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How Cisco is Using SIP Trunks to Reduce Calling Costs

Like many large enterprises, Cisco makes a lot of phone calls.  Cisco previously used a lot of TDM trunks from multiple carriers to carry thousands of voice calls from our North American Cisco offices to the PSTN. The problem is, we had over 100 TDM trunks we were paying for every month, to carry our voice calls for these sites.  Four years ago we started looking around for a more cost-effective and manageable way to support all these calls.  After a good deal of searching, screening vendors and testing, we finally found it, using Session Initiation Protocol (SIP) trunking technology.

For the Cisco campuses in San Jose and Research Triangle Park (RTP), we will replace over a hundred PRI (23 channel) TDM trunks, used for long-distance voice calls for all of our North American sites, with SIP trunks.  The new San Jose link is a 250 Mbps SIP trunk carved out of a 10 Gigabit Ethernet WAN access line, while the RTP link is a 20 Mbps SIP trunk carved out of a 45 Mbps DS3 WAN access line. Together, these SIP trunks give us the capacity to carry over 2400 concurrent calls and a total voice call volume of 2 million minutes per month.
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This Old Data Center

February 22, 2012 at 10:00 am PST

For this week’s Data Center Deconstructed we’re setting the Wayback machine to 1998, when Cisco opened a new engineering Data Center at its headquarters in San Jose, California.

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Collaboration is Hot … A Report from Social Media Week

Along with my colleague Carlos Dominguez, I had the pleasure of co-keynoting the opening session this week at the Cisco-sponsored day of Social Media Week, a 21-city global forum that brings together company gurus of social media, and those who want to learn more about emerging trends in social and mobile media and share best practices. Read More »

Security Practices for Online Collaboration and Social Media

February 10, 2012 at 9:00 am PST

In my last blog we discussed how on-line tools for desktop sharing, audio and video collaboration, and enterprise social software play an increasingly important role in corporate business. We discussed how the industry is also seeing a trend toward “IT consumerization,” where employees and other users experience new technologies before they are supported by enterprises. The first impact of this trend is producing more employee requests to access their personal social media accounts from their work computers as a way to manage both work and life responsibilities. The even bigger impact is that employees want to use these types of collaboration tools for enterprise business purposes.
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Collaboration is Hot … Mobility and Security

As you know from my previous blog, Cisco IT has just crossed the 50,000 mobile device deployed milestone – a mix of iPhones, Android and Blackberry devices.  We are thrilled with our progress and believe there are two factors that have driven our success: Read More »