Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: mofa2020 on February 08, 2020, 07:13:41 PM
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I have a question about the profile 30a, I read that it can theoretically deliver upto 200/100mbps but for some reason many routers that support profile 30a stats that it support only upto 100mbps vdsl2 speed which is confusing me, for ex. vigor 2762 so how come this to be true? and what is the benefit of supporting 30a while limiting to 100mbps? other than having 100/100mbps speed.
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I doubt if any members (in the U.K.) will be able to give you a explanation.
Perhaps you could ask Draytek directly about the Vigor 2762? Looking at the specifications of the version that is available for the U.K. and Irish markets it just mentions "VDSL2 Profile: 8a, 8b, 8c, 8d, 12a, 12b, 17a, 30a". I do not see any obvious mention of a 100 Mbps limit for Profile 30a.
There is one difference between Profile 30a and all of the other VDSL2 profiles -- the sub-carriers (tones) are spaced every 8.625 kHz rather then every 4.3125 kHz, as with Profiles 8a to 17a.
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I do not see any obvious mention of a 100 Mbps limit for Profile 30a.
This is strange because it is mentioned on draytek.com "global website I believe" and not the UK website, I know that for UK there will be some differences in specifications but thought the base line will be the same for the modem. :hmm:
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The .com site shows the 2762 with a max NAT throughput on VDSL of 100Mbps.
https://www.draytek.com/products/vigor2762/#overview
Could that be the bottleneck you speak of?
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The .com site shows the 2762 with a max NAT throughput on VDSL of 100Mbps.
https://www.draytek.com/products/vigor2762/#overview
Could that be the bottleneck you speak of?
Yes that is the point I am asking about.
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Yes that is the point I am asking about.
Then its basically just the CPU that is under-powered, nothing to do with the modem.
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I've got a UK 2862. On the .com site it's advertised with the same 100Mbits throughput limit but I see no mention of this limit an the co.uk site. The co.uk site just lists a firewall throughput of 400Mbits. I've raised the question with Draytek UK support with reference to 2862 (as that's what I have registered with them). They will probably take a couple of days to respond...
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Then its basically just the CPU that is under-powered, nothing to do with the modem.
I see, so it would probably hold 100/100mbps.
I've got a UK 2862. On the .com site it's advertised with the same 100Mbits throughput limit but I see no mention of this limit an the co.uk site. The co.uk site just lists a firewall throughput of 400Mbits. I've raised the question with Draytek UK support with reference to 2862 (as that's what I have registered with them). They will probably take a couple of days to respond...
Thank you Silverback, looking forward to hearing their replay.
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I've got a UK 2862. On the .com site it's advertised with the same 100Mbits throughput limit but I see no mention of this limit an the co.uk site. The co.uk site just lists a firewall throughput of 400Mbits. I've raised the question with Draytek UK support with reference to 2862 (as that's what I have registered with them). They will probably take a couple of days to respond...
That's certainly curious as you'd except NAT throughput and Firewall throughput to basically mean the same thing.
Now throughput with PPP vs plain Ethernet, that will differ.
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Hi
Long gave up with Draytek kit, seems very expensive for what you actually get, but anyway...
It is quite likely the VDSL modem chipset is connected internally using a 100Meg Ethernet connection, so that gives it that hard 100 limit. The Firewall rating (400Meg) will be based on using the 1Gig WAN connection. Even then 400 Meg isn't particularly brilliant and the whole thing is running at 18 watts power consumption so it looks like an old design (like their UI) using an old SoC or discrete processor. Like I say, a lot of money for something that isn't very well specified.
Regards
Phil
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Hi
Long gave up with Draytek kit, seems very expensive for what you actually get, but anyway...
It is quite likely the VDSL modem chipset is connected internally using a 100Meg Ethernet connection, so that gives it that hard 100 limit. The Firewall rating (400Meg) will be based on using the 1Gig WAN connection. Even then 400 Meg isn't particularly brilliant and the whole thing is running at 18 watts power consumption so it looks like an old design (like their UI) using an old SoC or discrete processor. Like I say, a lot of money for something that isn't very well specified.
That would explain it, were thinking to get one actually but after what you said :no: though the amount of information about line stats is awesome but still not worth it for me.
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Hi
Do you have a profile 30a VDSL connection then?
Regards
Phil
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No I do not at the time, but I were thinking to replace my current ZTE (ISP one, I am not from UK) router and buy something that would be future proof and reliable at the same time.
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Hi
Long gave up with Draytek kit, seems very expensive for what you actually get, but anyway...
It is quite likely the VDSL modem chipset is connected internally using a 100Meg Ethernet connection, so that gives it that hard 100 limit. The Firewall rating (400Meg) will be based on using the 1Gig WAN connection. Even then 400 Meg isn't particularly brilliant and the whole thing is running at 18 watts power consumption so it looks like an old design (like their UI) using an old SoC or discrete processor. Like I say, a lot of money for something that isn't very well specified.
Regards
Phil
For me, the jury is still out. With 17a VDSL2 the 100Mbit throughput limit is a non-issue really. It's got an Gigabit Ethernet LAN port also. I'm currently running it with a HG612 and I think that is maxed out at 80Mbps... would only become a problem if OpenReach go for 30a profile but form what I understand that is unlikely to happen.
The latest Draytek (2865, 2765, 165) all seem to tout 300Mbits DSL throughput.
The Draytekk don't seem to run the latest hardware, I guess that's a strategy. It has a reasonable feature set. Having said that I don't think I would buy a dual modem / router again, but DSL modem choice is limited...
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OpenReach can't/won't roll out profile 30a, there's no worries there.
It runs in the G.Fast spectrum and I don't think it's backward compatible with 17a.
Profile 35b was much more likely before G.Fast was chosen. Now neither are likely.
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Hi
No I do not at the time, but I were thinking to replace my current ZTE (ISP one, I am not from UK) router and buy something that would be future proof and reliable at the same time.
I see that makes sense to get something future proof if may upgrade to 30a, not likely to ever happen in the UK for us.
For me, the jury is still out. With 17a VDSL2 the 100Mbit throughput limit is a non-issue really. It's got an Gigabit Ethernet LAN port also. I'm currently running it with a HG612 and I think that is maxed out at 80Mbps... would only become a problem if OpenReach go for 30a profile but form what I understand that is unlikely to happen.
No I don't think 30a would ever happen in the UK, and it should work just fine when you get FTTP up to the 300 Meg package as it will do 400 Meg.
Regards
Phil
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I don't think 30a would ever happen in the UK, and it should work just fine when you get FTTP up to the 300 Meg package as it will do 400 Meg.
Do bear in mind that NAT speed is usually measured ethernet to ethernet, it reduces dramatically once you add the CPU overhead of PPP.
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Sounds like g.fast has been stalled in preference for FTTP. I recently saw OpenReach were offering free connection to any new housing development with more than 20 residential properties.
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I've got a UK 2862. On the .com site it's advertised with the same 100Mbits throughput limit but I see no mention of this limit an the co.uk site. The co.uk site just lists a firewall throughput of 400Mbits. I've raised the question with Draytek UK support with reference to 2862 (as that's what I have registered with them). They will probably take a couple of days to respond...
Well, the attempt was worth two emails.
Response basically was: 2762 = 300Mbps and 2862 was 400Mbits. Don't look at the .com site as spec may differ.
I did ask about NAT throughput specifically (twice) but I don't think anything more will be gained by further hounding...
I'm not sure who one would test without 30a or some unit on the bench that could be the DSLAM end...
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Well, the attempt was worth two emails.
Response basically was: 2762 = 300Mbps and 2862 was 400Mbits. Don't look at the .com site as spec may differ.
I did ask about NAT throughput specifically (twice) but I don't think anything more will be gained by further hounding...
I'm not sure who one would test without 30a or some unit on the bench that could be the DSLAM end...
Thank you Silverback, it makes sense now after being confused by .com and .uk information maybe I will settle with 2762 after all since there is not much difference than 2862.
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I'm not sure who one would test without 30a or some unit on the bench that could be the DSLAM end...
A Planet VC-231 (https://www.planet.com.tw/en/product/vc-231) can be configured for Profile 30a and should do the job quite nicely. :)
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A Planet VC-231 (https://www.planet.com.tw/en/product/vc-231) can be configured for Profile 30a and should do the job quite nicely. :)
Has anyone tried using one as a modem ? ;)
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A Planet VC-231 (https://www.planet.com.tw/en/product/vc-231) can be configured for Profile 30a and should do the job quite nicely. :)
Ahhhh... that looks interesting... CO mode...
I don't see G.INP 998.4 in the specs tho...
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FWIW, I use a Draytek Vigor 130 modem. By default it's got a firmware that works out of the box for BT, using VLAN 101 and profile 17a and also has the ability to do G.INP / ReTX but it can be configured to use 30a and any SNR tuning as required.
It has a 1gbps Ethernet interface to the router, but I have no idea what the internal connection between modem, CPU and Ethernet is. I do know it's based on Lantiq silicon.
It will present an Web Admin screen and telnet on the interface and give a DHCP address for 192.168.1.0/24 by configuring the actual interface connected to it, while a PPPoE virtual interface on top of that physical interface will still handle the WAN connection. I don't think there's actually a lot of difference between the silicon used in the Vigor 130 and its more expensive brethren, as there's a lot of configuration related to it being a router that's just not possible with 1 port. Hope that helps.
The HG612 (3B that I have) meanwhile only has a 100mbps LAN port...
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I think the 130 is a Lantiq V9 chip where as the more recent stuff (2862 Inc) since Intel brought Lantiq are Intel / Lantiq PXB4369EL - V2.1 based.