Carrier arbitrage and clearinghouse business is notorious for ultra low margins, especially since long distance calling rates have declined at a tremendous rate. Those who have offered peering/clearinghouse services for VoIP traffic have often talked about value added services. But Stealth’s recent announcement is first such offering I came across in the industry.

New York based Stealth, which operates VoIP peering exchange (VPF), does not even bother to charge its members per minute. It charges a flat fee for a certain MB or GB capacity. With the recent addition of non-voice value added services like SMS and MMS, the company could apply usage based billing. But it has remained faithful to its original flat rate model.