
Continuous Computing claims to be one of the market leaders in producing the DPI systems. You can read this article by Mike Coward who is the CTO and Co-founder of Continuous computing here.

Latest News and Information on 4G, 5G, 6G, and other Wired & Wireless Technologies in General.
A good introduction is an article in Lightwave titled, "Carrier Ethernet transport: No longer 'if,' but 'how'". There are some very good diagrams explaining the concept and its difficult to reproduce them here.Carriers around the world are increasingly being pressured to provide new services while reducing their costs to remain competitive with changing regulations and new, non-traditional entrants into the marketplace. As carriers migrate to next-generation networks (NGNs) to reduce their costs and improve their ability to support high bandwidth-intensive services with guaranteed SLAs, they need a flexible, scalable optical transport
infrastructure – especially in the metro network – that efficiently supports
Ethernet and minimizes operational complexities.
Carrier Ethernet Transport (CET) is an architectural approach to building scalable transport infrastructure for supporting Ethernet and the evolution to NGNs* Carrier Ethernet Transport integrates intelligent WDM (ability to do multi-degree switching at wavelength and sub wavelength levels) with
Ethernet Tunnels, such as PBB-TE and T-MPLS .
* Carrier Ethernet Transport (CET) provides the simplicity and cost-effectiveness of native Ethernet with the reliability and power of WDM to deliver unparalleled flexibility, efficiency and cost savings
* Note that “Carrier Ethernet” comprises two distinct sub-segments: “Carrier Ethernet Services” and “Carrier Ethernet Transport”
Carrier Ethernet Transport is an architecture for NGNs based on wavelength networking. Services from both wireless and wireline access networks are simultaneously carried on a single network infrastructure. Three levels of embedded transport networking switching capabilities (wavelength, sub-wavelength, and Ethernet tunnels) provide a cost-effective transport network that can support services with guaranteed service level agreements (SLAs).
Telecommunications: You mentioned CET. Although it’s still an early concept, how are service providers responding to the idea at this time?
Bar-on: The perspective is very positive. CET is optimized transport Layer-2 carrier packet traffic. Traffic is growing tremendously. Sometimes you hear a number of 100 percent per-year growth in some carriers, but the average number would be about 70 percent. Everyone realizes the infrastructure needs to be packet-optimized. The way we present CET is it’s a combination of Ethernet and WDM. This has been positively received when looked at by carriers. You can have an argument as to what protocols to use, but CET is the next transport layer. Many carriers are looking for a migration from the current TDM- based infrastructure to a packet
optical-based infrastructure.Telecommunications: Outside of traditional enterprise services, there’s a lot of talk about using Ethernet for wireless backhaul. Albeit it’s still early, are your carrier customers investigating Ethernet for that application?
Bar-on: We do see a strong requirement from carriers doing wireless backhaul over Ethernet. It’s driven by two elements happening in the market:
1. Base Station Migration: The base stations themselves are migrating from TDM/ATM to 4G or Ethernet. We have the luxury in that we manufacture both the base station and the transmission equipment. We have a dedicated solution because we understand both ends of the market. It’s quite clear that Ethernet will play a role in 4G deployments.
2. Pseudowires: On the other side, carriers are looking to reuse their opex to carry 2G and 3G over Ethernet with Pseudowire rather than SONET/SDH networks. We see it mainly coming from competitive carriers that are trying to fight on the backhaul business to fight with traditional ILECs and PTTs. Having said that we at Nokia Siemens are providing a solution that addresses the current scenario where you have 2G, 3G, and a migration for 4G. What you see in both cases is this metro Ethernet network not only has to address not only Ethernet traffic, but also highly sensitive voice traffic over TDM. For that we believe that concepts like connection-oriented Ethernet can provide five-9s reliability for this kind of service. It’s no longer just about Ethernet access.Telecommunications: Earlier you mentioned Carrier Ethernet Transport (CET). One of the emerging debates to come out of the CET concept is the use of Provider Backbone Transport (PBT)/Provider Backbone Bridging-Transport Engineering (PBB-TE). How are these concepts resonating with the service provider community?
Bar-on: We’re seeing that everyone is interested in that and want to see if it’s real. Major carriers in the U.S. are very interested in the technology and are in a position to see that it’s real and it’s working. If you look at the cycle of technology, we are probably in the early beginning of the deployment of this technology at least in the U.S. market. We see other groups in Europe going quicker and are leading the camp here, but no one can really ignore this thing. Even if I look at the RFPs by major U.S. carrier out in the market some of them are including requirements for PBT/PBB-TE. If you think about this now and where we were a year ago that’s a major step.