some of them invent very complex marketing tricks to convince potential buyer th... Read More

Read here how to configure SIM predialer - a simple add-on to the mobile phone which allows making c... Read More

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This two-step Signup process will create your Account with dtlvoip. Additionally You will receive free Hosted Billing and Switch Demo account which will show you all features of our software. The demo is fully functional with no limitation to any of the features of live production systems