> Now it's clear to methat SIP proxy (trunk) is a paid service from > providers..right? >
Not always. Your firewall can run sipproxd and act as a SIP proxy. > You said I can "peer" two elastix boxes or just one elastix box on one > office, does it mean I do not have to avail of the SIP trunk/proxy and/or > voip provider? I can do this using only our existing internet connection? > Would appreciate it if you can point me to any documentation on this that I > can use? > Usually you will only need a commercial provider if you want termination services like if you want to call land line or mobile phones in other countries. In your case, you can have one Elastix server to handle local and regional VoIP phones. But this type of architecture can be problematic for the external VoIP phones especially if they are behind a NAT environment and you will be using SIP protocol. For this kind of setup it will be better if you use IAX protocol but you will have to use VoIP phones that support it. IAX is an open protocol but not a lot of manufactures apply it in their phones. The more costly but better setup would be to have 2 Elastix server running at each site. You can then trunk the 2 sites via IAX. In this case, each site will have local VoIP access even if the other site is down. > "The FXO Card, its in order for your elastix box to connect to PSTN / local > telco." ---- The working FXO port is where I will connect the cable from > PLDT outlet..right? Then the Elastix box NIC is to the switch..right? > Pardon me from not being able to picture the actual connections.. new in > That is correct. However, AFAIK, you need to ask permission from your telco if you will connect their line to a VoIP server. You need to do this specially if it will be heavily used. They have systems in place to detect these things. In the past, they have been active in running after companies that provide illegal termination services. Holden
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