snafur
join:2004-11-05
| reply to tonydi
Re: [Line Problem] random sync loss several times a day
OK. I've removed all other equipment on the line including the filters so only the modem is plugged in. The CRC errors have jumped to 553 - 1 so I'll power cycle the modem now, too. I'll come back later and let you know how stable things are like this. Thanks for your help. |
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snafur
join:2004-11-05
| Well, that didn't last long. I power cycled the modem and it has taken about 15 minutes to get sync back. Here is the Stats page from the brief moment it was Up during that time:
Line State UP
Modulation G.dmt
Data Path fast
To Modem To Internet
Max Allowed Speed (kbps) 32 384
SN Margin (dB) 2147483647.0 -
Line Attenuation (dB) 60.5 -
Loss of Signal 0 -
Loss of Frame 0 0
CRC Errors 260 6
Now it's back to:
Line State UP
Modulation G.dmt
Data Path fast
To Modem To Internet
Max Allowed Speed (kbps) 1536 384
SN Margin (dB) 13.5 -
Line Attenuation (dB) 53.5 -
Loss of Signal 0 -
Loss of Frame 0 0
CRC Errors 12 2
I'm looking now for a 50 foot cable to run to the NID. Will that length be a problem? |
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snafur
join:2004-11-05
| Sorry if I'm posting too much info, but I did the test at the NID, and line stats aren't much different:
Line State UP
Modulation G.dmt
Data Path fast
To Modem To Internet
Max Allowed Speed (kbps) 1536 384
SN Margin (dB) 14.0 -
Line Attenuation (dB) 52.5 -
Loss of Signal 0 -
Loss of Frame 0 0
CRC Errors 2 2 |
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snafur
join:2004-11-05
| Thanks d_l. I read your response in another thread about the SN margin, too. In the meantime, I tested at the NID and all seemed OK. I could not do an extended test but the link has been stable since then. (I have connected my POTS equipment again, too, with all the filters.)
I have updated the modem software to 1.0.0.53, but when I try to use the DMT tool, all I get is a blank graph and limited data:
Downstream Maxrate (Estimated): 1536
Upstream Maxrate (Estimated): 384
Bit tones with notches/missing bits:
bit(s) 1:63 4.3125 - 276 KHz
bit(s) 65:255 280.3125 - 1104 KHz
Could this be because I'm on a Mac? I followed the instructions for saving the Tech Readout as html.
Thanks for your help. |
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