justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
 ·AT&T Midwest
| reply to lev
Re: Any 5100b technician page DMT/SNR data experts
Here's a summary of what I've been up to.
Last night, I compared 3 different modems data results to see how they all compared.
I have a 5660 (v2.3.0(7)).
I have a 5100b (v1.0.0.44).
I have a ADSL2/2+ diagnostic analyzer capable modem also. (Don't ask.) I'll refer to this as "PRIVATE".
Here's the results of plugging them in and forcing them to resync just a minutes or two apart from eachother.
These data points are to get a relative accuracy of the statistics provided by the different modems.
The line is configured for 1.5/384 Interleaved at this point.
2005/06/15 8:10pm 5100b
SNR: 16.0
ATN: 58.5
DMT: 472 bit bins
20050615/201033.txt
DMT SNR Data
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 17.5 17.5 17.5 17.5 17.0 17.0 17.0 17.0 17.0 17.0
333d
17.0 16.5 16.5 17.0 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5
333e
0.0 16.5 16.5 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333f
16.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.5 16.0 16.0 16.0 16.0 16.0
333g
16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.5 16.0 16.5 16.0 16.0 16.0 16.0 16.0
333h
16.0 16.0 17.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.5 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 6 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 8 8
334d
8 8 8 8 8 8 8 8 8 8 8 8 7 7 7 7
334e
0 7 7 6 6 6 6 6 6 6 6 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
334g
5 5 5 4 4 4 4 4 4 4 4 4 4 4 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2005/06/15 8:15pm 5660
Current Attainable Rate 573134 3200000
Current SNR Margin 13.5 16.0
Current Attenuation 59.0 31.5
Current Output Power 4.0 17.5
2005/06/15 8:17pm 5660. Changed some wires and resynced.
Current Attainable Rate 573134 3200000
Current SNR Margin 12.5 16.0
Current Attenuation 58.0 31.5
Current Output Power 4.0 17.5
2005/06/15 8:19pm 5660. Sampled again
Current Attainable Rate 573134 3200000
Current SNR Margin 13.5 16.0
Current Attenuation 58.5 31.5
Current Output Power 4.0 17.5
2005/06/15 8:20pm PRIVATE modem
SNR: 11.4 16.0
ATN: 62.5 31.5
PWR: 3.1 17.5
RAT: 2528 1088
2005/06/15 8:23pm PRIVATE (with noise margin checking)
SNR: 16.0 16.0
ATN: 62.0 31.5
PWR: 3.2 15.5
RAT: 3200 1088
2005/06/15 8:26pm PRIVATE (in ADSL2 diagnostic mode.)
SNR: 16.1 16.0
ATN: 62.0 31.5
PWR: 2.8 15.3
RAT: 3232 1100
2005/06/15 8:45pm PRIVATE (forced resync)
SNR: 16.5 16.0
ATN: 62.0 31.5
PWR: 2.8 14.9
RAT: 3328 1100
2005/06/15 8:56pm PRIVATE (another sample)
SNR: 16.1 16.0
ATN: 62.5 31.5
PWR: 2.9 14.9
RAT: 3328 1096
2005/06/15 9:10pm 5100b
SNR: 16.0
ATN: 58.0
DMT: 472 bits
20050615/211000.txt
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 17.5 17.5 17.5 17.5 17.0 17.0 17.0 17.0 17.0 17.0
333d
17.0 17.0 17.0 17.0 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5
333e
0.0 16.5 16.5 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333f
16.0 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.5 16.0 16.5 16.0
333g
16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5
333h
16.0 16.0 17.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.5 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 6 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 9 9
334d
9 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 7 7 6 6 6 6 6 6 6 6 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5
334g
5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 2 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
---------------------------------------------------
This morning.
Here's what it looked like after 9 hours.
20050616/070000.txt
32 Time Since Last Sync 000 days 09:48:05
Rx Tx
140 Current Rate 1536 384
141 Previous Rate 0 0
142 DSL Max Rate - -
143 DSL Min Rate - -
144 Current ATTN DR 1536 -
145 Current SNRM 14.0 -
146 Current LATN - -
147 Current SATN 58.0 -
148 Current TP - 0.0
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 16.5 16.5 16.5 16.0 16.5 16.0 16.5 16.0 16.0
333d
16.0 17.0 17.0 15.5 16.5 16.0 16.0 16.0 16.5 16.0 16.0 16.0 15.5 15.5 15.0 15.0
333e
0.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.5 15.0 15.0 15.0
333f
15.0 14.5 15.0 15.0 15.0 15.0 15.0 15.5 16.0 14.0 15.0 15.0 15.5 15.0 15.0 16.0
333g
15.0 15.5 15.0 15.5 14.5 15.0 15.5 15.0 15.0 14.5 14.5 14.5 15.0 15.5 15.5 14.5
333h
15.0 14.5 14.5 14.5 14.5 15.0 15.0 14.5 15.0 14.5 14.5 15.0 14.0 16.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 6 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 9 9
334d
9 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 7 7 6 6 6 6 6 6 6 6 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5
334g
5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 2 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
By 7:15, the modem showed that the noisy interferror was starting up...
32 Time Since Last Sync 000 days 10:03:02
140 Current Rate 1536 384
141 Previous Rate 0 0
142 DSL Max Rate - -
143 DSL Min Rate - -
144 Current ATTN DR 1536 -
145 Current SNRM 15.5 -
146 Current LATN - -
147 Current SATN 58.0 -
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.0 16.0 16.5 15.5 16.0 16.5 16.0 16.0 16.5 16.5
333d
16.5 18.0 18.0 17.0 17.5 17.5 17.5 17.5 18.5 18.5 18.0 18.0 17.5 17.5 17.5 17.5
333e
0.0 17.5 17.5 17.5 17.5 17.5 17.5 17.5 17.5 17.5 17.5 18.0 18.0 17.5 17.5 17.5
333f
17.0 16.5 17.0 16.5 16.0 16.0 16.0 16.0 17.0 15.5 15.5 16.0 16.0 16.0 16.0 17.0
333g
16.0 16.0 16.0 17.0 16.5 16.5 17.5 18.0 17.5 17.0 17.0 18.0 18.5 18.5 18.5 18.5
333h
18.5 19.0 18.5 19.0 19.0 19.0 19.0 19.0 19.0 18.0 18.0 18.5 17.0 18.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 6 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 9 9
334d
9 8 8 8 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 7 7 6 6 6 6 6 6 6 6 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 4 5 5 5 5 5 5 5
334g
5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 2 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I power cycled the modem to see if it would reallocate the DMT bits. Sure enough, it did!
32 Time Since Last Sync 000 days 00:00:46
Rx Tx
140 Current Rate 1536 384
141 Previous Rate 0 0
142 DSL Max Rate - -
143 DSL Min Rate - -
144 Current ATTN DR 1536 -
145 Current SNRM 16.0 -
146 Current LATN - -
147 Current SATN 58.5 -
148 Current TP - 0.0
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 17.5 17.0 17.0 17.0 17.0 17.0 17.0 17.0 17.0 17.0
333d
17.0 17.0 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.0 16.0 16.5 16.5 16.0 16.0
333e
0.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333f
16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.0 15.5 16.0 16.0 16.0 16.0 16.0 16.0
333g
16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333h
16.0 16.0 16.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 6 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 7 8 9 9 9 9 9 9 9 9
334d
9 9 9 9 9 8 8 8 8 8 8 7 7 7 7 7
334e
0 7 7 6 6 6 6 6 6 6 6 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 5 4 4 5 4 5 5 5
334g
4 4 4 4 4 4 4 4 4 4 4 4 4 4 3 3
334h
3 3 3 2 2 2 2 2 2 2 2 2 2 2 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I decided to call ASI. I had ASI change my line from 1.5/384 INTL to 1.5/384 FAST this morning while the "noise source" was occuring. The line didn't drop sync (except when I was rebooting the modem or forcing a resync), but the noisy interferror was still present. The ASI tech I talked to couldn't see any problem on the line even though the 5100b could.
In Interleaved (INTL) mode, the 5100b was able to squeeze in 474 DMT bits.
5100-20050616/081800.txt.png
SNR: 14.5
ATN: 59.5
DMT: 474 bit bins
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 16.5 14.5 17.0 17.5 17.5 17.0 17.0 17.0 16.0
333d
15.5 16.5 16.5 14.5 16.5 16.5 16.5 16.5 16.5 16.5 18.0 16.5 16.5 16.5 16.5 16.5
333e
0.0 16.0 16.0 16.5 16.5 17.5 17.0 16.0 16.0 17.5 15.5 15.0 16.0 15.0 15.0 15.5
333f
19.0 16.5 16.5 16.0 15.5 16.5 16.0 14.5 15.0 16.0 16.0 16.5 16.0 16.0 15.5 16.0
333g
16.5 16.0 15.0 15.5 15.5 15.5 16.5 16.0 16.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0
333h
15.5 15.5 15.5 15.5 16.0 16.0 15.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 16.0 16.0 16.5 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 4 4 4 5 5 5 6 6 6
334b
7 7 7 7 7 7 6 6 6 5 5 5 4 4 0 0
334c
0 0 0 0 0 0 8 9 9 9 9 9 8 9 9 9
334d
9 9 9 8 9 9 8 8 9 9 7 8 8 8 7 7
334e
0 6 6 7 6 5 6 6 5 2 5 5 2 4 5 5
334f
3 5 5 4 4 5 5 5 5 5 5 4 5 5 4 4
334g
5 5 3 5 5 5 4 4 4 4 4 4 4 3 4 3
334h
3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 0
334i
0 0 0 0 0 0 0 0 0 0 0 2 2 2 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I suspect that when it's in INTL mode, it allocates significantly more bits for error correction purposes.
5100-20050616/081900.txt
SNR: 13.5
ATN: 59.5
DMT: 476 bit bins
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 16.5 16.0 16.5 17.0 16.0 15.5 16.5 17.0 18.0
333d
17.0 16.5 16.5 16.0 16.5 16.5 16.0 15.5 16.5 16.5 17.5 17.0 16.5 16.5 16.5 16.5
333e
0.0 15.0 15.5 16.0 16.5 17.0 16.5 16.5 16.5 16.5 16.5 16.0 14.0 15.0 16.0 16.0
333f
18.5 16.0 16.0 16.5 16.5 16.5 16.0 14.0 15.5 16.5 16.0 16.5 16.5 16.0 16.5 16.5
333g
16.5 15.5 12.5 15.5 16.0 16.0 16.0 16.5 16.5 16.5 16.5 16.5 16.5 15.5 16.5 16.5
333h
16.5 16.5 17.0 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.0 16.0 16.0
333i
0.0 0.0 0.0 0.0 0.0 16.0 0.0 0.0 16.0 16.0 0.0 16.5 16.0 16.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 4 4 5 5 6 6 6 6 7
334b
7 7 7 7 7 6 6 6 5 5 5 4 4 3 0 0
334c
0 0 0 0 0 0 8 9 8 9 9 9 9 10 9 8
334d
9 9 9 7 9 9 9 9 9 8 7 7 8 8 7 7
334e
0 7 7 7 6 4 6 6 5 2 5 5 3 4 5 5
334f
3 5 5 4 3 5 5 5 5 5 5 4 5 5 4 3
334g
5 5 4 5 5 4 4 4 4 3 3 4 4 3 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2
334i
0 0 0 0 0 2 0 0 2 2 0 2 2 2 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
In FAST mode a short while later, the modem could only allocate 440 DMT bits.
5100-20050616/083200.txt
SNR: 14.5
ATN: 58.5
DMT: 440 bit bins
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.0 16.5 15.5 16.5 16.5 16.5 16.5 16.5 16.5 17.0
333d
16.5 16.0 16.0 15.5 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.5 16.0 16.0 16.0 16.0
333e
0.0 16.0 16.0 16.0 16.0 15.5 16.0 16.0 15.5 14.5 16.0 16.0 16.0 16.0 16.0 16.0
333f
16.0 16.0 16.0 15.0 14.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 15.0
333g
16.0 16.0 15.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333h
16.0 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 4 5 5 6 6 6
334b
6 6 7 7 6 6 6 6 5 5 5 4 4 4 0 0
334c
0 0 0 0 0 0 8 8 8 9 9 9 9 9 9 7
334d
9 9 9 7 9 9 8 8 8 8 7 7 7 7 7 7
334e
0 7 6 6 6 3 6 5 5 2 5 5 4 5 5 5
334f
2 5 5 4 3 5 5 5 5 5 5 3 5 4 3 3
334g
4 4 4 4 4 4 3 4 4 3 3 3 3 3 3 3
334h
3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Swapped in a 5660 at 8:33am:
Current Attainable Rate 492307 3134693
Current SNR Margin 9.0 16.0
Current Attenuation 58.0 31.5
Current Output Power 5.5 17.5
2005/06/16 8:35am: 5660 (forced resync)
Current Attainable Rate 492307 3134693
Current SNR Margin 10.0 16.0
Current Attenuation 59.0 31.5
Current Output Power 5.5 17.5
PRIVATE modem at 8:36am:
SNR 14.6 16.0
ATN 62.5 31.5
PWR 4.6 16.9
RAT 2656 1016
Forced DSL resync.
PRIVATE modem at 8:41am:
SNR 14.1 16.0
ATN 62.5 31.5
PWR 4.8 16.8
RAT 2560 1012
8:49 5100b (back to normal)
SNR 15.0
ATN 58.5
DMT 437 bit bins
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 16.5 17.0 17.0 17.0 17.0 16.5 17.0 16.5 16.5
333d
16.5 16.5 16.5 15.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 15.5 16.0 15.5
333e
0.0 15.5 15.5 15.5 16.0 15.5 15.5 15.5 16.0 16.0 15.5 16.0 16.0 16.0 16.0 15.5
333f
15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.0 15.5 15.5 15.5 15.5
333g
15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 16.5
333h
16.0 15.5 15.5 15.5 15.5 15.5 15.5 15.5 15.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 4 5 5 6 6 6
334b
6 7 6 6 7 6 6 6 5 5 5 4 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 8 9 9 9 9 9 9
334d
9 9 8 8 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 6 6 6 6 6 5 5 5 5 5 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4
334g
4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 2
334h
2 2 2 2 2 2 2 2 2 0 0 0 0 0 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
8:54
Current Attainable Rate 505263 3134693
Current SNR Margin 11.0 16.0
Current Attenuation 59.0 31.5
Current Output Power 5.5 17.5
8:59 5100b
SNR: 16.0
ATN: 58.5
DMT: 437 bit bins
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 17.0 16.5 17.0 16.5 16.5 17.0 16.5 16.5 16.5
333d
16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.0 16.5 16.0
333e
0.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.5 16.5 16.5 16.0
333f
16.0 16.5 16.5 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.0 16.5 16.0 16.0
333g
16.5 16.0 16.0 16.0 16.0 16.5 16.0 16.5 16.0 16.5 16.5 16.0 16.0 16.0 16.5 17.0
333h
16.5 16.0 16.0 16.0 16.0 16.5 16.0 16.0 16.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 5 5 5 5 6 6
334b
6 7 6 6 7 6 6 6 5 5 5 4 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 9 9
334d
9 9 9 9 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 6 6 6 6 6 6 5 5 5 5 5 5 5 5 5
334f
5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4
334g
4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 2
334h
2 2 2 2 2 2 2 2 2 0 0 0 0 0 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
The effects of the noise source disappeared when I rebooted the modem at noon. The high SNR peak values seem to indicate that it is underutilizing a particular DMT tone frequency.
Right before reboot it has some high SNR peaks:
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 12.5 13.5 15.0 14.5 15.5 17.0 20.0 16.5 17.0 21.0
333d
17.5 16.5 16.5 16.5 16.5 16.5 18.0 18.0 16.5 16.5 18.0 16.5 16.5 16.0 16.0 16.0
333e
0.0 17.0 17.0 16.0 16.5 24.0 17.0 16.5 19.0 27.5 17.5 17.0 22.5 19.5 16.0 16.0
333f
26.0 16.5 17.0 19.5 25.0 18.0 17.0 19.0 17.5 16.5 16.5 17.5 16.5 17.0 19.5 20.5
333g
16.5 16.5 22.0 17.0 16.5 16.5 17.5 16.5 16.5 17.0 17.0 16.0 16.0 17.5 16.0 16.0
333h
16.0 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 0.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 4 5 5 5 6 6
334b
6 7 7 6 7 6 6 6 5 5 5 4 4 4 0 0
334c
0 0 0 0 0 0 8 8 8 9 9 9 8 9 9 8
334d
9 9 9 9 9 9 8 8 8 8 8 8 8 7 7 7
334e
0 6 6 6 6 3 6 6 5 2 5 5 3 4 5 5
334f
2 5 5 4 2 5 5 4 5 5 5 4 5 4 4 3
334g
4 4 2 4 4 4 4 4 4 3 3 3 3 3 3 3
334h
3 3 2 2 2 2 2 2 2 2 2 2 2 0 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
After reboot the high SNR peaks are gone and the modem starts using bits it previously was not using:
5100-20050616/121600.txt
Rx Tx
140 Current Rate 1536 384
141 Previous Rate 0 0
142 DSL Max Rate - -
143 DSL Min Rate - -
144 Current ATTN DR 1536 -
145 Current SNRM 16.0 -
146 Current LATN - -
147 Current SATN 58.5 -
333 Receive SNR ps
333a
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333b
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333c
0.0 0.0 0.0 0.0 0.0 0.0 16.5 16.5 16.5 16.5 16.5 16.5 17.0 16.5 16.5 16.5
333d
16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.0 16.5
333e
0.0 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0
333f
16.0 16.0 16.5 16.0 16.5 16.5 16.0 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.5
333g
16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.5 16.5 16.5
333h
16.0 16.0 16.0 16.5 16.0 16.5 16.0 16.5 16.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333i
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333j
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333k
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333l
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333m
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333n
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333o
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
333p
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
334 ADSL DMT Bin Bits
334a
0 0 0 0 0 0 0 3 4 4 4 5 5 6 6 6
334b
6 6 7 7 6 6 6 6 5 5 5 4 4 4 0 0
334c
0 0 0 0 0 0 7 8 8 9 9 9 9 9 9 9
334d
9 9 9 8 8 8 8 8 8 8 8 7 7 7 7 7
334e
0 6 6 6 6 6 5 5 5 5 5 5 5 5 5 5
334f
5 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4
334g
4 4 4 4 4 4 4 3 3 3 3 3 3 2 2 2
334h
2 2 2 2 2 2 2 2 2 0 0 0 0 0 0 0
334i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334j
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334k
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334l
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334m
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334n
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334o
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
334p
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
If I have some time later, I'll post the graphical versions of the data.
--justbits |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
1 edit | Just wanted to add that I isolated the DSL modem on a UPS the other morning and yanked the wall socket while the noisy interferror was occuring. Isolating the DSL modem to a UPS for 25 minutes didn't make the noisy interferror go away.
--justbits |
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telcotech
join:2002-02-02
at&t
| reply to justbits
Looks like you have an AC motor on a timer somewhere. Even if you isolate the modems power supply, the homerun from the NID could pick up RFI.
Most of the common causes would be an electric motor or an electric heater of some type, an electric water heater, spa/hot tub, pool pump, etc... since it seems to be consistent, it would suggest that it is something on a timer or something that gets used at a specific time each day.
Do you live in an apartment building? if so, it could be a neighbor.
Try this:
1. disconnect your IW from the nid, only connect the homerun to the DSL modem when the problem starts.
2. Take the spare pairs in the IW running to the modem connect them together and ground them.
3. Check your electrical outlets, the ground should not be connected to the service neutral, it should be grounded to the house electrical ground, some older homes get upgraded and the electricians would tie the service neutral to the ground tab at the outlets to pass an inspection, this can create a differential that can act as an antenna and bring noise into your house through your electrical system. Isolating the modem with a UPS would not filter this noise out. the computer, monitor, modem router and any other device that used AC power would need to be connected to the same UPS and the UPS would need to be run on backup battery power to actually isolate this type of interference.
4. If telco comes out again, have them check the bonding on the drop, it should be grounded at the NID or the PED or both. |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
1 edit | I am in a home in a residential neighborhood just off of a main street. That main street has a straight south run to the River Grove central office. I am for all intents and purposes almost exactly directly north (as the crow flies) from the central office. (within 300 feet I think)
I'll try grounding the extra wires. Should I ground it to the house grounded outlet or to a the pipe that holds the electric wires that runs into the house on the outside of the house? Or some other suggestion? I know there are a few outlets that have the grounded prong (circular) part of the plug that grounds by attaching to a screw in the outlet box.
I've never had a problem with this for years. Why the heck would the house electrical wiring suddenly start picking up that much RFI?
As part of my electrical isolation experiment a few weeks ago, I unplugged everything in my house, except for a few essentials. (Refrigerators, DSL modem, router, computer.) Turned off ceiling fans. Turned off all electrical lights. Turned off all Wireless devices. (Answering machine, phones, etc. Disconnected the telephone also. The problem still occurred in full force.
I'll check the house's electrical outlet grounding, but I really doubt that there's anything I can do within my premesis to fix this problem. I hadn't changed any wiring (electrical or telephone or for that matter anything else) in the house when the problem started occuring. If my wiring is picking up RFI, it's gotta be a pretty strong noisy signal that's being generated somewhere near my wire group/count.
The thing is, when the problem is occurring, the ASI on-site techs could see the problem on the line. The problem is that the most recent ASI on-site tech came on Saturday morning and observed the line when the problem wasn't occuring, so they closed my trouble ticket. :-P There is a very low occurance rate for Saturdays. I left a nice note inside the NID explaining the problem in detail but they left without seeing what I saw. Go figure.
I can hear audible noise on the line in the evening and during the morning. I'll try to take a recording this morning while the problem is happening. I heard the same thing without any DSL modem hooked up. I heard the same thing with and without a DSL microfilter installed.
By the way, my father worked for AT&T and then Lucent for many years. He worked in the River Grove CO many times. He pointed out the CO building to me the other day.
This is the URL given:
»www.mapquest.com/maps/map.adp?la···7&zoom=8
at: »/coinfo
for: 773-625-xxxx (RVGVILRG).
That URL can be seen on Google as:
»maps.google.com/maps?ll=41.92835···=k&hl=en
That URL is wrong! It's not pointing at the correct building.
This URL is right: (it's the
»maps.google.com/maps?ll=41.92913···=k&hl=en
OR:
»www.mapquest.com/maps/map.adp?la···9&zoom=8
Where should I post to get the CO data on broadbandreports.com updated?
--justbits |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
3 edits | reply to armyrebel4
This is just subjective, til I can provide recordings, but I believe I can hear noise at any time of day.
But, during the problem, the noise goes from being constant to getting louder and quieter every 30+ seconds, I think.
It's hard to keep your thoughts when you're punching digits on the phone trying to keep the line clear of dial tone or "cannot complete your call as dialed" messages.
I have some recordings, but I don't have time to clean them up or isolate the noise I'm hearing today.
I don't hear other people in the background. I didn't place any calls. I was just lifting the receiver and dialing 1-2-3-4-5-6-7 about 3 seconds apart.
I have a CAT 5 cable running from the NID into the telephone during the tests. If I were to do this test outside, the airplanes from O'Hare airport flying overhead would drown out any noise I might be able to hear myself.
telcotech: I didn't get a chance to ground the extra CAT 5 wires yet. I'll rewire the cable tonight.
By the way, here's a movie of what happened this morning.
Before 8am and after 9am, the signal looks basicly exactly the same. Around 7am, I can see a ramp-up period where the lowest download bit bins start lowering in SNR. This happens every day before the problem occurs. Sometimes, the SNR lowers, then it starts going way high and then the SNR graph goes jagged.
The DSL modem was not on all night. I still heard line noise this morning.
From 7am til 8am I was goofing around with the cables and doing recordings of just the POTS side of the world. The data from 7am til 8am will probably not be much use. The 8-9 data is kinda interesting and shows the noise I had before still exists.
Just to reitterate, the line is "clean" and produces a nice stairstep/plateau graph except for every weekday morning between 7-10am for a 30-45 minute interval.
 51002005061708.zip 789871 bytes
(51002005061708.mov)
--justbits
Edited for clarity of the last two sentences.
Added that it occurs for 30-45 minutes each time. |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| Just a random comment... I'm pretty sure my wires run under or over train tracks. Take a look at the CO and you can see that just north of Grand Ave is a set of train tracks.
»maps.google.com/maps?ll=41.92913···=k&hl=en
Is it possible that a diesel locomotive (that uses electric motors) is idling near enough to the wire group/count/bundle and that it could be causing excessive noise at a particular repeating schedule each day? What schedule do freight train opperators usually follow?
It seems plausible that if the train operator or idling procedure changed recently, they could be idling at a different spot since Friday last week.
--justbits |
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armyrebel4
Dream Chaser
Premium
join:2002-01-08
Springfield, IL
·AT&T Midwest
1 edit | reply to justbits
Re: Any 5100b technician page DMT/SNR data experts?
Call 18006114466 ask them to run a test on your line. Explain to them exactly what you are having problems with.
When the telco tech comes out he will hook up a linemans headphone set to your nid, a high pitched noise will come from his headset showing you have dsl. He will then dial a number, it will repeat your phone number. Any noise on the line will be heard by him, you do not have to be home for this to happen. Tell repair what is happening and they will isolate it the best they can.
If this does not work, there are other service providers out there that use dry line dsl. But I will stress, these techs in the forum know what they are talking about. The last poster is a retired phone technician. RadioDoc deals with radio broadcasting equipment. Lev is the obudsman of the forum, and everyone else is students always willing to learn  . That's why it's called the funhouse. |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| reply to telcotech
Re: Any 5100b technician page DMT/SNR data experts
This morning, I did some wire checking and rewiring.
The NID has two CAT 5 cables wires running from it.
A "home run". The CAT 5 blue pairs connect to TELCO. All 3 other pairs are screwed into to NID ground which is connected to the electrical pipe ground on the back of the house.
The "POTS run". In the NID, the IW port is connected to a Z330 microfilter via a short 6 inch CAT 5 cable. The POTS side of the microfilter goes into a 8 foot CAT 5 cable. That CAT 5 cable goes into one wireless answering machine.
Inside the house, the grounded 3 pairs of wire connect to the ground on the power strip. This is done by taking the 3 pairs of wire and twisting them with another wall grade electrical wire. That wire connects via screw into a power strip ground prong. The power strip connects into a second power strip, which connects into UPS1. UPS1 is plugged into a grounded outlet. The powerstrip, UPS1 and NID all are on the same ground now. They all were before too, but I suppose it's arguably better.
From here on, nothing has changed, but I thought I'd describe it.
All outlets in the house that have grounded outlets have the ground wire screwed into the wall box. All devices are plugged into correctly grounded UPSes.
One pseudo grounded outlet screws the ground onto the electrical box outside plate. The plate is metal. The screw goes into a threaded hole that is provided by the electrical box.
I traced all ground wires to pipes and all pipes run to the house main electrical pipe inlet.
The back bedroom UPS1 is connected to a 10/100 BT switch, a Linksys router (wireless disabled), the DSL modem and a wireless answering machine. (Disconnecting and powering off the answering machine and all POTS connections has not caused the problem to go away in the past.)
The switch connects to a red Belkin 50 foot CAT 5e cable.
The red Belkin 50 foot CAT 5e cable connects to Switch 2. Switch 2 is powered by a second UPS.
UPS2 connects to computer 1 that also connects to the switch.
Switch 2 connects via CAT 5e cable to Switch 3.
Switch 2 connects via CAT 5 cable to a home media device on UPS3.
UPS3 has a TV antenna lightning strike protector on it. (I've disconnected this and seen no change in the problem while it was occurring.)
Switch 2 connects via green Belkin 50 foot CAT 5e to computer 2.
UPS3 connects to computer 2.
--justbits |
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armyrebel4
Dream Chaser
Premium
join:2002-01-08
Springfield, IL
·AT&T Midwest
| reply to justbits
Re: Any 5100b technician page DMT/SNR data experts?
alright, I've done as much as I can with this. I would follow up with beach boy or post in the sbc direct forum. Obvisously its interfearance coming from somewhere and you've done your best as far as what I can see. Anyone else have input on this one?
Erik
--
“True individual freedom cannot exist without economic security and independence. People who are hungry and out of a job are the stuff of which dictatorships are made.”- FDR |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| I opened this discussion to get feedback on the 5100b technician data and to get some troubleshooting ideas outside of SBC Direct and SBC ASI. I am very thankful for everybody's suggestions. One of these days, I'll consider writing some software to make monitoring the 5100b accessible to more people than just myself.
I have an extensive thread going in SBC Direct. It's been open since 5/10/2005. Unless you're privleged to read all posts in SBC Direct, don't bother going to this URL:
»[TROUBLE] Speed drop from 2400/443 to 1500/443
beach boy and crew have a CO port change scheduled for my line. I'm assuming for the DSLAM. In the meantime, I'm using dialup.
--justbits |
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Ainshi
join:2002-07-09
Woodstock, IL | reply to justbits
Re: Any 5100b technician page DMT/SNR data experts
Just as the sound from jet engines interferes with the alien morphing devices on Stargate SG-1, so too may your phone lines be affected! |
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AlEinstein
join:2004-10-08
Hughson, CA
| reply to justbits
Port change is a good idea. I'm still seeing a flucuating noise margin though. Bad ports usually throw errors and less frequently attribute flucuating noise.
I'm not into beating dead horses, or any state of a horse for that matter, but how about a new protector for sure and then a possible pair change after the port change??? Seems like not much effort in the interest of being thorough.
Einstein, OUT
Keeps us posted.
Bits, God bless ya, but you're darn close to making this into rocket science! Love those data report posts! I think my scroll bar is about worn out.
Take care, good luck |
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chris123
join:2002-07-23
Highland, IN
| reply to justbits
Have you tried changing out your filter, or installing a proper whole house splitter? Check the for sale forum if you need to buy one.
I'm just shooting in the dark here, but I've heard other people say they go bad at times.
--
see my SBC Review @ »Review of AT&T Midwest by chris123 |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| I have tried swapping microfilters. I've had the microfilter located in the NID and inside my house. Since I've gone crazy trying to eliminate potential sources of interference, all I have is one wireless telephone hooked up to one microfilter. A whole house microfilter wont make any difference in this case.
--justbits |
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joewho
Premium
join:2004-08-20
Las Vegas, NV | Maybe there's a wasp nest in the box on the pole... |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| It is extremely unlikely that an animal or insect would cause radio frequency interference that repeats for a pretty particular duration (45 minutes) during the week and at different times on weekends and holidays.
The more likely candidates we're exploring right now are improperly filtered coaxial cable TV cables on the utility pole, the neighbor who had the improperly installed satellite TV hookup, or possibly some AC/DC motor, like a hot tub, a spa, or a excercise machine that's placed too close to telephone wires. (All of these candidates are not present within my home.)
Just thinking about it... if the person who attached their dish to the utility pole wasn't smart enough to properly install their satellite dish, it's also likely that they also do not have proper cables or filters attached to that device to prevent them from causing excessive RF interference.
--justbits |
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misskaz
@chcgil.ameritech
| reply to justbits
I unfortunately can't offer any help, but I feel deja vu reading your posts. We have had very similar problems with our SBC DSL for months now. (We live in Chicago, too.)
Lately, we've been losing our DSL connection on a very regular basis - close to once a day at this point. It used to be once every few months, and has been happening more and more often. Every time we lose the connection, I have to reset and set up our router all over again or I can't connect to the internet wirelessly with the laptop. It's incredibly frustrating, to come home from work and need to get stuff done only to find that the internet's out AGAIN and you have to unplug things and plug them back in and re-do all the router settings.... argh! Today even that didn't work - connecting the modem directly to the computer gave me a "limited or no connectivity" warning about the connection.
We are also faced with a lot of noise on the voice line, although it's cleared up somewhat since my boyfriend found and cleared out a really dense spider web/nest from our network interface box.
I can't say we've done anywhere near the techy troubleshooting that you have (can I do that data capture with my SpeedStream 5360?) but yet another call to Tier 1 tech support at SBC this evening has introduced me to the possibility of interference causing the problem. Previously we thought it was just the ancient lines in this apartment building - and it may well be that's the case after all.
Honestly, I'm really close to cancelling SBC altogether, phone and internet, and getting a cable modem and VoIP. Oh yeah, have I mentioned that even though I've paid for their "line-backer" service for 3 years, which is supposed to cover tech visits even if the problem is the lines inside the house, SBC won't come out because they claim it's my landlord's responsibility. Funny how they didn't mention that when they asked if I wanted to pay an extra $5 a month for the service.
Anyway, good luck and I'll be following your threads to see if you get anywhere. |
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armyrebel4
Dream Chaser
Premium
join:2002-01-08
Springfield, IL
·AT&T Midwest
| reply to justbits
"For the purpose of constructing and maintaining such lines of telegraph or telephone, the parties in interest may set the necessary poles or posts on which to place the wires and insulators of such lines, in any of the public streets, highways or alleys, or in any private road leading to such highways, streets or alleys outside of the incorporated cities, villages or towns in this state along which such lines may pass: Provided, such poles or posts shall be placed along the boundaries of such highways, streets, or alleys, at such distances therefrom as the authorities having control thereof may direct. And provided further, that the wires necessary for such lines shall not be less than fifteen feet above the ground along such boundaries, and not less than twenty feet at any public or private crossing, and shall be so placed as not in any manner to interfere with such crossing.
Any person who shall unlawfully and intentionally injure, molest, or destroy any of said lines or the material or property belonging thereto, or shall in any manner interfere with the proper working of such lines, shall on conviction thereof, be deemed guilty of a petty offense and fined not exceeding $100. The fine shall be recoverable in the circuit court; Provided, that prosecution under the foregoing provision of this section shall not in any manner prevent a recovery by the person or persons entitled thereto, of the amount of damages done to such lines."
That's state law. Unless there is some kind of radiation leak lol, get cable man it's not worth the hassle.
--
“True individual freedom cannot exist without economic security and independence. People who are hungry and out of a job are the stuff of which dictatorships are made.”- FDR |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
·AT&T Midwest
| reply to misskaz
The SpeedStream 5360 provides absolutely no data to the customer. If it does, it's very undocumented.
A 5660 or a 5100b would be better. If you recently upgraded your service, you could call back and ask to see if they can get you a new 5100b modem for just shipping. ($6-$9 or so)
What area of Chicago are you in? If you're within 3 miles of River Grove, that would be very interesting and possibly related. If you're close to Cumberland & Montrose, that's an even higher possibility of being the same problem!
Which CO does your telephone number come out of?
Go to »/coinfo
Put in the area code & exchange of your telephone number.
If the results are "RVGVILRG", bingo, your central office is the same office as mine.
RVGVILRG serves:
708-452 708-453 708-456 708-583 708-695
847-288 847-451 847-455 847-260 773-625
773-658 773-589
My neighborhood is 773-625 and 708-456.
My next door neighbor's been complaining that for the last few months, they've been hearing static pops and cross talk (other people talking) while she's been on the phone during the day. I told her to start logging when the problems occur to see if they coorelate with my problem.
You might go back in your Network Interface box and loosen and re-tighten some of the wires. Sometimes they come loose, sometimes, they are overtightened.
The biggest pain in the butt that you'll have to go through is bending over backwards to prove the problem is not your inside wiring. The easiest way to do this is to hook the DSL modem directly into a microfilter at the NID and only hook up one phone. If you have a wireless router that reaches your apartment, that'd be good. If you can show the problem exists, even at the NID with a minimum amount of wires, then it's not your inside wiring.
When you hook up wires, do not use any flat telephone cords. Use round cords. Yes, some of the microfilters have flat cords... that's ok, because they're usually 4 inches long. If you have any CAT 3 or better cable and a crimping tool, make your own short run of wire. That would be the most ideal.
As for linebacker, you should talk to the POTS repair service, not the DSL Tier 1 problem phone number.
Make sure you don't have any television cables or power cables running near your telephone cables too, if possible.
--justbits |
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Old_Grouch
Don't just sit there silly DO something
Premium
join:2004-05-26
Greenwood, IN
clubs:
·AT&T Midwest
| reply to justbits
Re: Any 5100b technician page DMT/SNR data experts?
justbits
Never, ever in my life has anyone accused me of having patience like yours. I'm impressed.
No technician qualities here - - but something sticks in my mind from the reading. On page one, Riss noted that the charts seem to have a distinct sine wave pattern to them and there was discussion that that pattern could be caused by a number of things - including - T1's. And, your line runs in a bundle/group/whatever with about 9 T1's.
If you keep 3X5 cards with crazy ideas, make one out for me:
- can T1's cause a sine wave noise pattern like you have captured?
- how many of the 9 T1's that you are partnered with run to businesses that are likely retail with 24 hour/day operations and point of sale terminals that upload sales/download prices/upload inventory data?
I keep looking at the possibility and the times and can almost see a 7X24 business that has a home/regional office that queries for sales each morning while providing ordering info; and does inventory/pricing each afternoon five days a week with some (limited) spill-over to the weekend. If you've got one of those on the other end of one of the 9 T1's and they have recently added or swapped a point of sale terminal.....
I've never been any good at guessing the date a baby will be born but for other things - -
hope my post isn't too distracting. GOOD LUCK
--
Keep your eyes open for my pills...I MUST have my meds. |
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