Interleaving Question

[#1]

I am trying to help my neighbour out who I referred to Plusnet  I can sync at 8128 but he only gets 7680.  I replaced all his internal wiring and BT boxes’ I have gone through everything I can think off but he still cannot sync at 8128. Examples  master socket orange wire cut  BT-i plate fitted 4 new sockets that have internal filters lines so no need for filters on the outside of the BT sockets
Our BT lines is quite short because our BT exchange is a cross the road from us all wiring goes direct I was here when ours houses were built so watched them laying underground cables
My next thought is does his line have interleaving switched on?
His noise margin is the same as my settings
Puddy (jillweekes account)
Jojo could you compare both stats and let me know if iam going wrong someware i.e router drops connection
kevm1 account stats
Link Information
Uptime: 4 days, 10:48:56
Modulation: G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 7.680
Data Transferred (Sent/Received) [MB/MB]: 291,66 / 658,17
Output Power (Up/Down) [dBm]: 11,5 / 9,5
Line Attenuation (Up/Down) [dB]: 4,0 / 3,0
SN Margin (Up/Down) [dB]: 18,0 / 15,5
Vendor ID (Local/Remote): TMMB / ALCB
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 1 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote):    0 / 0
Error Seconds (Local/Remote): 70 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 1.329
HEC Errors (Up/Down): 0 / 1.062

[#2]

you could find this out quite easily...
Do a ping from your line, and a ping on their line.
if their ping to a reputable source (e.g. google, or bbc) takes 20-30ms more, it looks like interleaving.
I cant help more than that unfortunately without both sets of stats. it looks like IL is switched on (i believe its on by default on new sign ups - a ticket should get it removed)
Those are some pretty good stats 

[#3]

Aren't these two the wrong way around?

Quote

Line Attenuation (Up/Down) [dB]:  4,0 / 3,0 SN Margin (Up/Down) [dB]:  18,0 / 15,5

If the Attenuation really is that low (very possible given distance?) then having the SN margin that high would give a reduction in line speed.  My stats are:

Quote

Noise Margin:    4.0 dB                        26.0 dB Output Power:    18.0 dBm                        12.5 dBm Attenuation:    31.0 dB                        14.0 dB

But, I'm connected at 8128 with interleaving on (not Fastpath).

[#4]

Wrong. When syncing at full speed there will be spare noise margin left over, the higher that is the better. It means that when you get ADSL 2+ you will get a very high sync.

[#5]

I used to connect at 7616 with interleaving turned on, and now at 8128 with interleaving turned off.
My pings probably decreased around 10ms at the change, and i currently get around 17ms to www.bbc.co.uk

[#6]

Quote from: Matt_2k34

I cant help more than that unfortunately without both sets of stats.

I will ask my neighbour to do a ping test and post the results in the next few days
Hopefull jojo can post his stats to see if his line keeps losing its connection
LAN Status
Primary DNS: 212.159.6.9
Secondary DNS: 212.159.6.10    
IP Address 192.168.1.1
TX Packets 1439701
RX Packets 1352702
WAN Status 1
Enable yes
Line ADSL
Name Force9
Mode PPPoA
Up Time 134:35:10
IP
GW IP
TX Packets 6922270
TX Rate (Bps)6359
RX Packets 11626265
RX Rate (Bps) 48074
SDSL Information ADSL Information    ( SDSLADSL Firmware Version:  232201_A)
ATM Statistics
TX Cells 6177607
RX Cells 322131748
TX CRC errs 0
RX CRC errs 0
SDSL  Status ADSL
Mode G.DMT
State Showtime
Up Speed 448
Down Speed 8128
SNR Margin 14
Loop Att 2

I cannot find the hec crc or fec errors in my new draytel 2710n router

Thanks again for all  the help
Puddy