O.S.S Corporation began to offer IP telephony and Internet services in the middle of 1999 year. In spring of 2000 it was on the top of independent ratings of the Russian IP telephony operators. Nowadays company owes the most powerful access pool to provid
Provide wholesale international callback service in China for voip service providers and call shops. We offer competitive price and billing system to our wholeseller. We are using SS7 PSTN line and no connection fee to customers.
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