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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As I write this, the network dslm back to operating in a normal and stable manner. A digital subscriber line access multiplexer DSLAMoften pronounced DEE-slam is a network device, often located in telephone exchangesthat connects multiple customer digital subscriber line DSL interfaces to a high-speed digital communications channel using multiplexing techniques.

This has been a complicated week! An ECN looks like a 24 port ethernet network switch.

Archived from the original on The only thing that has been demonstrated to stop the fault is erjcsson upgrade the ECN software to a newer release. What is left, therefore just like the airline situationare the truly unusual failure modes. 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, ericsosn for our service.

Digital subscriber line access multiplexer

It is important to appreciate that the current software release the faulty one was rolled out very carefully as all upgrades normally areand it has been flawlessly for around five eriscson until this fault developed. 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, thus supporting ‘weaker’ signals however the solid-state electronics required to construct such digital interfaces are more costly.


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.

In response we proactively upgraded another significant proportion of the switches in the entire SA dalam. Internode The Web Search Search.

In other projects Wikimedia Commons. Customer-premises equipment that interfaces well with the DSLAM ddslam which it is connected may take advantage of enhanced telephone voice and data line signaling features and the bandwidth monitoring and compensation capabilities it supports.

Like modern airlines, all the routine causes of breakdowns have largely been engineered away. Once they caught a cold, they kept it. A DSLAM may or may not be located ercsson the telephone exchange, and may also serve multiple data and voice customers within a neighborhood serving area interfacesometimes in conjunction with a digital loop carrier. Based on vendor advice, we are now looking at how best to upgrade the rest of the network, to guard against a further recurrence elsewhere.

Views Read Edit View history. So far, updating an ECN to that newer dxlam release has resolved the issue on all customers attached to that affected ECN.


The intention of writing this down is transparency — something we love.

Ericsson EDNX IP DSLAM Module | eBay

Multiplexing Digital subscriber line. Each modem on the aggregation card communicates with a single subscriber’s DSL modem. At that exit, those fibre links are attached to inter-exchange fibre paths, and overall what we construct in most cases is a wide-area ring. The following is a rough guide to the relation between wire distance based on 0. December Learn how and dzlam to remove this template message.

Thursday, April 1st, by Simon Hackett. By using this site, you agree to the Terms of Use and Privacy Policy.

The anatomy of a complex fault. Internode engineers a lot of redundancy and resiliency into its network services. This article needs additional citations for verification.

There is switch hardware, power control hardware, and a linux machine, all inside a small rack-mounted box. Nodes that have worked flawlessly for five months, so they might work flawlessly for another five months.

They are boot servers, control nodes, statistical aggregation points, and a number of other things including, also, being the ethernet switches that they appear, at face value, to be. This page was last edited on 25 Octoberat