I am still a newbie in the VOIP industry, and i am pursuing an idea that i have, i am not sure if it is applicable or not though, perhaps you experts can better assist me.
In our Head office, we have a panasonic IP PBX system, connected with 2 external phone lines. We have a DSL internet connection with dynamic IP address.
And then, we have our construction site offices, let us say 1 site office for now. We have an internet connection at this site office using the 3G routers which also has dynamic IP address.
What i want to do is the following:
Install 1 IP phone set in this site office, which via the 3G router can connect to our head office VOIP PBX, so we can reach this site office as an extension. Also this site office can access our phone lines to make external calls.
Of course, both our head office and site office modem routers have dynamic dns capabilities.
So what do you think, is my idea do-able? what kind of hardware/software do we need from asterisk or digium in order to achieve this?