| Narad Broadband Access Network »www.naradnetworks.com/hardware.html#biu
»www.naradnetworks.com/pdf/BIU.pdf
»www.naradnetworks.com/pr_062805.html
You will ndeed a new Broadband Interface Unit. You cable modem will not work with this new system.
The Narad Broadband Access Network (NBAN) is a switched Ethernet overlay that touches the cable plant with only passive filters. NBAN provides an additional 100 Mbps upstream plus 100 Mbps downstream on each of the four coaxial cable trunks in a hybrid fiber-coax (HFC) fiber node. This allows cable operators to deliver new broadband IP services while preserving existing network infrastructure and services. The Narad solution coexists with all existing network elements without requiring replacement of any existing network equipment.
NBAN is a network infrastructure solution that brings the capacity advantages of a fiber optic infrastructure to the coaxial portion of the HFC network - at a much lower cost than pure fiber solutions.
By utilizing our technology, operators can augment the ROI of their existing HFC plant by extending the network to support new IP services.
Utilizes frequency range that is unused in today's existing HFC architectures
100 Mbps per coaxial cable trunk (typically 4 per node) of switched symmetrical Ethernet with QoS
100 Mbps technology coexists with existing taps
NBAN leverages the spectrum between 908 MHz and 1.08 GHz to deploy switched 100 Mbps Ethernet over existing physical coaxial connections and cost-effectively utilizes the higher-frequency spectrum by creating shorter runs and regenerating signals at shorter intervals. This previously unused spectrum is made productive by dividing the tree-and-branch coaxial network into a number of point-to-point coaxial segments linked by switching elements. Additional bandwidth beyond 860 MHz can therefore be effectively used for transmitting and receiving high data rate signals while maintaining acceptable signal characteristics. Since the "switch&repeat" architecture regenerates the IP traffic at each switch, ingress noise is not propagated. The result is a very high performance network.
NBAN Elements
The Narad Broadband Access Network (NBAN) allows cable operators to cost-effectively deploy incremental services on their existing HFC networks using standard switched Ethernet.
NBAN is comprised of four hardware elements, of which only the passive filters reside on the HFC network:
Optical Network Distribution Switch (ONDS)
Narad Access Switch (NAS)
Narad Diplex Filter (NDF)
Broadband Interface Unit (BIU) with Customer Premise Filter (CPF)
The ONDS is co-located with the existing HFC node, and is fed by two separate wavelengths from the existing fiber optic cables. No new fiber is installed. Narad Access Switches are collocated with existing active amplifiers that lie between the node and a customer that is being served. The NAS is also used in the form of a "drop" to switch traffic to a customer. The BIU, Narad's customer premise modem, sits inside the customer premise along with a customer premise filter that separates the Narad frequency from the standard cable service frequency. |
