Eircom say max speed = 3meg , got 6

ninja 12

Hi all ,

Just recently moved house and got a new line for broadband .

Eircom say I'll be getting max 3meg , but router and Speedtest.net say otherwise .

How common is this ?

Router stats and speedtest results are below .










Speedtest was done using my phone via Wi-Fi

Steam downloads at 600-650 kbps .

What are the CRC Errors (10620) about , is it bad ?


Thanks

advertsfox

Looks like you are probably on an 8MB profile but are only syncing at about 6.7MB,this is why you are getting CRC errors (these occur when the line is poor / is dropping). A 6MB profile should be 6144 / 512 kbps. You do have quite a high attenuation (higher = greater distance from exchange) so if you ask Eircom to drop your profile to 6MB instead, that should be the absolute best stable speed you will receive + they can do it in minutes.

ED E

Down snr is too low. 5Mb profile imo.

ninja 12

Thanks for the replies .

In real term , what do the errors mean ? and what sort of problems will they cause ?

Browsing / downloading seems stable so far ( broadband only got enabled yesterday )



The engineer ran new cables from pole to pole down the road as part of the install ( the phone line was disconnected from the house over a year ago ).

From what I gather , my neighbours get about 3 meg , so I'm surprised ( but happy) I'm getting the speed that I am .

ED E

You can get disconnects due to it. If performance is good you can leave it for now and just have them change it if problems crop up.

ninja 12

ED E wrote: »

You can get disconnects due to it. If performance is good you can leave it for now and just have them change it if problems crop up.

So , unless I start getting random disconnects I can just leave it alone ?

Great news , thanks

ninja 12

Just an update on this ,

Logged in to my router this morning and Eircom have reduced my download speed a bit , but I have minimal CRC errors

ED E

If you didn't call em they won't have changed it. Its dropping and re-syncing at the best it can at that particular point in time. This time it happens to be at a nice level.

Again, no biggie until it becomes an issue for you.

AlanS181824

When I had Sky they said the max my line could handle was 11Mb and Eircom said this too.

But for 8 months I always got 16Mb.

So I wouldn't trust what Eircom say and just take it with a pinch of salt.

ninja 12

Just thought I'd give an update on this .


A couple of days after my last post on this thread I noticed that my download speed had dropped to 400kbps.

I logged in to my router and it was synced at a 4meg profile .

I put my phone number into Eircom's line checker and it told me that the max speed I could get was 4meg .

I rang Eircom's broadband support number and was talking to a very helpful guy who explained that 4meg was the highest speed with guaranteed stability but he could bump it up and see how it went .

He bumped it to 5meg with no problems and said his system was giving him a warning about stability if he went any higher .

He set it to 6 ( on my request ) even though his computer advised against doing so , and it's been fine since .


Downloading from Steam is now back up to over 600 kbps









Eircom also sent me a new router , a Zyxel D1000 .

I had a Zyxel router before and had nothing but trouble with it (wifi dropping , not connecting all the time to one of my computers etc. )
and I'm currently using a Motorola 2247-42-10NA (the one with IP phone capability )

This new Zyxel router that I received is different to the one I had before ( this one has a USB3 socket on it ).


Is the new Zyxel better that my Motorola ?
Any advice ?

Thanks

Snaga

Every line has a different noise profile which can effect your SNR and different modems can impact line stats in different ways (though usually _very_ subtly). These are both exaggerated on very long lines where a small difference can give you an extra Mbps and can make a huge difference to your BB quality.

See your snr margin is about 7db, a stable snr on an average line is usually considered to be 9db for ADSL2+ and the eircom line checker may well use 9db as a guide which is why the recommended figure is 3Mbps.

Think of your SNR margin as a safety net of signal strength (for your synced speed) over the noise floor on the line. You can trade some of this safety net off for extra bandwidth (Which is what you were doing going from 4Mbps to 5Mbps to 6Mbps) but if you get noise (impulse or otherwise) on the line that exceeds or gets close to your snr margin then you can start getting errors (like CRC errors) and ultimately the ADSL link may drop and retrain leading to instability.

You should check your settings regularly at different times of the day and see if this SNR Margin value tapers off a bit in the evenings or nighttime. (Make sure you always record the sync speed as well as the SNR margin as the figures are useless in isolation).

If it stays stable over several days (check in the morning, midday and early and late evenings, also weekends) then you have a very stable noise profile and you should be fine on a 7db SNR margin.

Check with both modems and see if one gives you a consistently higher SNR margin on your particular line, even if the sync speed is the same, even 1 extra db of snr margin will make the ADSL service more robust.

If you find that the SNR margin drops at certain times and you get a corresponding uptick in CRC errors are increasing or your line is disconnecting then you might be better off moving back to 5Mbps.

Bog Standard User

ninja 12 wrote: »

Just thought I'd give an update on this .


A couple of days after my last post on this thread I noticed that my download speed had dropped to 400kbps.

I logged in to my router and it was synced at a 4meg profile .

I put my phone number into Eircom's line checker and it told me that the max speed I could get was 4meg .

I rang Eircom's broadband support number and was talking to a very helpful guy who explained that 4meg was the highest speed with guaranteed stability but he could bump it up and see how it went .

He bumped it to 5meg with no problems and said his system was giving him a warning about stability if he went any higher .

He set it to 6 ( on my request ) even though his computer advised against doing so , and it's been fine since .


Downloading from Steam is now back up to over 600 kbps









Eircom also sent me a new router , a Zyxel D1000 .

I had a Zyxel router before and had nothing but trouble with it (wifi dropping , not connecting all the time to one of my computers etc. )
and I'm currently using a Motorola 2247-42-10NA (the one with IP phone capability )

This new Zyxel router that I received is different to the one I had before ( this one has a USB3 socket on it ).


Is the new Zyxel better that my Motorola ?
Any advice ?

Thanks

the d1000 modem aint bad... it holds sync way better than the p660's did its wifi is pretty decent for an oem modem.

the motorala modem was a good modem but the big fat ac adapters on them fail and generate noise on the line. but the motorola modem will work using the d1000's ac adapter and therefore mitigates the noise problem the motorola's ac adapter generates

ninja 12

Snaga wrote: »

Every line has a different noise profile which can effect your SNR and different modems can impact line stats in different ways (though usually _very_ subtly). These are both exaggerated on very long lines where a small difference can give you an extra Mbps and can make a huge difference to your BB quality.

See your snr margin is about 7db, a stable snr on an average line is usually considered to be 9db for ADSL2+ and the eircom line checker may well use 9db as a guide which is why the recommended figure is 3Mbps.

Think of your SNR margin as a safety net of signal strength (for your synced speed) over the noise floor on the line. You can trade some of this safety net off for extra bandwidth (Which is what you were doing going from 4Mbps to 5Mbps to 6Mbps) but if you get noise (impulse or otherwise) on the line that exceeds or gets close to your snr margin then you can start getting errors (like CRC errors) and ultimately the ADSL link may drop and retrain leading to instability.

You should check your settings regularly at different times of the day and see if this SNR Margin value tapers off a bit in the evenings or nighttime. (Make sure you always record the sync speed as well as the SNR margin as the figures are useless in isolation).

If it stays stable over several days (check in the morning, midday and early and late evenings, also weekends) then you have a very stable noise profile and you should be fine on a 7db SNR margin.

Check with both modems and see if one gives you a consistently higher SNR margin on your particular line, even if the sync speed is the same, even 1 extra db of snr margin will make the ADSL service more robust.

If you find that the SNR margin drops at certain times and you get a corresponding uptick in CRC errors are increasing or your line is disconnecting then you might be better off moving back to 5Mbps.

I've been using the Zyxel D1000 for the last while , and so far so good .

With the Zyxel , I seem to be getting a consistent 1db higher SN Margin on the downstream reading than the Motorolla

Bog Standard User wrote: »

the d1000 modem aint bad... it holds sync way better than the p660's did its wifi is pretty decent for an oem modem.

the motorala modem was a good modem but the big fat ac adapters on them fail and generate noise on the line. but the motorola modem will work using the d1000's ac adapter and therefore mitigates the noise problem the motorola's ac adapter generates

The D1000 seemt to be a decent improvement on the last Zyxel that I tried , and it runs a lot cooler than the Motorolla that I've been using for the last couple of years .

My Motorolla has now been retired , and will be kept as a spare