Unlike the carrier market, where projects are deployed on a less regular basis but bigger in terms of scale, Nortel is counting on a more stable source of revenue out of the enterprise sector.

"In the enterprise market, we can rely on different vertical industries that have different cycles of ups and downs," said Pio De Roda. "For example, call centers are a major market for us right now but as demand levels off in the next few years, we can count on other industries, such as manufacturing, which are likely to adopt VOIP."