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The FSA approach to IP routing represents the first significant quality improvement and cost reduction in IP since its inception. The FSA router is an IP router that could be intermixed with any other existing traditional IP routers in the network, but has a number of significant technological advantages over today’s packet routers. The FSA router keeps flow state information about all packets in each individual flow, which requires a lot of memory look-ups and has become possible only recently with rapid decrease of memory cost. The FSA router can determine duration, rate and byte count per flow, thereby controlling the delay and rate per flow.

FSA technology provides network managers with the capability of converging different networks into one IP end-to-end QoS enabled network and cost effectively replaces existing ATM and TDM networks. Anagran routers achieve end-to-end QoS by introducing new IP signaling through the TIA and ITU-T committees. QoS signaling supports guaranteed rate, Call Acceptance Control (CAC) and precedence. The TCP rate feedback greatly improves Web access speed, making web page retrieval at least ten times faster than what it is today.

More about Anagran’s Technology can be read in our white paper “FSA Technology

More information on the QoS signaling concept is available from the article by John Adams (British Telecom), Avril IJsselmuiden (University of Duisberg-Essen) and Lawrence Roberts (Anagran) “Advanced QoS Protocol for Real-Time Content over the Internet’, published in “Lecture Notes in Computer Science”, Springer journal.

If your institution has access to this journal, you may view the paper for free or the paper could be purchased from the following website: (you may need to copy and paste the URL into your browser).