Fibre finally installed

We went live on FTTC today after it originally being planned for July last year.

Looking good so far

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 32.8 31.0
Attn(dB): 0.0 0.0
Pwr(dBm): 9.6 -9.6

Max: Upstream rate = 42697 Kbps, Downstream rate = 142604 Kbps
Path: 0, Upstream rate = 10000 Kbps, Downstream rate = 39998 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3939)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3939)

VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 42697 kbps 142604 kbps
Actual Aggregate Tx Power: - 9.6 dBm 9.6 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 2.2 8.9 11.3 N/A 5.0 10.9 16.5

Signal Attenuation(dB): 0.0 N/A 10.2 N/A 5.0 10.9 16.5

SNR Margin(dB): 31.1 N/A 31.0 N/A 31.7 33.4 33.1

TX Power(dBm): -25.8 -128.0 -9.5 N/A 6.0 4.5 3.5

It is nice when it does happen.
It's been 2 weeks now and being able to watch Iplayer HD and lovefilm streaming without any stutter is fab.
Bit envious of being able to see stats, ECI modems are being problematic I hear.

just out of interest, why does your modem say it's annex b - i thought the standard in the uk was annex a, annex b being used in central and eastern europe.

VDSL2 is Annex B now.

As in legacy ADSL and ADSL2+, VDSL2 includes regional bandplan annexes that specify PSD Mask for numerous regional bandplans and are designed to provide coexistence with other services. Annex A specifies bandplans for the North American region and enables VDSL2 to be deployed with traditional POTS telephony or in an all-digital mode (similar to Annex J in ADSL2). Annex B specifies bandplans for Europe and enables VDSL2 deployment with underlying POTS and ISDN services. Annex C allows VDSL2 to coexist with TCMISDN services, found primarily in Japan

Edited by Adsl24 (Wed 29-Feb-12 15:59:09)

I take it from your stats that the cabinet is just outside your window?

In reply to a post by Bald_Eagle1:

I take it from your stats that the cabinet is just outside your window?

Or no one else on it yet. Mine has dropped from 132Mbit to 122Mbit as the cab fills up

We're now on the 80/20Mb service.

Speedtest: [IMG]http://www.speedtest.net/result/1814247882.png[/IMG]

Direct comparison below:

40/10 service:

Down Up
SNR (dB): 32.8 31.0
Attn(dB): 0.0 0.0
Pwr(dBm): 9.6 -9.6
Max: Upstream rate = 42697 Kbps, Downstream rate = 142604 Kbps
Path: 0, Upstream rate = 10000 Kbps, Downstream rate = 39998 Kbps

80/20 service:

Down Up
SNR (dB): 22.9 23.6
Attn(dB): 0.0 0.0
Pwr(dBm): 12.9 -7.2
Max: Upstream rate = 43179 Kbps, Downstream rate = 137776 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 79999 Kbps

Very nice too ! I seem to recall that you were within spitting distance of the cab.

No chance that your router shows a bits per bin graph ? Also do you have a 'before and after' for that ?

Yes, the cab is just across the road.

I did start the graphing tool that has been released for the Openreach HG612 modem, so I have some images/graphs/data from before and after - what in particular are you looking for?

James

Just interested, no 80/20 circuits round this way AFAIK, I was presuming that it just occupies more of the higher bins, and wondered if this was right.

I've got two more FTTC lines going in tomorrow/Wednesday, so will also be (MLPPP) bonding the lines to see if we can get over 100Mb

What speeds did your lines get before fibre?

Around 4-5 Mb but they were so unstable it sucked. We've gone from 4Mb to 75Mb in two days

We now have 3 FTTC lines installed.

2 are on 80/20 and 1 is on 40/10.

We're testing the (MLPPP) bonding of the 2 x 80/20 lines and at present are just scraping 100Mb downstream and 30Mb upstream throughput:

http://www.speedtest.net/result/1818623063.png

The attainable rate has dropped since all 3 lines have been installed, evidence of some form of crosstalk etc, but on the 80/20 lines it still shows:

Downstream Upstream
Attainable rate (kbit/s) 129948 41437
SNR margin (dB) 19.9 19.6
Line rate (kbit/s) 79999 20000

Edited by Adsl24 (Wed 07-Mar-12 09:10:48)

Looks like you're losing an awful lot of throughput somewhere along the line?

Keep on like that James, and you'll be able to offer ethernet and wireless connections to local customers.

Yeah, it could be that the box we're using as the router to bond the lines could be struggling (even though its a Linux PC so decent spec, with gigabit cards inside)... as it won't creep above the 100Mb mark.

Either that of or the speedtest isn't coping.

May only allocate 100Mb to a test at max.

speedtest.net should handle near 1gbit/sec - although I guess it depends on which server you're testing against?

Nice roughly half my line attenuation 100 meter line?

I think crosstalk will in time chop some of that max rate down, but hey there is plenty of it


heres my stats with a fullish cab and 300 meter line.

Attainable Net Data Rate: 33659 kbps 94040 kbps
Actual Aggregate Tx Power: 2.8 dBm 13.1 dBm
================================================== ==========================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 3.1 15.0 21.0 N/A 8.5 18.6 28.9

Signal Attenuation(dB): 8.3 15.4 20.2 N/A 8.5 18.6 28.9

SNR Margin(dB): 22.9 22.6 22.9 N/A 21.5 21.8 21.6

TX Power(dBm): -11.6 -128.0 2.7 N/A 9.8 8.2 6.3

Edited by lockyatlrg (Wed 07-Mar-12 19:27:12)

Yeah, I think it may be a limit on the Cisco port or something at the network centre as in reality the MLPPP bonding has never ever reached 100Mb before (bonding ADSL links) so it could be that the port is limited to 100Mb. We'll find out either way

Is this what you are using?

CCS Power Router will bond to speeds of 100Mb/s

From here.

On our side we're using a Linux PC 9acting as a router) with 4 Gigabit LAN cards.

So its no limitation on our side but could be on our suppliers side where the lines terminate at the LNS on the Cisco routers they use to enable the MLPPP bonding service.

I'll speak with their NOC tomorrow.

In reply to a post by Stoo:

speedtest.net should handle near 1gbit/sec - although I guess it depends on which server you're testing against?

Indeed - I find that the "Trance FM" server in London, which is the one it wants to use for me by default, can't handle more than about 40-50Mbps, so I have to use a different one.

James,

I have posted a ticket with ADSL 24, please could reply/explain what process of bonding you are using.

I am currently looking into buying a router of some form - Am I correct in saying that the Routerboard would not be sufficient if I were looking at 80/20 x2?

Is there a simpler solution than utilising a PC with Linux as you are, in order to get the desired throughput? Would a router like the cisco dual WANs be appropriate, or are these just for resillience/load balancing.

Cheers

Do ADSL24 support per packet bonding? And what are the pros of utilising MLPPP on your linux based PC/router over a dedicated device such as the firebrick 2700?