rolande
Certifiable
Premium,Mod
join:2002-05-24
Powell, OH
clubs:
Host:
Linksys
AT&T Midwest
| reply to d_l
Re: SN Margin
My SN margin for downstream is always bouncing up and down. Not a significant amount but over time it can vary by several dB. I am using a Cisco WIC-1ADSL module and I have custom MRTG script that grabs the line data for monitoring. For a long time I have averaged right at 17.5dB. Monday morning my SN margin went to -11.0 dB and of course my connection lost synch. So I went down to my equipment rack and noticed that my old POTS CAT5 patch cord that I was previously using to connect to an FXO port on my router was laying across the separate patch I use for my DSL signal. I pulled that cable so it was isolated from my DSL patch and *wham* my SN margin jumped to 20.0dB. It has never been above 18dB in the 2 and a half years I have lived here. I assume we must be getting a decent amount of AM ground noise that the POTS line is picking up. 
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d_l
Barsoom
Premium,MVM
join:2002-12-08
Reno, NV
| There is always the possibility that the OP's line has deteriorated or some in-residence, line noise source has started up. Those are the bad things that could have happened. I tried to start out checking for the good things (quieter line, lower power used) that might have occurred.  |
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