According to Eric Krapf of No Jitter blog, SEN’s owner, Gores Group, wanted to buy Polycom in 2009:
The FT article reports that Gores approached Polycom last October about an acquisition but was turned down. I interviewed then-Siemens CEO Mark Stone in November and he made it clear that Gores would be aggressively pursuing acquisitions to bolster SEN. Stone, a top Gores Group exec, stepped in as SEN CEO when James O’Neill left the company; a new CEO, Hamid Akhavan, was named in December.
No doubt a move to counter Cisco’s acquisition of TANDBERG. It appears that the video conferencing market is heating up in light of news about a Polycom bidding war and M&A activity.