MeshDynamics First With Persistent Voice Over Wireless Mesh

Distributed SIP Proxy and Back-up Registrar Functionality First On-Board Application

Last update: 7:59 a.m. EDT Oct. 20, 2008

SANTA CLARA, Calif., Oct 20, 2008 (BUSINESS WIRE) -- MeshDynamics' new Persistent Baseline Voice (PBV) technology software option allows each of the company's MD4000 Third Generation wireless mesh nodes to function as a back-up Voice-over-IP (VoIP) server for mobile and highly survivable applications. The PBV option incorporates a Session Initiation Protocol (SIP) Proxy Agent to efficiently route SIP user agent and call set-up requests from WiFi-connected handheld VoIP devices across the wireless network to any SIP Registrar.

As user agents (typically individual VoIP phones) register with the central server and call requests are received, each wireless mesh node is also automatically maintaining a list of voice devices, along with their location and address, in a Back-up SIP Registrar. The SIP information gleaned by each individual wireless mesh node is also shared with all other nodes in the network automatically to create a complete back-up SIP Registrar in every node. Voice traffic is automatically routed via the most efficient path through the network.

If the wireless mesh network becomes divided, connection to the central SIP registrar may be lost. Without PBV, this would mean that no new voice calls could be initiated in the isolated segments of the mesh network. In many environments, such as underground mining and mobile military applications, this is unacceptable. But Persistent Baseline Voice technology allows new calls to continue to be made within the isolated network segments transparently to the user, who simply dials the usual extension number. One of the wireless mesh nodes in the isolated segment takes over as the SIP Registrar, "spoofing" the original SIP Registrar whose connection has been lost. This allows connectivity between all phones in the isolated segment in the normal fashion. Because the Back-up SIP Registrars in every node in the network have the same information, user devices may roam between the isolated segments and still connect as normal. When the connection between the isolated segments is restored and the original SIP Registrar is again available, the PBV Back-up Registrars immediately go off-line and return to listening mode.

Persistent Voice technology is the first of many applications which will operate on the Wireless Mesh Nodes alongside the mesh networking software. Francis daCosta, Founder and CTO of MeshDynamics, indicated that the company expects to incorporate a variety of applications required by users, such as sensor integration. "Our basic architecture has been designed to permit rapid development of additional functionality. There are many user needs that are best served by distributing the application through the mesh network and it will become an increasingly important distinction for our products. As we move beyond basic data transport, many of these on-board applications will integrate, classify, and distill data and events from the remote points to add intelligence and value to what is shared across the network."

The Persistent Baseline Voice software option is available now and priced at $300 per MD4000 wireless mesh node. Existing customers may contact the company to inquire about upgrades.

MeshDynamics delivers one of the only third-generation wireless mesh networking solutions for high-performance outdoor data, voice, and video networking. Based on sophisticated dynamic channel-agile networking algorithms, MeshDynamics' MD4000 family of Structured Mesh(TM) wireless nodes deliver very low-latency and low-jitter performance, even over multi-hop topologies where many earlier generation wireless mesh networking products fail. MeshDynamics' products are in use worldwide in mining and industrial, homeland security/defense, transportation, and metro/municipal network applications. MeshDynamics, Inc. is privately held and headquartered in Santa Clara, CA. More information at: www.meshdynamics.com

SOURCE: MeshDynamics, Inc.

MeshDynamics, Inc. Byron Henderson, 408-398-6395 news@meshdynamics.com


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