Having your asterisk server on the public internet saves you from dealing with NAT/firewall issues, but means you will have people wandering by and testing to see if your doors are locked. This article outlines how to block IP addresses that attempt to break into your system.
Recording calls on a PBX is easy, since the audio is already in a digital form. This article outlines three ways to setup call recording (or “call monitoring” in asterisk-speak).
A simple SIP header gives distictive rings on the Aastra 9133i without having to setup multiple lines.
The default asterisk install requires you to switch to the root user to run asterisk commands. This post describes how to create a tiny executable that allows you to run asterisk commands as a regular user.
Follow along with the identification and fix of a problem where it was taking almost 10 seconds for an extension to ring, after the extension’s number had been dialed.