Hey guys and gals! I just got Asterisk, but now I'm wondering if it's worth getting some add-ons available for this software. I found several of them and would like to know if any of you have tried any of these: G.729 Codec - Reduces the network bandwidth used by each VoIP call, without sacrificing call quality. Fax for Asterisk - Fax For Asterisk is a commercial add-on module that lets Asterisk and Switchvox systems send, receive and relay fax documents. Digium Phone Module for Asterisk - The DPMA is a binary Asterisk module that provides a secure communications channel between Digium phones and Asterisk. Cepstral Text-to-Speech - Add high quality text-to-speech to your Asterisk system with Cepstral's Allison voice. High Performance Echo Cancellation - Echo Cancellation (HPEC) module can help eliminate the most common types of echo heard on PSTN connections. If so, what are your thoughts about them?