Optical/IP Networks

Alcatel Unveils 'Better' DSLAM

Alcatel SA (NYSE: ALA; Paris: CGEP:PA) today announced a new addition to its family of DSLAMs. Called the 7301 Advanced Services Access Manager (ASAM), it's likely to be welcomed with open arms (and sighs of relief) by quite a few carriers.

Why? Because they're hoping the 7301 will help them unlock more revenues from existing Alcatel broadband infrastructure, which is already widely deployed.

"Up until now, Alcatel's DSLAMs have had a reputation for holding back the deployment of advanced services," says Graham Beniston, principal of Beniston Broadband Consulting and author of a report on the B-RAS (broadband remote access server) market in the current issue of Light Reading Insider, Light Reading's subscription research service.

By addressing this issue, the 7301 could give carriers the confidence to roll out higher-margin, DSL-based services to small and medium-sized enterprises and to move ahead with offering video-based services to residential customers.

Right now, a lot of service providers are holding back on this front, according to Beniston. "Carriers like BT are frightened to use more than one ATM PVC [permanent virtual circuit] per customer or move to SVCs [switched virtual circuits] because of poor support for these features in existing DSLAMs and ATM switches," he says.

"Even worse, carriers are frightened by the element and network management aspects of a million ATM PVCs. This holds things back, because the best way of providing advanced services over DSL links, is to use multiple ATM PVCs or SVCs per customer link."

Alcatel is by no means the first DSLAM vendor to announce a product addressing some of these concerns, but announcements are one thing and deployments are another in this market, according to Beniston. "Alcatel is late to announce, but it might still be first to deploy."

One reason for this is that a lot of carriers already have Alcatel DSLAMs and are probably reluctant to bring in another supplier because of the complications and cost of operating and maintaining two sets of equipment.

Alcatel has by far the largest share of the DSLAM market. At the end of 2002, it had shipped equipment equivalent to 23.5 million DSL lines, more than four times as much as its closest competitor, Lucent Technologies Inc. (NYSE: LU), which had shipped about five million lines, according to Dell'Oro Group. So, what will service providers get with the Alcatel 7301 ASAM that they aren't getting with the 7300, its flagship DSLAM? "It's a case of bigger, better," says Phil Tilley, VP of marketing for Alcatel's fixed network division.

Here are the key points:

  • Quadruple the Capacity: Alcatel's press release says the 7301 is the "industry's highest capacity broadband access platform" although this isn't based on the number of DSL lines per 7-foot telco rack, the normal way of measuring such things (see Alcatel Launches Big DSLAM).

    Tilley says citing density is over-simplistic, because bandwidth per user is also important, and because the 7301 will often be used to aggregate traffic from smaller DSLAMs.

    "In terms of subscribers (10,000 business and residential subscribers), connections (40,000), network management (2,000,000 subscribers and 4,000 nodes), backplane (170 Gbit/s), network processor (5 Gbit/s) and slot capacity (1.4 Gbit/s/slot), our DSLAM is the highest capacity DSLAM on the market," he writes in an email.

  • Business Services: The 7301 makes it easy for carriers to shape traffic in ATM virtual paths so that they can offer performance guarantees on more expensive services targeting business users.

  • Multimedia Services: The 7301 incorporates a dedicated broadcast video bus that enables carriers to offer up to 250 video channels to residential users. Handling video on a separate bus also frees up the 7301's data backplane, enabling it to handle a greater number of other users and applications. The 7301 also supports "advanced IGMP (Internet Group Management Protocol) multicasting," according to Alcatel, a feature that economizes on bandwidth by avoiding duplication of video traffic.

  • Easy Upgrades: Existing 7300s can be upgraded to 7301s in the field by simply swapping in a new card on each shelf.

  • Lower Overall Costs: Use of the 7301 will lead to infrastructure cost savings, according to Alcatel. In a typical setup, the 7301 will sit between smaller DSLAMs and the B-RAS. The 7301 grooms the connections coming from smaller DSLAMs so they occupy less bandwidth. It also aggregates upstream traffic so that it can be carried in fewer, bigger pipes to the B-RAS.

What still appears to be missing in the 7301 is support for ATM switch virtual circuits, which will disappoint some carriers.

Alcatel expects to start volume shipments of the 7301 this summer, although some features won't be available until the third or fourth quarter of 2003, according to Jo Bervoets, VP of product marketing for the access business group of Alcatel's fixed networking division.

A late-arriving feature is likely to be a Gigabit Ethernet uplink -- something that Beniston doubts will be required by carriers in any case.

"What carriers ask for in RFPs and what they actually buy are two different things in the DSLAM market," says Beniston. He maintains that carriers nearly always end up skipping the bells and whistles and buying basic boxes at the lowest possible price.

Beniston goes on to say that Alcatel has achieved its market dominance by having the most aggressive DSLAM prices. He expects Alcatel to continue this policy with the 7301. Recent message board comments suggest this could be between $50 and $75 a port after discounts (see Price per Port).

It's worth noting that Alcatel is planning to announce a new version of its IP Services Module (ISM), which will add B-RAS functions to the 7301. The new version, ISM2, will be announced "later" according to Bervoets.

Previous research by Light Reading suggests that the ISM2 is being developed with the help of Corona Networks Inc., which is in turn tapping the expertise of India's Wipro Ltd. (see Corona Gets a Boost).

— Peter Heywood, Founding Editor, Light Reading

Road Trip 12/5/2012 | 12:02:51 AM
re: Alcatel Unveils 'Better' DSLAM Whatever they do, Alcatel will never be able to design out the fact that they are French.
SolarSailor 12/5/2012 | 12:02:49 AM
re: Alcatel Unveils 'Better' DSLAM >Whatever they do, Alcatel will never be able
>to design out the fact that they are French.

Too True! How fortunate for them.
firstmile 12/5/2012 | 12:02:45 AM
re: Alcatel Unveils 'Better' DSLAM Ahhhh! to be French........

Cheese chompin surrender monkeys!!!

No offense Larry.

beltway_light 12/5/2012 | 12:02:37 AM
re: Alcatel Unveils 'Better' DSLAM I am not sure how much sense is to make DSLAM
smart. If the DSLAM becomes router(BAS), think
about the router maintenance, troubleshooting,
routing protocol craps, graceful restart, etc.
Besides, within a routing domain, does it make
sense to have thousands of routers around? would
it create routing scalability problem?
Peter Heywood 12/5/2012 | 12:02:30 AM
re: Alcatel Unveils 'Better' DSLAM This is a great topic. We'll follow up with column on it before too long.
firstmile 12/5/2012 | 12:02:26 AM
re: Alcatel Unveils 'Better' DSLAM It is a great question. My take is that ALA is adding a small "stage" of BRAS functionality. The goal is still definitely to keep it simple at the edge. But when you have as many residential subscribers at each DSLAM as ALA has (maybe 2500 per uplink), it really pays to do a little bit of aggregation at the source.
However, I DO NOT think that the carrier will be able to get rid of the "RedBack".
fmenard123 12/5/2012 | 12:00:16 AM
re: Alcatel Unveils 'Better' DSLAM For those curious about what regulated carriers do with DSL, see:

router_guy 12/4/2012 | 11:41:22 PM
re: Alcatel Unveils 'Better' DSLAM This is just my opinion. But I feel that Alcatel does not have a DSL aggregation solution. Even if they introduce one, it will take a while to debug. Carriers are done being Beta sites in the DSL market space.

What Alcatel does have is presence. They are the number one DSLAM installed. They also have a large carrier installed base of the old Newbridge ATM switches. So it makes sense that they would use their advantage. Introduce intelligence into the DSLAM or the ATM switch. It requires no additional rack space. Try to get a box into a data center these days. If they had a decent aggregation router they would probably leave the DSLAM as it is and just focus on increasing the range of DSL.
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