Background
Xplorium is one of the biggest international wholesale VoIP carriers, with a significant international presence: Europe, the United States, the Middle East, Latin America and Africa. One of the company’s specialities is carrying the international traffic of GSM operators in addition to many other varied retails services. In a number of locations the traffic is carried via satellite and this gives rise to concerns about the voice quality and the efficiency of transmission. In 2007 Xplorium were looking for equipment for their VoIP PoPs that would address these issues.

WTL Solution
WTL proposed several products for different parts of the Xplorium network. The key factor was to use WTL’s patented NOP (Network Optimisation Protocol) bandwidth saving technology. Simply put, this technique packs multiple VoIP voice samples into a single IP packet. Because the samples are not modified, quality is unaffected but, on multi-call links, significant savings can be made on the packet overhead. Also, since single samples are taken from each active call rather than queuing multiple samples from the same call, delay is not increased.