topic Re: line/noise margin in Broadband

line/noise margin

loverboi — Thu, 18 Apr 2024 12:02:45 GMT

hi i need some clarify:) 😄 that my line/noise margin is correct and its not fftp its router to master socket the old way and here's stats to go on thanks 🙂 😄

Router Statistics

System Up Time: 896:52:20

Port Status TxPkts RxPkts Collision Pkts Tx b/s Rx b/s Up Time WAN MER 124112331 285385542 0 12068 8868 176:33:35 LAN Up 185409454 272350083 4 593058 362521 896:52:20 WLAN (2.4 GHz) Up 18370135 537132 0 23216 0 896:50:16 WLAN (5 GHz) Up 541465732 257388318 0 0 0 303:50:50

Broadband Link Downstream Upstream Connection Speed 40000 kbps 8496 kbps Line Attenuation D1(13.7 dB) , D2(35.6 dB) , D3(55.9 dB) U0(5.2 dB) , U1(28.3 dB) , U2(44.4 dB) Noise Margin 11.3 dB 7.7 dB

Re: line/noise margin

jamesn123 — Thu, 18 Apr 2024 12:37:52 GMT

@loverboi

Looks like you are on the 40/10 package so those stats look correct.

Re: line/noise margin

Chrisee — Thu, 18 Apr 2024 12:41:22 GMT

@loverboi it looks like your service is limited to 40Mb/s which it is delivering. The downstream noise margin is 11dB which indicates the line could support higher speeds were you on the 80/20 tier as opposed to the 40/10 tier you are on currently. Where a line has a guaranteed minimum speed below 40Mb/s Sky tend to provision on 40/10 there is no real cost saving.

A high noise margin is a good thing as it makes the connection more resiliant but it comes at the cost of speed.

Re: line/noise margin

loverboi — Thu, 18 Apr 2024 21:39:16 GMT

@Chrisee @jamesn123 Hi thanks for the quick reply 🙂 😄

i had openreach replace my line as i was getting faults and after he installed the line he tested the line and was getting 60 down and 11 up but he said as im 0.3 miles from the cabinet he said i will only get 40 down and 11 up but when i use fast.com and sky's own checker im only getting the 37.5 but my guarantee is 36.9 but im fftc with fibre from the exchange to the cabinet and then copper to the home but when i went to the router settings im getting 40 but 8 up and i called sky and they blantly said no your line can only handle about 37.5 but i told them what im getting on the router page but they werent having it but i told them openreach man said that he can see 60 down and 11 up on his test but they sad no that cant be right? 😞 but sjy said he must be wrong the openreach man as they said they see a 40/10 stats not what he saw heres some pics to help you you all/everyone have a great day ahead 🙂 😄

Featured Products Downstream Line Rate(Mbps) Upstream Line Rate (Mbps) Downstream Handback
Threshold(Mbps) WBC FTTC Availability Date WBC SOGEA Availability Date High Low High Low VDSL Range A (Clean)

49 36.9 10 6 34.8 Unavailable Available VDSL Range B (Impacted)

48.1 34.5 9.9 5.3 27.4 Unavailable Available G.fast Range A (Clean)

-- -- -- -- -- Unavailable -- G.fast Range B (Impacted)

-- -- -- -- -- Unavailable --

Featured Products Downstream Line Rate(Mbps) Upstream Line Rate (Mbps) Downstream Range (Mbps) Availability Date FTTP Install Process FTTP on Demand 330 50 -- Available --

ADSL Products Downstream Line Rate (Mbps) Upstream Line Rate (Mbps) Downstream Range(Mbps) Availability Date WBC ADSL 2+ Up to 15 -- 8.5 to 19 Available WBC ADSL2+ Annex M Up to 15 Up to 1.5 8.5 to 19 Available ADSL Max Up to 7 -- 6 to 8 Available WBC Fixed Rate 2 -- -- Available Fixed Rate 2 -- -- Available

SOADSL Products Downstream Line Rate (Mbps) Upstream Line Rate (Mbps) Downstream Range(Mbps) WBC SOADSL Availability Date WBC SOADSL 2+ Up to 15.0 -- 8.5 to 19.0 Available SOADSL Max Up to 7.0 -- 6.0 to 8.0 Available SOADSL Fixed Rate Up to 2 -- -- Available

Other Offerings Availability Date VDSL Multicast Available

Exchange Product Restrictions Status FTTP Priority Exchange N WLR Withdrawal Y SOADSL Restriction N

FTTP is not available.

The exchange is not in a current fibre priority programme

Re: line/noise margin

Chrisee — Fri, 19 Apr 2024 07:31:37 GMT

@loverboi while you may live a few hundred meters from the cabinet it doesnt follow the line uses the most direct route and your line looks to be longer 0.3 miles.

Next point the Sky test show the speed to hub synchronises at but when testing on a device you lose roughly 8% of that bandwidth to network overheads to allow the system to route the data correctly. So a 40Mb/s sync will deliver up to 37Mb/s on a speed test as long as the connection from the hub to the device is faster.

Your line will have a handback (the speed Openreach release Sky from contract) of around 37.5 Mb/s which means Sky will have ordered a 40Mb/s down 10Mb/s up connection which your stats show has happened. We have raised this in the past with Sky where other customer's lines looked to easily deliver higher speeds than 40Mb/s without success.