FTTC Tech Question

f0zzy

Upgraded to FTTC - Eir had cap pf 7Mb set - still latency and sustainable download speed 6.x Mb much improved. Getting 10ms, ~7Mb

Attenuation 25.3 down, No CRC and SNR ~ 15-20db down

Asked eir to up my profile so they have now set it to 12Mb. Attached confirms this.

So to my problem/question

Repeated speed tests never go above 6.8 Mb - its as if 7Mb profile is still set.
I've checked several times across the day.

Is there some other setting that could be limiting the download speeds ?

As always thanks for all help/advice !

F0z

johnplayerblue

Those speed tests aren't fantastic for determining actual throughput. Although you should still be seeing higher than what you are.

Install a torrent client and head on over to the CentOS website for example and select the HEAnet network and download an image. This should give you a truer transfer rate.


That line looks like it might handle another meg or two by the way. Should remain stable although you'd be on the cusp of what it can handle. But if you're happy with what you have then I wouldn't bother.

Did they send you out a new modem. Where'd you get the attached image from ? I'm assuming you have the correct modem.

mass_debater

Are these wired speedtests?

ItHurtsWhenIP

The attenuation puts you at over 1,800m from a cab, which Open eir will only give you a 7Mbps profile.

f0zzy

I used http://www.speedtest.net/ for the actual tests and ran it several times over several hours to try and get a read on it. Whats interesting is everytime it gets to between 6.5 and 6.8 - I definitely think there is more in the line and its being limited in someway.

They did send out a modem Huawei 2000 but I decided to use own Asus AC68U which supports both DSL and ADSL as it has some better features. I've checked the settings and as far as I can tell they look optimal.

The profile Eir have set is 12 Mb - Is there a difference between what Eir will allow and what Open Eir permit ?

Tx for all replies btw

TheChizler

f0zzy wrote: »

They did send out a modem Huawei 2000 but I decided to use own Asus AC68U which supports both DSL and ADSL as it has some better features. I've checked the settings and as far as I can tell they look optimal.

Does it support VDSL? Cause that's what you should be using. Try it with Eir's gateway first.

f0zzy

Will try that. Yes it supports VDSL - I actually disabled the ADSL settings and am just using the VDSL settings to be sure to be sure.

Will try their modem and report back.

TheChizler

I'm not even sure would their network fall back to ADSL if the modem doesn't support VDSL, so it was a bit of a silly question now that I think about it! But eir will probably just ask you to plug in their own modem anyway if you go any deeper with their support.

f0zzy

Tried it with Eir's modem - and no difference - still seems to cap out under the 7. Even Eir said I should be able to get more than that based on line stats.

Stumped

Packet

There is a cap in two places. 1) on the actual VDSL2 line, 2) at the IP edge in eir's BNG.
The first one is the important one in the sense that the physical properties of the line determine the max speed attainable. The second one is there to help manage overall subscriber traffic to the DSLAM (or OLT).

It sounds like the speed increase so far has only been applied on the VDSL line profile.

Have you tried disconnecting your line for an hour to try to make it start using the new speed profile at the BNG. If that doesn't work get back on to them.

f0zzy

I might try that Packet - thx - and it helps explain things - also jives with what Eir said when I phoned them an hour ago.

Basically profile was set on their end but Fibre is still not fully activated on DSLAM (whatever that means) - so sounds like order
is still in the progress and not fully complete. Expect it to be complete next week so hoping to see speed increase then.

I'll post back to confirm - will also try disconnecting as you say and see what happens.

Tx again to everyone who replied - much appreciated

ED E

Packets correct its a glitch thats not unheard of. The line rate is correct but the IP limiter is still set to the last profile.

Turn your router off for a few minutes, call eir, have them issue an "NGA Reset", wait a few minutes to ensure the OSS have finished it, power on. You should see the correct throughput now.

ItHurtsWhenIP

MMFITWGDV wrote: »

The attenuation puts you at over 1,800m from a cab, which Open eir will only give you a 7Mbps profile.

ED E wrote: »

Packets correct its a glitch thats not unheard of. The line rate is correct but the IP limiter is still set to the last profile.

Turn your router off for a few minutes, call eir, have them issue an "NGA Reset", wait a few minutes to ensure the OSS have finished it, power on. You should see the correct throughput now.

@ED_E - If the attenuation puts it over 1,800m, then that slots into the 7Mbps profile according to Open eir:


Technically the laws of physics might allow a higher profile (hence the attainables on the modem), but the law of Open eir is a bit more conservative - n'est-ce pas?

dazdrog

take open eirs numbers with a pinch of salt, im around 1000+ meters from cab and get the following

guil

dazdrog wrote: »

take open eirs numbers with a pinch of salt, im around 1000+ meters from cab and get the following

There must be a closer cabinet that you are connected to.

keith_d99

Hi all,

Slightly off topic .. preparing to upgrade to Fibre and trying to work out distance from cabinet

Is the downstream attenuation reading on my ADSL model showing distance from the exchange?
If so is there anything that will give me actual distance from the cabinet?

Reason I ask is that I am only being offered 30mb VDSL even though I am about 200m from the cabinet (as the crow flies)

Thanks!
Keith.

ED E

Yep, its to where the current DSLAM is, always the exchange for ADSL like you have now.

200m from A cab doesn't mean its 200m to YOUR cab. You're more likely to be 1km from yours(which might be the exchange itself).

keith_d99

ED E wrote: »

Yep, its to where the current DSLAM is, always the exchange for ADSL like you have now.

200m from A cab doesn't mean its 200m to YOUR cab. You're more likely to be 1km from yours(which might be the exchange itself).

My ADSL Downstream is 23db (about 2km) - which would be about right for the exchange

Any idea why I would be offered just 30mb when my neighbours are being offered 80mb (same row of houses built 8 years ago)?

ED E

House 1, pair 43. House 2, pair 44.....house 7, pair 50. Your house, onto the next cable.

That's just one possibility. It may be due to works done before your house was even built. We can't see the cable path records so we can't tell exactly what. What we do know is though, if the test is accurate its tough luck, it won't be changed.

keith_d99

ED E wrote: »

House 1, pair 43. House 2, pair 44.....house 7, pair 50. Your house, onto the next cable.

That's just one possibility. It may be due to works done before your house was even built. We can't see the cable path records so we can't tell exactly what. What we do know is though, if the test is accurate its tough luck, it won't be changed.

Thanks for the reply Ed

Would my actual number be of any indication? I have an older phone number that was recycled (plenty of phone calls looking for Mr X in the early days) if that makes sense. Other phone numbers around me are much higher.

Probably just best to upgrade and hope for the best!

I still wouldn't mind getting more tech info to explain why ... will the installer have any more info? Would my provider's tech support have any more detail?

ED E

Only if it was a digit shorter would it have significance. Numbers are just assigned to lines which have their own line reference. Number can change willy nilly but the reference will persistent until a line is unused for long enough.

If the KNN tech is former Eircom maybe, otherwise you'd want to talk to an old timer who won't be involved in installs. 5pm on Friday at your local is a good contender there.

dazdrog

guil wrote: »

There must be a closer cabinet that you are connected to.

nope one cab serves the estate of 250 odd houses, the next closest cab is 1900-2000m away. theres one way into the estate and cable route follows that from the entrance of estate where the cab is

mass_debater

dazdrog wrote: »

nope one cab serves the estate of 250 odd houses, the next closest cab is 1900-2000m away. theres one way into the estate and cable route follows that from the entrance of estate where the cab is

Ye cannae defy the laws of physics captain!!!

dazdrog

mass_debater wrote: »

dazdrog wrote: »

nope one cab serves the estate of 250 odd houses, the next closest cab is 1900-2000m away. theres one way into the estate and cable route follows that from the entrance of estate where the cab is

Ye cannae defy the laws of physics captain!!!

and longer cable lengths to the next and closest cab at over 1800m away 100% cant support the speeds i get on my line. i know the cab im connected to its DBC1_046 (outside dife drogheda and also the only cab that serves my estate) its 800m if you dont follow the footpaths where the cables run along and just over 1000m if you do, and as ive said theres one route for cables into this estate that run from DBC1_040 (entrance of moneymore drogheda) all has been confirmed by 3 installers ive had out over the last few years. check yourself youll see that theres no other cab that could provide it



Line standard
VDSL2
VDSL standard Profile 17a

Channel type

None
Downstream line rate (kbit/s) 76151
Upstream line rate (kbit/s) 20478
Downstream attainable data rate(kbit/s) 77260
Upstream attainable data rate(kbit/s) 24146
Downstream SNR (dB) 10.3
Upstream SNR (dB) 10.6
Downstream line attenuation (dB) 14.3
Upstream line attenuation (dB) 4.9
Downstream output power (dBmV) 12.5
Upstream output power (dBmV) 2

ED E

Those rates are very good, atypical, but not impossible.

You should have:
No junctions until the drop
Overspeccd cabling
A very empty main cable

The copper lotto went well for you.

digiman

Can you tell from the modem web interface which exchange/cabinet you are connected to?

I guess it would be possible to get this info from the PPPoE initilization phase if you have a way to translate the CSID to an Eircom cabinet. You would need to mirror your WAN interface while the PPPoE session is being established and look for the CSID using wireshark.

ED E

Would a software client doing PPPoE and a bridged modem not be enough to manage it? Think the ATM network would still pass it back.

EDIT:BTW it'd tell you port/rack/shelf too, so if they an idiot installer pilfers your port you'd know.

digiman

ED E wrote: »

Would a software client doing PPPoE and a bridged modem not be enough to manage it? Think the ATM network would still pass it back.

EDIT:BTW it'd tell you port/rack/shelf too, so if they an idiot installer pilfers your port you'd know.

Actually I can't recall now if it will be sent back or not, it's really only required in the upstream direction so the modem can authenticate with BNG. So in that case it won't come back!!

But you are right it does give the local port at the DSLAM or OLT, you just won't be able to see it unless you are a radius server!!

f0zzy

OP here. @ED_E tried few things

- Disconnnected for few hours and reconnected - no change
- Disconnected and phoned Eir. Asked them to do an NGA Reset. Apparently the order/activation is still pending completion so that cant issue an NGA reset. The order has been pending completion for two weeks now. - Which seems a little unusual that it would take this line.

A neighbour 3-400 metres away closer to exchange upgraded and is getting 20Mb.

I guess I just have to wait until this completes and keeping ping Eir to get an update as no one for me to see state of order.

f0zzy

OP here again

Finally the order completed after over a month. Eir were able to adjust profile.

I am now getting 11.5 Mb, with 11ms latency - RESULT !

This is based on a 12MB profile.

Thanks for all input / advice ED_E, Packet, dazdrog and others !

Will give it a couple of weeks of steady state and see if can push it to 15 Mb