Comdasys Mobile Convergence Approach

Today's business cards tell the story: one person, many phone numbers. But they don't speak to the wasted productivity, lost cycles and total cost of ownership that come with managing all of those numbers and devices across an enterprise. The Comdasys Mobile Convergence products enable enterprises to fully leverage their existing network infrastructure as well as their WLAN networks for enabling more efficient voice communication while drastically reducing the cost of mobile communication. This can be accomplished by offering its employees a true one number solution for their fixed line and mobile phones where the Mobile phone can either be connected via GSM or via WLAN while retaining the Enterprise PBX features. Besides Enterprises, Service Providers can use the Comdasys Mobile Convergence to enhance their offering by Voice Features and can thus become Virtual Mobile Operators. This would make special sense to pure ISPs, WISPs (Wireless Internet Service Providers) and IP Telephony Service Providers.

Solution Architecture

The Mobile Convergence system enables enterprises and service providers, to deploy converged applications that now become seamlessly usable on their mobile devices. The Comdasys MC systems allow enterprises to make full use of dual mode phones (WLAN/WiFi - GSM/UTMS/CDMA) by enabling them to use their own wireless infrastructure for voice calls wherever possible. Besides using their own wireless infrastructure, the WLAN capabilities of the dual mode phones can be utilized anywhere in the range of an accessible Hotspot. The Comdasys MC systems enable static as well as dynamic handovers for making sure that the appropriate transport WLAN or GSM/UMTS/CDMA is being used. The Comdasys Mobile Convergence will also make sure that the media path is handled appropriately depending on where the dual mode phone is currently located (e.g. NAT handling for dual mode phone behind a Hotspot) The following picture shows the principal layout of this scenario.

(click on image to enlarge)

Advantages

• Comdasys Mobile Convergence solution seamlessly integrates with and leverages existing equipment while supporting a range of dual-mode handsets
• Supports seamless mid-call handover of voice calls between a circuit-switched domain (cellular) and WLAN (SIP VoIP)
• Enables use of a single phone number (or SIP identity) for all communication
• Developed and tested for interoperability with other VoIP networks and softswitches. Based entirely on open standards.
• Flexible solutions that scale from 30 users to 3000 users. Scale higher through stacking.
• Comdasys Mobile Convergence solution meets advanced security requirements:
• Enhanced Authentication of dual mode devices
• Encrypted Signaling (TLS) over the Internet or LAN
• Termination of SRTP calls for encrypted communication over the Internet / LAN
• VPN tunneling for connecting larger sites in an enterprise network
• Tunneling, firewall traversal done automatically based on necessity (checks if handset is behind NAT, etc.)