BroadSoft Inc. (Nasdaq: BSFT) shares jumped 13.6% to $26.93 after the telecommunications-software maker’s forecast 2011 earnings that topped Wall Street’s consensus estimate. Volume of 4.4 million shares trounced a daily average of less than 700,000.

A news release out Monday, August 8 proclaimed that the Gaithersburg, Maryland-based BroadSoft achieved revenues increased 63% year-over-year to $32.2 million, that license revenue increased 82% year-over-year to $19.2 million

Net income for the second quarter of 2011 was $15.8 million, or $0.57 per diluted common share, compared to a net loss of ($1.8) million, or $(0.20) per basic and diluted common share, for the second quarter of 2010. In addition, GAAP results for the second quarter of 2011 included an income tax benefit of $9.9 million, or $0.36 per diluted common share, resulting from the release of a tax valuation allowance relating to net deferred tax assets.

BroadSoft CEO Michael Tessler was quoted in the same release as saying, “We continue to see demand across our product line grow globally, helping drive our record second quarter financial results. We believe our financial performance for the first half of 2011 demonstrates our ability to execute our long-term strategy of enabling our customers to deliver innovative, real-time communications services to their subscribers.”

For the full year 2011, BroadSoft is increasing its guidance and now expects revenue of $127.0 to $130.0 million, reflecting growth of 33% to 36% over 2010 revenue of $95.6 million.

BroadSoft provides software that enables mobile, fixed-line and cable service providers to deliver voice and multimedia services over their IP-based networks.