Who determines sync rate : Telkom or ISP

Dolby

Dolby

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At 20mbps I get a 6.2db noise - which I believe is borderline and possibly the reason for my hourly disconnects.

During the rain now it was dead and would connect but doing the storm I kept refreshing to see the sync speed if I got one. I noticed the modem would sync at different speeds (12xxx, 14xxx, 17xxx, 19xxx and 20xxx) with obviously lower noise, the lower the speed.

Right now the storm is over and I have connectivity - I notice it synced itself at 14xxx with 14.3db noise. I recckon if it synced at 17xxx, things would ok.

Who choose the speed?

Telkom manages my line
 
Telkom sets your max sync speed and your router will attempt to get to close to it as possible.
 
:(

So if I tell Cw that I sent the 10mbit package, what happens?
 
Last edited:
What you are seeing is a system Telkom has implemented to "auto" stabilize the line. It is only implemented on the Upt to 20Mbps ADSL2+ and VDSL and up to 40Mbps VDSL.

It works like this. Telkom would try and sync at the highest that the line can handle with the rule that it must not drop the SNR to below 6dB.

With a storm or heavy rain this means that there is only slight room for any type of variation of the SNR and if it would drop too low the line drops and resyncs at a slower speed.

There is sadly no manual stabilization profiles like they have for the up to 10Mbps where they can manually set a lower sync speed to have a more stable line.


So that is how the adsl line sync part work. You can still use any speed uncapped account on any speed line. The speed will just then be determined by which ever one is the slowest between the adsl line and account.
 
cavedog said:
You can still use any speed uncapped account on any speed line. The speed will just then be determined by which ever one is the slowest between the adsl line and account.
Click to expand...

Thanks - understood.

So I leave my line running at 20mbps with average 6.2db - and then ask CW for a 10mbps line - I'll be running at 10mbps but still the 6.2db noise?
 
Dolby said:
Thanks - understood.

So I leave my line running at 20mbps with average 6.2db - and then ask CW for a 10mbps line - I'll be running at 10mbps but still the 6.2db noise?
Click to expand...

Who do you pay for your line? You can downgrade from 20Mbps to 10Mbps adsl line if you want. You will be wasting money if you take a 10Mbps uncapped adsl account on a 20Mbps adsl line. If you go uncapped it would be best to match your line and account speed.

It would be waste of money to have a 20Mbps but a 10Mbps uncapped account because you will only be getting 10Mbps due to the account limit while your line can actually go 20Mbps.
 
I pay Telkom.

I thought maybe I keep Telkom at 20mps but get a 10mps package, noise will reduce
 
cavedog said:
What you are seeing is a system Telkom has implemented to "auto" stabilize the line. It is only implemented on the Upt to 20Mbps ADSL2+ and VDSL and up to 40Mbps VDSL.

It works like this. Telkom would try and sync at the highest that the line can handle with the rule that it must not drop the SNR to below 6dB.

With a storm or heavy rain this means that there is only slight room for any type of variation of the SNR and if it would drop too low the line drops and resyncs at a slower speed.

There is sadly no manual stabilization profiles like they have for the up to 10Mbps where they can manually set a lower sync speed to have a more stable line.


So that is how the adsl line sync part work. You can still use any speed uncapped account on any speed line. The speed will just then be determined by which ever one is the slowest between the adsl line and account.
Click to expand...

The router does the negotiation.
 
Dolby said:
I pay Telkom.

I thought maybe I keep Telkom at 20mps but get a 10mps package, noise will reduce
Click to expand...

Nope the account only plays a role in the speed the line allows. You would need to downgrade to 10Mbps and then your SNR will increase.

Chevron said:
The router does the negotiation.
Click to expand...

Fair enough but Telkom now plays a more active role by not allowing the SNR to drop below 6dB. Usually your could manupilate the target SNR to get higher sync rates but Telkom implemented something preventing any change if it will drop the SNR below 6dB.... Then they also introduced interleave mode if they think your line is not stable enough.....
 
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