The second market adjacency I’d like to talk about is video. As we have said many times before, I believe that video is the killer application that will drive next generation productivity and innovation. To give you some additional color on our progress in this area, we talked earlier about tele-presence revenues once again growing in excess of 100% year over year, a proof point that our customers truly understand productivity and value that video delivers internally and with their own customers and partners.
In Q1, we conducted 77,000 Cisco internal meetings, had another record quarter in terms of units old, selling over 570 systems and adding approximately 85 new customers. We just recently celebrated our three-year anniversary since launching tele-presence and since that time, we have conducted more than 0.5 million internal hours of meeting and 427,000 meetings, to be exact.
These are staggering figures and our customers are also experiencing a high usage patterns. Today we have over approximately 500 customers and almost 3,200 systems sold to date.
You have also recently seen us make strategic announcements around Tamburg and Norway, digital video networks in China, pure digital early this year in the U.S. We believe we are well-positioned to take advantage of this major market transition as network plays a key role in transforming how we communicate and collaborate. Video is very much an art as well as a science and media net is our architectural solution to enable access to any content on any device on any network. Media net can adjust real-time, change aspect ratios, bit rate and file formats to optimize traffic and the users’ experience. This is something that plays to Cisco's core strengths and we feel we are well-positioned with our service providers and enterprise customers to take advantage of this unique market transition.