Browse articles on provisioning IP phones and troubleshooting PBX-related problems. Learn new ways to configure your phone system and maximize its functionality. Access Knowledgebase

User Guide

Read the official user guide and learn how to setup all of its built-in features. Read this guide for tutorials on call flow management (mobile app included) and softphone creation. Access User Guide


Frequently asked questions (FAQ) are listed questions and answers, that are commonly asked. These FAQs will help answer many questions you have in mind concerning our services. Access FAQs

Asterisk Placed behind a Router

Asterisk behind a router needs ports forwarded to process calls and transmit audio successfully both ways.

Users can resolve data blockages by forwarding ports on the firewall and network device. Doing so opens a window to the outside that allows otherwise restricted data to enter the LAN.

Via the router or firewall’s main menu, locate “Port Range Forwarding.” Adjust the ranges for the VoIP phone or analog telephone adaptor (ATA). Set a static IP address for the device if not already configured as such.

For the "Start" and "End" fields, enter the following values:

  • For SIP, open 5060 through 5065 (protocol: UDP);
  • For RTP, open ports 10,000 to 20,000 (protocol: UDP).

Save the settings and place a phone call to check if these changes take effective. If not, run port tests with third-party scanners or ask the provider for help.