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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December Learn how and when to remove this template message. Customer-premises equipment that interfaces well with the DSLAM to which it is connected may take advantage of enhanced telephone voice and data line signaling features and the bandwidth monitoring and compensation capabilities it ericssson.

The only thing that has been demonstrated to stop the fault is to upgrade the ECN software to a newer release.

Digital subscriber line access multiplexer

So far, updating an ECN to that newer software release has resolved the issue on all customers ericcsson to that affected ECN. DSLAMs are also used by hotels, lodges, residential neighborhoods, and other businesses operating their own private telephone exchange.

Unsourced material may be challenged and removed. Therefore, it cannot re-route traffic between multiple IP rslam, only between ISP devices and end-user connection points.

Ethernet DSL Access unlocks the broadband mass market

Please help improve this article by adding citations to reliable sources. 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.

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. 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.


This modem functionality is integrated into the DSLAM itself instead of being done via an external device like a 20th-century voiceband modem. Each DSLAM has multiple aggregation cards, and each such card can have multiple ports to which the customers’ lines are connected. Retrieved from ” https: Thursday, April 1st, by Simon Hackett.

Ericsson EDNX IP DSLAM Module | eBay

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 months until this fault developed. Balanced pair cable has higher attenuation at higher frequencies. Archived from the original on This article needs additional citations for verification. But it is much more than that. 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.

Some weeks are more complicated than others. Its been extremely fast and reliable. RSS feed for comments on this post. Once they caught a cold, they kept eircsson. Posted in Broadband by Simon Hackett.

The current theory, based on vendor feedback, is that the software fault is a latent, load triggered, memory leak that makes the ECN lose the plot in a manner that corrupts some critical item inside one of the ECN systems — an item that remains corrupted after it is rebooted or power cycled. There is switch hardware, power control hardware, and a linux machine, all inside a small rack-mounted box.

Like modern airlines, all the routine causes of breakdowns have largely been engineered away.


InterComms – The International Communications Project

In response we proactively upgraded another significant proportion of the switches in the entire SA network. Each modem on the aggregation card communicates with a single subscriber’s DSL modem. 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.

Designing and Deploying Triple-Play Services.

The intention of writing this down is transparency eficsson something we love. This has been a complicated week! This page was last edited on 25 Octoberat As I write this, the network is back to operating in a normal and stable manner.

During reboot, the DSLAM modules maintain physical line sync to the customer, but obviously data flow stops. Accordingly, through this ring architecture, if there is a loss of any single: 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.

Views Read Edit View history. Last night we saw a few more switches not yet upgraded start to demonstrate the fault. The failure mode resulted in some downstream 12 port DSLAM modules spontaneously rebooting, and after boot, those modules started complaining of being handed invalid configuration data and commenced another reboot and… so on.

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.

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