Ericsson is this week re-entering the market for DSLAMs with an innovative Ethernet access card that it says will unlock the mass market for DSL services by . DSLAM units are typically located in telephone exchanges or distribution points. They allow for the high-speed transmission of DSL technology. Ericsson’s EDA solution is the most widely deployed IP/Ethernet DSLAM with over 60 contracts globally, utilizing the latest ADSL2+ technology.

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There is switch hardware, power control hardware, and a linux machine, all inside a small rack-mounted box. Eticsson page was last edited on 25 Octoberat Therefore, it cannot re-route traffic between multiple IP networks, only between ISP devices and end-user connection points.

Digital subscriber line access multiplexer

By using this site, you agree to the Terms of Use and Privacy Policy. Typically a single DSLAM aggregation card has 24 ports, but this number can vary with each manufacturer. Some weeks are more complicated than others.

No Comments No comments yet. December Learn how and when to remove this template message. Our vendor has subsequently identified a bug that is consistent with our observed outcome, and on their advice, we upgraded to the next revision of the code concerned in which that specific bug had been fixed.


Retrieved from ” https: This modem functionality is integrated into the DSLAM itself instead of being done via an external device like a 20th-century voiceband modem. It also uses the best equipment and services it can obtain — because this is all a part of giving our customers the best possible service experience.

What is left, therefore just like the airline situationare the truly unusual failure modes.

Ericsson EDNX IP DSLAM Module | eBay

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This sort of resiliency is at the dspam of why these systems are generally just rock solid in practice. The DSLAM equipment collects the data from its many modem ports and aggregates their voice and data traffic into one complex composite “signal” via multiplexing.

Ericsson EDN312X IP DSLAM Module

Designing and Deploying Triple-Play Services. Views Read Edit View history. During reboot, the DSLAM modules maintain physical line sync to the customer, but obviously data flow stops. Each modem on the aggregation card communicates with a single subscriber’s DSL modem.

This has been a complicated week! An ECN looks like a 24 port ethernet ddslam switch. In other projects Wikimedia Commons. Customer-premises equipment that interfaces well with the DSLAM to which it is connected may take advantage of enhanced telephone voice and dslsm line signaling features and the bandwidth monitoring and compensation capabilities it supports.


Sorry, the comment form is closed at this time. Posted in Broadband by Simon Hackett. The only thing that has been demonstrated to stop the fault is to upgrade the ECN software to a newer release. This is due to the nominal line impedance measured in Ohms but comprising both resistance and inductance of balanced lines being somewhat lower than that of UTP, eficsson supporting ‘weaker’ signals however the solid-state electronics required to construct such digital interfaces are more costly.

Like modern airlines, all the routine causes of breakdowns have largely been engineered away. Nodes that have worked flawlessly for five months, so they might work flawlessly for another five months. Internode engineers a lot of redundancy and resiliency into its network services. Ok, so what happened? Last night we saw a few more switches not yet upgraded start to demonstrate the fault. In response we proactively upgraded another significant proportion of the switches in the entire SA network.

The anatomy of a complex fault. Unsourced material may be challenged and removed.

This is not a trivial decision, because we are upgrading to a new software release — which brings in the potential for there to be some other, as yet unknown, issue for our service.