Isn't DSL technolgy amazing?
bod43
I occasionally check my router logs just to see what is
afoot and on the most recent occasion noticed.
Jul 24 13:16:03.449 BST: %DSLSAR-1-DOWNGRADEDBW: PCR
and SCR for VCD 1 (0/38) has been reduced to 64k 64k due
to insufficient upstream bandwidth
Jul 24 13:18:03.079 BST: %DSLSAR-1-DOWNGRADEDBW: PCR
and SCR for VCD 1 (0/38) has been reduced to 64k 64k
due to insufficient upstream bandwidth
Every three minutes for ever.
The ATM interface is also going up and down a few
times an hour on average. (now realise 28 in 19 hours)
Sure enough upstream signalling rate is 64k.
Speed test says the same, 1.5Mbps down and 52kbps up.
I usually get 3M+ down and 300k up on test, or thereby,
with signalling rates of 8M down and 448k up.
In retrospect realise that minor internet slowness
perception is probably not down to aging computer
or an artefact of my impatience:)
Reed-solomon errors are about 10% of traffic.
These are *corrected* errors. The data ends up being good
without retransmission. There are *zero* uncorrected errors
in 0.5M cells (53 bytes each).
I eventually realised that there was a horrendous noise
audible on the phone line. An extremely harsh
and very loud buzzing noise (audible across the
room as soon as phone is lifted from cradle).
More like clicks with a rate of quite a few a second or
maybe 10s a second. Reminds me of dolphin echo location
clicks as heard on TV.
Phone is unusable, automatic BT line test says it is
broken.
Point is, DSL works even AT ALL. :-)) AMAZING.
I can watch BBCiPlayer and it seems OK. This
has been going on for days. (I more or less never use
the phone for voice calls.)
Here is the technical info in case anyone cares.
Stats are reset every time the line comes up.
ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.1 (G.DMT) Annex A
ITU STD NUM: 0x03 0x3
Vendor ID: 'STMI' 'TSTC'
Vendor Specific: 0x0000 0x0500
Vendor Country: 0x0F 0xB5
Chip ID: C196 (0)
DFE BOM: DFE3.0 Annex A (1)
Capacity Used: 100% 92%
Noise Margin: 4.0 dB 10.0 dB
Output Power: 19.0 dBm 12.5 dBm
Attenuation: 24.5 dB 11.5 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0xF7
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction: 0x00
Interrupts: 20897 (0 spurious)
PHY Access Err: 0
Activations: 28
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: init_AMR_4.0.018.bin
Operation FW: AMR-E-4.0.018.bin
FW Source: external
FW Version: 4.0.18
Interleave Fast Interleave Fast
Speed (kbps): 5824 0 64 0
Cells: 561292 0 309143 0
Reed-Solomon EC: 56233 0 0 0
CRC Errors: 0 0 0 0
Header Errors: 0 0 0 0
Total BER: 0E-0 0E-0
Leakage Average BER: 0E-0 0E-0
ATU-R (DS) ATU-C (US)
Bitswap: enabled enabled
Bitswap success: 0 0
Bitswap failure: 0 0
LOM Monitoring : Enabled
LOM watch configured for 200 times
LOM appeared continuously for 0 times
DMT Bits Per Bin
000: 0 0 0 0 0 0 0 0 0 2 2 2 2 3 2 3
010: 2 3 2 2 2 2 2 2 2 2 2 2 2 2 2 0
020: 0 5 6 5 5 7 6 7 7 7 7 8 7 9 7 7
030: 7 7 7 7 7 9 7 7 7 7 7 8 7 7 7 7
040: 0 7 7 7 7 7 7 7 7 7 7 8 7 7 7 7
050: 8 7 7 7 7 7 7 8 7 8 8 8 7 7 8 8
060: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
070: 8 8 8 8 8 8 8 8 8 8 7 7 8 8 8 8
080: 8 7 8 8 8 8 8 8 8 8 8 8 8 8 8 8
090: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
0A0: 8 2 8 8 8 8 8 7 8 8 8 8 8 8 8 8
0B0: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
0C0: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
0D0: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
0E0: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
0F0: 6 8 8 8 8 8 8 8 8 8 8 8 8 7 8 8
###################################
###################################
Here is a partial view of the normal operation
from last year. Sadly I did not record the full details.
Capacity Used: 83% 51%
Noise Margin: 11.0 dB 27.0 dB
Output Power: 18.5 dBm 12.5 dBm
Attenuation: 23.5 dB 10.5 dB
Interleave Fast Interleave Fast
Speed (kbps): 8192 0 448 0
I am about 600 meters as the crow flies from the exchange
and presumably not much further as the electron goes too.
I had considered asking ISP to switch me to "fast" from
"interleave", of course if I had managed to persuade them
I would very likely not have any service at all now.
Normally ping RTT is about 40ms to first hop.
I have previously noticed that I need two microfilters
in series to eliminate presumed DSL noise from the phone.
Phone in second one, DSL in first.
Mrs Miggins
news:58817ead-c329-4841...@d17g2000yqb.googlegroups.com...
MM
Rodney Pont
>Phone is unusable, automatic BT line test says it is
>broken.
Presumably you have a voice fault logged but does it still make the
noise with the ADSL modem unplugged?
>Point is, DSL works even AT ALL. :-)) AMAZING.
>I can watch BBCiPlayer and it seems OK. This
>has been going on for days. (I more or less never use
>the phone for voice calls.)
My line goes through some trees and has twice broken the wire so that
voice was dead but ADSL still ran although only at 1.5meg instead of
the usual 8meg.
--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail rpont (at) gmail (dot) com
Andrew Benham
> My line goes through some trees and has twice broken the wire so that
> voice was dead but ADSL still ran although only at 1.5meg instead of
> the usual 8meg.
Periodically BT's underground chamber down the hill from here fills up
with water. When the pressure of water gets high enough, we lose
dial-tone and there's no 48V on the pair - but ADSL still works with
a slight speed degradation.
An Openreach man pumped the water out the other day, says he's going to
get someone in to rod out the drainage pipe.
--
Andrew
bod43
> On Sun, 25 Jul 2010 00:15:25 -0700 (PDT), bod43 wrote:
> >Phone is unusable, automatic BT line test says it is
> >broken.
>
> Presumably you have a voice fault logged but does it still make the
> noise with the ADSL modem unplugged?
Yes I logged a fault. Line fails BT automatic test with everything
unplugged. Noise still persent ADSL router unplugged.