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The Rationale for RFoG
by Shane Eleniak
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DT Reports Increased Profit, Fixed Line Losses, Mobile Gains, More Competition
Deutsche Telekom reported net revenue of EUR 15.0 billion for Q1 2008, representing a year-on-year decrease of 3.1 percent, impacted by the decline in revenue in the Broadband/Fixed Network and Business Customers segments due to conventional line losses, ...<< Subscribe to our Daily Digest email report for full story >>
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The Rationale for RFoG
by Shane Eleniak
The HFC-DOCSIS network continues to serve as the access mechanism. However, network operators are beginning to look for the next generation of access technology as service demands stretch the limits of HFC/DOCSIS systems. Most agree that an optical network is key to their strategy, but getting from HFC to an optical infrastructure is the challenge. One option is RF over Glass (RFoG).
The SMB VoIP Market Accelerates: Hosted vs. Premise
by Marek Kotelba
Worldwide SMB IP telephony spending will exceed $4.5 billion during 2008, according to some estimates, suggesting a 2003-2008 compound annual growth rate of 41.3%. What's driving the growth? Here's a look at some fundamentals of both hosted and premise-based SMB VoIP solutions.
Prime Time for MPLS
by Stephen Liu
In the beginning, MPLS was driven by the need to scale the public Internet and large corporate intranets. Remember "Tag Switching"? The migration to converged service networks is real and accelerating. Service Providers have selected MPLS to power the any-play services of voice, video, data, and mobility.
Applying Service Assurance and Negative Testing to Prevent Costly Downtime
by Thomas Maufer
In order to deliver a service that is highly available and reliable, organizations need to evaluate IP-based solutions across the widest possible range of adverse conditions, such as occur when receiving unexpected input from a new implementation of a complex protocol or when under active attack. Product vendors and their customers need to ensure that any product within the IP ecosystem can handle a "perfect storm" of unexpected traffic using test cases comprised of invalid inputs more severe than anything likely to be encountered in real world deployments. New approaches to "negative testing" are being developed to ensure products withstand such adverse conditions.
WiMAX: New Kid on the Block... And a Step to 4G
by Karim El Naggar
The newest WiMAX standard, 802.16e-2005 (Rev-e), not only supports mobility, it has as its heart OFDMA technology -- an air interface which has already been adopted as the basis of all next-generation, or 4G, wireless technologies. But it goes farther than just the air interface. 4G is expected to consist of OFDM-based radio networks -- boosted by advanced antenna technologies such as multiple input-multiple output (MIMO) and beam forming -- with flat-IP architectures that are packet switched, delivering an order of magnitude boost to end-user bitrates. Here's the pitch.
A New Class of All-IP Routers; At Your Service
by Doug Wills
For video and mobile broadband upgrades, major carriers and service providers are deploying multi-service edge routers (MSERs). MSERs can best be thought of as a service control point that combines subscriber management, edge routing, and Ethernet aggregation over either ATM or Ethernet networks. Additional features such as network security, P2P traffic management, and session border controls for VoIP services, can be added as the MSER and the market demands for them.
Boosting Link Reliability for Telco Triple Play
by Dr. Manouchehr Rafie and Kenneth Madison
Crosstalk is perhaps one of the major factors impairing performance of VDSL2 networks in always-on, triple play deployments. Severe crosstalk noise resulting from the on/off switching of DSL lines can cause link drops or acute performance degradation, which results in service disruptions. To alleviate this problem, service providers need an intelligent and automated technology that will allow them to ensure link integrity and dynamically adapt to optimum data rates in the presence of sudden, and large noise changes without interruption of the service.Industry Events
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Craig O. McCaw, Clearwire Chairman 07-May-08
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