Telecom's conklin/mini dslams - false advertising?

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exportgoldman

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#52563 16-Nov-2006 01:25

richms: The conklin dslams are located away from the exchange with the 2 meg circuit back to the exchange. It is clear that the conklins are not in the exchange building. There may be some weird cases of old small exchanges in small towns that dont warrent a real dslam in them, but a majority are stuck in subdivisions and small clusters of people in the middle of nowhere. They are not in any building designated as an exchange, and in a lot of cases there is nothing else there other then a whole lot of wires joined together. I thought this was made clear in my previous posts about this and don't appreciate a facetious reply relating to hinges.

Back when I had dialtone from a 0+2, the performance was impaired by the equipment installed to provide the service to me. The conklin dslam is exactly the same, its to extend services to those that would otherwise be unable to get it. It has limitations and those limitations are present between the user and the building that is commonly known as the "exchange"

The funny thing is these are actually 'temporary' devices, and as part of Telecom's Next Generation Network rollout, they will all be replaced (can't find the document right now)

They also are replacing them as they get more users on, they are basically a el-cheapo unit for dairy farmers and cheap low density subdivisions out of reach of ADSL.

I can only guess they must be very cheap for Telecom to install and then plan to replace them.

I know they can do up to 8 Megabits, but I assume since Telecom only configure with 2 Megabits, they use other channels for voice and OneOffice...

Their newer cabinet configs will allow them to plug the copper pair in, and provision all services remotely without rejumpering, eg DSL, Phone, VoIP Service.

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

richms

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#52583 16-Nov-2006 10:05

Well really the whole adsl network as we know it is tempoary if you go by that rationale, since it will be replaced with something faster one day when HD on demand becomes a requirement for any network. While anything they come up with will most likly use the exisint pair back to a cabinet, it sure as hell wont be the adsl service that we know today.

Richard rich.ms

exportgoldman

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#52647 16-Nov-2006 13:58

bradstewart:
Grant17:So then..."the maximum possible connection speed between your modem and your local phone exchange" could NEVER be 7.6Mbps then could it, because part of that link runs at only 2Mbps .

Therefore, how can "the xtra blurbstill be correct"?

QED I think.

Because as you know xtra never promised 7.6Mbps... Have you got that yet? They promised the maximum your line can deliver. Which with a conklin is 2Mbps... So the blurb is true. Those people are getting their maximum.

QED!

From Telecom http://www.telecom-media.co.nz/releases_detail.asp?id=3358&page=2&pagesize=10

"All plans will feature maximum downstream speeds giving customers speeds as fast as their line will allow."

My line connects at 7 Megabits. That is *MY* connection, the *SHARED* backbone from the conklin is 2 Megabits.

Blurb = False

If it said

"All plans will feature maximum downstream speeds giving customers speeds as fast as their subdivisions lines will allow."

or

"All plans will feature maximum downstream speeds giving customers speeds as fast as their lines and shared backhaul will allow."

or

"All plans will feature maximum downstream speeds giving customers speeds with no artifical constraints on their line limits"

Note: Theres a reason I'm not in marketing...

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

exportgoldman

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#52652 16-Nov-2006 14:23

richms: Well really the whole adsl network as we know it is tempoary if you go by that rationale, since it will be replaced with something faster one day when HD on demand becomes a requirement for any network. While anything they come up with will most likly use the exisint pair back to a cabinet, it sure as hell wont be the adsl service that we know today.

I wish I could find the quote, but Telecom have stated as part of their NGN rollout, and as loading increases in the Conkin mini-DSLAMS they will be replaced with bigger ones.

They are a stop gap measure.

The other gear Telecom are rolling out now, has a place in the NGN and won't be replaced - including the copper to homes, and FTTN

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

Wendy

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#52689 16-Nov-2006 18:24

Bung: I have seen someone from Xnet posting that they have arranged for some customers to be rate limited again to stop frequent disconnections. In some cases it is possible to be put back on the leash.

That involved moving people from FS connections back to a 2Mb or a 256k plan as that put a copper rate limit back on the line, without it some customers were suffering very frequent dropouts which meant we either have to work out what types of routers handle the connection better (the good old Nokia M1122 did a great job on the worst customer I've seen so far, two other routers he tried he was getting disconnections every 15 minutes or thereabouts, since putting the Nokia in, rock solid) or downgrade them to a plan with a copper rate limit on it which as the 256k and 2Mb plans are still available is an easy solution.

Bung

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#52693 16-Nov-2006 19:08

exportgoldman:
I wish I could find the quote, but Telecom have stated as part of their NGN rollout, and as loading increases in the Conkin mini-DSLAMS they will be replaced with bigger ones.They are a stop gap measure.
The other gear Telecom are rolling out now, has a place in the NGN and won't be replaced - including the copper to homes, and FTTN

That's assuming that the cabinet is fed from Fibre. AFAIK Conklins can also be fed from a 2M link over copper. There have been other reports (Juha I think) that GB Ethernet fed DSL will wait for the ADSL2+ rollout. In that sense all existing stuff is "stop gap". Even the old stop gap Nokia gear was itself upgraded very frequently as new line cards were developed.

cyril7

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#52778 17-Nov-2006 08:25

The Conklins can be fed with 1 to 4 E1s, which can be delivered via fibre or HDLC(copper). Each Conklin can support 4 DSL lines, and can be cascaded to expansion modules to provide upto 60 DSL lines. Therefore depending on how much room is in a cabinet you can have 4 to 60 DSL lines feed from a 2-8Mb/s uplink.

Cyril

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exportgoldman

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#52813 17-Nov-2006 13:09

cyril7: The Conklins can be fed with 1 to 4 E1s, which can be delivered via fibre or HDLC(copper). Each Conklin can support 4 DSL lines, and can be cascaded to expansion modules to provide upto 60 DSL lines. Therefore depending on how much room is in a cabinet you can have 4 to 60 DSL lines feed from a 2-8Mb/s uplink.

Cyril

From what I read also, the technical specs on the Conklins is max 4xE1 trunks (4x2Megabits Copper backhaul) on these devices.

But, from everything I read from Telecom (Wholesale agrements, TelstraClear's submission to the Commerce commission etc) Telecom only spec it with a 2 Megabits connection.

I'm assuming they leave 1 E1 for OneOffice services, but perhaps you could tell me if some of the E1's have to be reserved for POTS voice trunking back to the exchange?

ie, is this a ISAM?

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

cyril7

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#52819 17-Nov-2006 13:44

As the Conklins are upgrades to existing POTS services then I guess there are already several E1's to each cabinet to drive the pots services. I also guess that Telecom Engineering have decided to only drive each Conklin with one E1, maybe if they expand from the minimum 4dsl lines to more (max 60) they may aggregate more E1s if available, dunno maybe someone from Telecom can tell you the policy.

The E1 interface on the Conklins is af-phy-0064.000, which is essentially dsl atm traffic on E1 via the phsical connection of G703.

I presume most E1s (for POTS or ADSL) are delivered by HDSL, so there will be a HDSL<>G703 interface required, if fibre was used then a fibre<>G703 interface would be needed instead. Again maybe someone from Telecom who installs these things can tell us the typical setup.

The ISAM as in the ALCATEL FTTN product that Telecom intend to roll out as part of their NGN is a totally different product all together. It uses GigE fibre delivery (same single mode fibres differnt protocols on the traffic), massively greater capacity and througput. In fact not on the same planet.

Cyril

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