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Author Topic: Odd Interleaving  (Read 1299 times)

tickmike

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Odd Interleaving
« on: March 17, 2017, 02:33:55 PM »

Odd Interleaving.
I have been trying an old DG834GT for two weeks and have noticed that there are two interleaving sets of data.
----------------------------------------------------------------------------------------------------

adsl info --stats
adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 793 Kbps, Downstream rate = 3068 Kbps
Link Power State: L0
Mode:                   ADSL2
Channel:                Fast
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):       5.8             5.9
Attn(dB):       52.0            32.2
Pwr(dBm):       0.0             12.9
Max(Kbps):      6352            804
Rate (Kbps):    3068            793
                        G.dmt framing
K:              7(0)            15
R:              4               8
S:              1               16
D:              160             2<<<<<<<<<<<
                        ADSL2 framing
MSGc:           93              11
B:              6               14
M:              1               16
T:              9               7
R:              4               8
S:              0.0718          9.5845
L:              1225            207
D:              416             2<<<<<<<<<<<
                        Counters
SF:             5240891         4933157
SFErr(CRCErr):  686             0
RS:             374667458               611418
RSCorr:         240754849               0
RSUnCorr:       33933           0

HEC:            378             0
OCD:            62              0
LCD:            0               0
Total Cells:    606949473               1374487
Data Cells:     40202906                8464
Drop Cells:     361
Bit Errors:     0               0

ES:             1089            0
SES:            20              0
UAS:            372             0
AS(Uptime):     83865

INP:            5.43            0.30
PER:            16.00           17.82
delay:          7.47            4.79
OR:             49.49           7.63

Bitswap:        1068            79
Total uptime:   688218
 -------------------------------------------------------

I switched back yesterday from from forcing the modem on ADSL instead of what it is set to now ADSL2+ the interleaving was 32 D / 2 up
Hopefully in a few days the interleaving will come back down again.
On this modem I have noticed before you get 'G.dmt framing' and 'ADSL2 framing' .
Odd, How can this be ?.   :hmm:
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I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

Weaver

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Re: Odd Interleaving
« Reply #1 on: March 17, 2017, 04:02:18 PM »

Mad illiterate UI. It's usually illegal for hackers old or young to be able to string a few words together to make some plain English sensible text, in my experience. That's why I took charge of tech documentation personally most of the time.

But that doesn't really answer your question- you will need me to explain the cause of the madness?
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aesmith

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Re: Odd Interleaving
« Reply #2 on: March 18, 2017, 04:50:47 PM »

What strikes me is that at 52dB loss, 5.8dB noise margin, you should be running a whole lot faster than 3meg.
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ejs

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Re: Odd Interleaving
« Reply #3 on: March 18, 2017, 05:05:35 PM »

Presumably it's a 3Mb banded WBC (21CN) profile, which explains the high INP value (which is the reason for the high interleaving depth and FEC ratio).
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Weaver

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Re: Odd Interleaving
« Reply #4 on: March 19, 2017, 01:21:49 AM »

Agree with aesmith.
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tickmike

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Re: Odd Interleaving
« Reply #5 on: March 19, 2017, 11:14:23 PM »

What strikes me is that at 52dB loss, 5.8dB noise margin, you should be running a whole lot faster than 3meg.
I agree but I cannot get it to run faster.
@ejs re' Presumably it's a 3Mb banded WBC (21CN) profile' is that banded by my isp ?.
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I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

ejs

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Re: Odd Interleaving
« Reply #6 on: March 20, 2017, 05:29:16 AM »

The banding will probably have been applied automatically by the DLM, but your ISP can remove it.
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tickmike

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Re: Odd Interleaving
« Reply #7 on: March 27, 2017, 02:10:12 AM »

I asked my ISP to re-set the DLM and this is there reply.

"I can see that the line has banded itself but it would appear that the line is currently operating at close to its maximum attainable rate. If I make changes to the DLM it could introduce intermittency to the connection."

"The line profile is currently 1M - 2M Medium delay (INP 4) 6dB Downstream, UC Low delay (INP 0) 6dB Upstream (ADSL2+)."

.
This profile is that what the ISP set up ? or is this the readings from what the DLM has done ?

Could the line profile be improved ?
Logged
I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

burakkucat

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Re: Odd Interleaving
« Reply #8 on: March 28, 2017, 01:46:49 AM »

I'm not sure that I fully understand what your ISP has stated.  ???

". . . the line has banded itself . . ." -- I shall assume that it was the DLM process which actually banded the line. In that case the profile quoted must therefore be the result of the DLM's action.

Could the profile be changed? Yes. It really depends upon what your ISP would be willing to do. If they just re-set the circuit, the DLM process would, very likely, intervene once again. If they are able to turn-off the DLM process then the circuit could be set with any parameter that is within the normal range.

Would that be a good thing? That is a question I could not answer. Either you or your ISP will better placed to know the characteristics of the circuit.

One thing to note about the current profile is that it is set to G.992.5 (ADSL2+). With an appropriate modem you can override that and configure the circuit as either G.992.1 (G.Dmt / "ADSL1") or G.992.3 (ADSL2). My personal feeling (and experience based on my own circuit) is that if the typical DS synchronisation speed is less than 8 Mbps then it would be best to configure the circuit as G.992.3 (ADSL2).
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tickmike

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Re: Odd Interleaving
« Reply #9 on: March 28, 2017, 11:33:23 PM »

I'm not sure that I fully understand what your ISP has stated.  ???
I think it was a new chap, I got a more experience chap phone me up today from Eclipse, He said they could do a DLM re-set (In which he did) He could change the target SNR Margin (Left mine at 6dB) They also can set INP ( Set to 4 DS, 2 US).

Quote
One thing to note about the current profile is that it is set to G.992.5 (ADSL2+).
   Yes I was doing a test, it is back on ADSL2 now.

I did a BT Wholesale speed test and the downstream is the best it has ever been.

Download speedachieved during the test was - 4.7 Mbps
 For your connection, the acceptable range of speeds is 1.2 Mbps-4 Mbps.
 IP Profile for your line is - 3.6 Mbps


Upload speed achieved during the test was - 0.49Mbps
 Additional Information:
 Upstream Rate IP profile on your line is - 0.83 Mbps



adsl info --stats
adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 8000
Channel: FAST, Upstream rate = 728 Kbps, Downstream rate = 4078 Kbps
Link Power State: L0
Mode:                   ADSL2
Channel:                Fast
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):       6.6             5.5
Attn(dB):       51.0            32.2
Pwr(dBm):       0.0             12.9
Max(Kbps):      5012            728
Rate (Kbps):    4078            728
                        G.dmt framing
K:              128(0)          23
R:              10              14
S:              1               4
D:              32              8
                        ADSL2 framing
MSGc:           59              12
B:              127             22
M:              1               4
T:              1               4
R:              10              14
S:              0.9963          4.0000
L:              1108            212
D:              32              8
                        Counters
SF:             431582          388170
SFErr(CRCErr):  41              0
RS:             28052842                2692097
RSCorr:         4845397         0
RSUnCorr:       716             0

HEC:            38              0
OCD:            1               0
LCD:            0               0
Total Cells:    67220483                729337
Data Cells:     6452799         12170
Drop Cells:     369
Bit Errors:     0               0

ES:             15081           0
SES:            11888           0
UAS:            774             0
AS(Uptime):     6988

INP:            1.15            2.11
PER:            16.19           18.00
delay:          7.97            8.00
OR:             32.11           8.00

I note the interleaving has come down to 32/8 .
« Last Edit: March 28, 2017, 11:44:45 PM by tickmike »
Logged
I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

burakkucat

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Re: Odd Interleaving
« Reply #10 on: March 28, 2017, 11:50:43 PM »

Upload speed achieved during the test was - 0.49Mbps

That upstream speed is still somewhat disappointing.
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tickmike

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Re: Odd Interleaving
« Reply #11 on: March 29, 2017, 01:02:43 AM »

That upstream speed is still somewhat disappointing.
Yes it is, I noticed it peeked at 1.28Mbps on one up load test I did.
I will see how it goes for the next 10 days training .
Also see what Eclipse say in an email they are sending me about the setting they have used, maybe room for a few more tweaks..
Logged
I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

tickmike

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  • Yes Another Penguin !. :)
    • Free Download from.
Re: Odd Interleaving
« Reply #12 on: March 29, 2017, 11:27:56 PM »

Does anyone know if you can have a 3dB Target SNR Margin on the UP stream only, keeping the Down stream at 6dB ?.
I am on 21CN  exchange  so it would have to be set by my isp.
Logged
I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet

burakkucat

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Re: Odd Interleaving
« Reply #13 on: March 29, 2017, 11:50:07 PM »

Sorry, I have no idea. It might be best if you just ask your ISP . . .
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Please consider making a donation to support the running of this site.

tickmike

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Re: Odd Interleaving
« Reply #14 on: March 30, 2017, 12:37:14 AM »

Just sent them an email.
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I RECOMMEND TRYING / USING PCLinuxOS (www.pclinuxos.com) .
I have a set of 8 fixed IP's From my Eclipse isp.
BT ADSL2 line>HG612 set as a Modem, Bridge, WAN not Bound to LAN1 or 2 >Smoothwall (Hardware Firewall and routing) > Ethernet LAN, DMZ,WiFI LAN and Spare LAN .
DSLstats LAN2  linked Ethernet
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