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4.3 SwitchPoint

What is SwitchPoint Network's DSDN technology?

SwitchPoint Network's Digital Switched Data Network (DSDN) is a proven, commercially available third-generation (3G) broadband technology that enables the deployment of 100 Mega bits per second (Mbps) last-mile networks. DSDN leverages the advantages of proven indoor Ethernet Local Area Network (LAN) technology for use in large scale, outdoor residential and small business networks.

Superior in performance to second-generation last-mile technologies such as cable modem and DSL, and lower in cost than other 3G technology alternatives such as fiber-to-the-home (FTTH), DSDN combines standard fiber and Category 6 (Cat6) cable with SwitchPoint's switches, network protocols and software to provide affordable broadband Internet access with upload and download speeds of 100 Mbps.


by redxii See Profile
last modified: 2002-07-28 20:43:32

DSDN technology is based on proven switched Ethernet local-area networking concepts. Originating from a fiber optic network backbone, Cat6 twisted-pair cable is connected to environmentally hardened DSDN switches throughout a neighborhood. Cat6 wiring then connects the switches to a subscriber's home or business. By using standard Ethernet connections, the DSDN network does not require expensive interfaces, and can be built for far less than FTTH alternatives. To conserve bandwidth and eliminate congestion, the DSDN switches route data packets intelligently within the network. Even if a cable is cut, the intelligent path routing capabilities of the DSDN network allow it to move around the affected area to deliver reliable, continuous service. More importantly, traffic within the network maintains a speed of 100 Mbps and does not need to travel through a central office, head-end or public Internet.


by redxii See Profile
last modified: 2002-07-28 20:43:42

    Speed - DSDN is commercially deploying 100 Mbps, testing 1 Gbps and
    working on 10 Gbps. Most proposed fiber deployments currently provide only 10
    Mbps to the end user.
    Scalability - Both FTTH and DSDN can scale and have robust
    architectures that are full duplex and switched. Ethernet is an extremely robust
    system for data transfer, whether through FTTH or DSDN.
    Redundancy - DSDN intelligently re-routes network traffic around any
    accidental cable cuts or path disruptions resulting in uninterrupted service to
    the consumer. Most FTTH systems are home-run strands from either the NOC or a
    major hub to the home. It takes either intelligent components in the field
    (DSDN), or redundant home run fiber from a second location (very expensive) to
    achieve redundancy.
    Ease of Implementation and Maintenance - DSDN is easier to implement
    and maintain and does not require additional customer premise equipment. FTTH
    implementations are more difficult and require special handling for each fiber
    drop to the home and the installation and maintenance of active optical
    switching equipment at the customer's premise. Cable cuts on a DSDN network are
    easy and inexpensive to locate and repair. A cut to fiber requires expensive
    equipment to locate the cut and extensive labor and equipment to repair.

by redxii See Profile
last modified: 2002-07-28 20:43:56

DSDN provides symmetrical, full-duplex 100 megabits per second bandwidth. This is at least 2,000 times faster than a dial-up modem, 14 times faster than the maximum speed of most DSL lines and ten times faster than the maximum speed of a standard cable modem.


by redxii See Profile
last modified: 2002-07-28 20:44:15

    100 Mbps Speed - DSDN provides symmetrical, full-duplex
    broadband access of at least 100 Mbps. This is at least 2,000 times faster than
    a 56 Kbps dial-up modem, 14 times faster than the maximum speed of DSL, and ten
    times faster than today's maximum speed of a cable modem.
    Low Cost - Deployment costs for DSDN are comparable to less
    robust second-generation alternatives and significantly less expensive than
    comparable FTTH solutions. DSDN technology delivers the performance of FTTH
    without the high cost of installing fiber optic cable to the subscriber's
    premises. While FTTH deployments can cost in excess of $3,000 per home, DSDN can
    be deployed for under $1,000 per home passed.
    Proven - The SwitchPoint DSDN solution has been in commercial
    operation more than two years and has provided broadband services to thousands
    of customers. SwitchPoint deployed DSDN to more than 10,000 homes and 2,000+
    customers in two test markets in Utah and is now marketing DSDN to network
    builders and operators.
    Upgradeable - DSDN is engineered for upgrades to 1 Gbps with a
    simple DSDN switch replacement; no new cable or construction is required. DSDN
    can cost effectively scale to deliver multi-gigabit bandwidth performance that
    matches FTTH, at a fraction of the cost.
    Scalable - DSDN networks will scale to support any number of
    homes covering a market of any size and are compatible with Metropolitan Area
    Networks (MAN) for their backbone traffic.
    Flexible - The SwitchPoint DSDN solution is extremely flexible
    and can be deployed as a stand-alone 100 Mbps data network or as an overlay to
    new or existing HFC cable networks or power grids.
    Deterministic - Each user in the DSDN network is connected to
    an individual 100 Mbps port on the closest DSDN switch and do not share their
    ports with other users on the network. The fully switched nature of DSDN
    architecture maximizes available bandwidth and guarantees performance for users.
    Flat, non-switched architectures such as cable modem networks share bandwidth
    with all users on the network, causing effective throughput to diminish at peak
    Symmetrical - DSDN provides symmetrical, full-duplex
    bandwidth, which means that users simultaneously can send and receive up to 100
    Mbps of data. In contrast, upload speeds of cable modem and DSL are
    significantly lower than their maximum download speeds preventing effective
    deployment of premium services that require symmetrical bandwidth such as
    videoconferencing, VPN and interactive gaming.
    Standards-Based - DSDN is fully compatible with standard
    Ethernet and IP protocols; works with standard networking equipment and does not
    require specialized customer premise equipment, such as a modem.
    Reliable - Neighboring DSDN nodes can be connected to each
    other through redundant Cat6 links. Even if a cable is cut, DSDN's multi-path
    routing capabilities easily work around the affected area to deliver continuous
    Secure - The DSDN network is an all-switched network. Security
    is enhanced in an all-switched network because all users on the network do not
    receive all packets. In flat network architectures such as cable modem, fixed
    wireless and some FTTH broadband platforms, this level of security is not

by redxii See Profile
last modified: 2002-07-28 20:44:31