Hawk, I don't know what Sonus' policy is but normally it isn't a matter of you having to buy them new so much as that they were sold new thru the dealers distribution chain in the first place. Some manufacturers only restrict their objections to warranty issues but some others will not sell you parts OR even service the unit at you expense.
You really need to pin down what Sonus' actual policy is and move ahead accordingly. You can probably get this info from their distributor.
You really need to pin down what Sonus' actual policy is and move ahead accordingly. You can probably get this info from their distributor.