Configurations of GSM/VoIP networks allow the service providers to avoid the local Wired Public Switched Network (PSTN) in communication with a GMS mobile handset. As a result, the high rates charged by telephone companies are avoided.
Xtreme Networks, Inc. currently manufactues Voice Over IP carrier based solutions switches and IP PBX switches in the USA for North and South America and Spain for Europe. Xtreme Networks, Inc. provides cost effective solutions to the Voice Over IP market
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