Dr. Tal Lavian – Telecommunications, Network Communications, Internet Protocols (TCP/IP), and Mobile Wireless Expert

A scientist, educator, and technologist with over 30 years of experience, Dr. Lavian is an expert in telecommunications, network communications, mobile wireless, and Internet Protocols (TCP/IP). He offers expert witness services in these and other technology fields.

Dr. Lavian has co-authored over 25 scientific publications, journal articles, and peer-reviewed papers. He is an inventor of over 120 issued and filed patents.

Areas of Expertise:

Dr. Lavian has extensive experience in the software development of network protocols, designs, architectures, configurations, installations, and network testing. He has academic and hands-on experience in a vast array of varying technology products, implementations, related standards, hardware, system, and software technologies. Areas of expertise include:

  • Network Communications:

Network communications including Internet protocols; TCP/IP suite, TCP, UDP, IP, MAC Ethernet, 802.3, network protocols, network software applications, data link, network, and transport layers (L2, L3, L4), packet switching, data networks, computer networks, and network architectures.

  • Mobile Wireless:

Mobile wireless networks including Wi-Fi, 802.11, Bluetooth, MAC, PHY, Wireless LAN (WLAN). Cellular systems, SMS, MMS, instant messaging (chat), mobile devices, and smartphones.

  • Internet (TCP/IP) and Cloud:

Internet cloud communications including Internet Technologies, Web applications, HTTP, e-mail, SMTP, POP, IMAP, Java, C/C++, file transfer FTP, client-server, cloud computing, and distributed computing.

  • Routing and Switching:

Routing and switching systems, architectures, and protocols Including LAN, WAN, VPN, routing protocols, RIP, BGP, MPLS, OSPF, multicast, DNS, QoS, priority queuing, network infrastructure, and network communication architectures.

  • VoIP and Streaming Media:

VoIP protocols, VoIP systems, streaming media, IP telephony, SIP, RTP,  H.323, MGCP, video/audio conferencing,  multimedia, and video/audio streaming.

  • Telecommunications and Unified Communications:

Telecommunications and unified communications including PSTN, circuit switching, SS7, SONET, TDM, telecom architecture, network infrastructure, network design, switch architectures, network redundancy, and resiliency.


Computer Science specializing in network communications
UC Berkeley

Network Communications Expert

Dr. Lavian earned his Ph.D. from the University of California, Berkeley, in Computer Science, specializing in network communications. He provides expert product and technology consultation in data communications, computer networks, network communications, and Internet technologies.

Dr. Lavian’s expertise includes Internet protocols, TCP/IP suite, TCP, UDP, IP, Ethernet, 802.3, network protocols, network software applications, data link, network, and transport layers (L2, L3, L4), computer networks, and data center network architecture.

Dr. Lavian’s expertise includes Internet protocols, TCP/IP suite, TCP, UDP, IP, Ethernet, 802.3, network protocols, network software applications, data link, network, and transport layers (L2, L3, L4), computer networks, and data center network architecture.

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Mobile Wireless Expert

Dr. Lavian’s academic background and practical industry experience provide him with a profound depth and breadth of knowledge regarding mobile wireless systems, devices, and networks. He is highly experienced in all aspects of the relationships between wireless applications and their underlying communications service architectures, designs, and implementations.

Dr. Lavian’s expertise in mobile wireless technologies includes Wi-Fi, 802.11, Bluetooth, MAC, PHY, Wireless LAN (WLAN), SMS, MMS, instant messaging (chat), handsets, mobile devices, smartphones, cellular networks, wireless technologies, architectures, standards, systems, and backend infrastructure.


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Internet Protocol Suite (TCP/IP) Expert

Dr. Lavian has expertise in Internet Protocol Suite (TCP/IP), including:

Internet protocols: (TCP/IP): TCP, UDP, IP, MAC, HTTP, VPN, e-mail, SMTP, POP, IMAP, FTP, Telnet, SSH, SNMP, DHCP, DNS, NNTP, POP, SIP, IPv4, IPv6, IPSec.

Architecture and Cloud Computing: Web applications, client-server, cloud computing, distributed computing, peer-to-peer networking, virtual private networks, tunneling, content networking, network security, and mobile applications.

Programming languages and Communications Software: Java, C/C++, software APIs, network configuration and scripting, and network management.

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Routing and Switching Expert

Dr. Lavian has extensive hands-on industry experience coupled with academic knowledge of routing and switching technologies, including:

LAN, WAN, VPN, tunneling, routing protocols, RIP, BGP, MPLS, OSPF, multicast, DNS, QoS, switching, packet switching, layer 2 switching, layer-3 switching, layer-4 switching, application switching, load balancing, and firewalls.

Routers, switches, gateways, and IETF RFC standards which define relevant functional architectures, protocol specifications, and forwarding.

Networking principles, software and hardware architectures, ASIC, firmware, high-speed backplanes, control-planes, data-planes, blocking and non-blocking architectures, priority queuing, time-to-live, packet addressing, and routing/switching table structures.

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Telecommunications, VoIP, SIP, and Streaming Media Expert

As an expert in telecommunications, VoIP, and streaming media, Dr. Lavian has substantial knowledge of integration processes with SIP, Internet protocols (TCP/IP), and PSTN as part of unified communications.

Dr. Lavian draws upon decades of academic and hands-on experience in designing and implementing unified communications solutions, including:

VoIP protocols, VoIP systems, and streaming media, IP telephony, SIP, RTP, SMS, MMS, video/audio conferencing, streaming media, instant messaging (chat), H.323, MGCP, codecs (such as G.711. G.722, G.729), public switched telephone networks (PSTN), circuit switching, SS7, SDH, and SONET.

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More About Me

A scientist, educator, and technologist, Dr. Lavian has been privileged to serve as a Principal Investigator (PI) for DARPA (Defense Advanced Research Projects Agency) projects and for an undisclosed classified wireless research project for a federal agency.

Dr. Lavian has directed a networking computation project for the US Air Force Research Lab (AFRL) and pioneered several technical firsts including leading and developing the first network resource scheduling service for grid computing, managing, and engineering the first demonstrated dynamic transatlantic allocation of 10Gbs Lambdas as a grid service, and developing and successfully demonstrating the first wire-speed active network on commercial hardware.

Dr. Lavian has patented over 120 inventions, with over 60 prosecuted pro-se in front of the USPTO. He has successfully created and chaired the Enterprise Data Network Patent Committee at Nortel Networks.

Research and Development

UC Berkeley

Dr. Lavian served as an Industry Fellow and Lecturer in UC Berkeley’s Industrial Engineering and Operations Research (IEOR) Department and at UC Berkeley Engineering’s Sutardja Center for Entrepreneurship and Technology (SCET).  He has taken part in UC Berkeley’s startup accelerator, SkyDeck, as principal investigator of the wireless RF signal startup company, CRadar.Ai, and co-founder, CEO, and CTO of smartphone wireless telecommunicators service integrator, Aybell, previously known as VisuMenu Inc.


Dr. Lavian has served as the CTO and principal investigator of CRadar.Ai, a company whose technology improves wireless radio signal phase noise purity by about 100x. The clean wireless radio frequency signal enables the use of a pioneering radar-based object detection system for autonomous vehicles. The startup’s high-accuracy imaging radar complements existing detection systems by sensing objects under poor weather and lighting conditions—fog, rain, snow, direct sun, total darkness—where conventional camera- and lidar-based autonomous driving systems often fail. CRadar.Ai was incubated in UC Berkeley’s startup accelerator, SkyDeck.


A part of UC Berkeley’s SkyDeck, Aybell is focused on creating a new way of connecting smartphone users to any company and service by digitizing interactive voice systems. As CEO, CTO, and a co-founder of Aybell, Dr. Lavian developed a way to transform mobile wireless devices and smartphones into visual menu systems that empower consumers to receive more rapid customer service using mobile applications, social media platforms, chatbots, and browsers.

Dr. Lavian led the design and implementation of the company’s service architecture and the voice menu search engine. Aybell is the branding and marketing name of VisuMenu Inc., advanced technologies, a cloud telecommunications system that provides network communications integration with a service provider’s telephone system.

VisuMenu Inc.

VisuMenu Inc. provides an innovative visual search engine for automated phone menus from mobile wireless devices and smartphones.

As co-founder and CTO of the company, Dr. Lavian led its software development and search engine design for IVR/PBX using Asterisk, SIP, and VoIP.

VisuMenu’s systems are deployed as a front-end mobile device interacting with Web services. Its back-end is based on cloud network communications, telecommunications, and cloud computing services via Amazon Web Services (AWS) and Google Cloud Platform (GCP). VisuMenu Inc. has since been re-branded as Aybell.