There are plenty of step-by-step articles out there. Personally, I use FreePBX to manage an Asterisk system with Grandstream, Cisco and Siemens endpoints. Any

There are plenty of step-by-step articles out there. Personally, I use FreePBX to manage an Asterisk system with Grandstream, Cisco and Siemens endpoints. Any google search for FreePBX will find lots of guides.