Organizations looking to enable greater mobile productivity for the estimated 50 million on-campus mobile workers in the U.S. can now do so through their existing WLAN deployments using the BlackBerry WLAN solution. Research In Motion Limited is showcasing the BlackBerry WLAN solution, including the 802.11-enabled BlackBerry 7270 handheld, at VoiceCon this week. The BlackBerry 7270 wireless handheld connects through BlackBerry Enterprise Server to provide support for secure, push-based email, instant messaging, organizer, Internet and intranet applications and to make and receive wireless VoIP calls through enterprise telephone systems via the industry-standard SIP (session initiation protocol).