I am looking for the best method to connect to a definity pbx with the ip soho. I have yet to purchase the unit, so I am looking for the best configuration. Any help would be appreciated.
If by upgrading you mean adding ports, you are correct. You can add a T1/PRI or WAN card in the back (or BRI if you don't live in North America) but that's it.
You CAN upgrade the firmware like any other IPO, however.
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