James G. Sack (jim) wrote:
> Karl Cunningham wrote:
>> The connection drops for a few seconds, perhaps 15 times per day, and a
>> few 30-second dropouts per day. Not long enough to drop an ssh
>> connection but long enough to be aggravating...
> 
> That sounds mildly disappointing. Are you estimating the daily rate from
> your observations, or have you actually observed those numbers (and
> total daily events might be even worse?)? The 30s events sound _at
> least_ aggravating!
> 
>> ..  About once per month it
>> drops altogether and I have to cycle power on the modem to get it back.
> 
> I wonder what causes those dropouts? Suppose that's inherent DSL
> behavior? --bad lines? --scheduled line/equipment work?
> 
> Maybe there's a market for simple recording line monitors that fussy DSL
> customers can buy, eh?
> 
>> One thing I haven't done yet is to have them set up reverse DNS for any
>> of the IPs. They said it's $25 per change, which sounds a bit steep.
> 
> Where's Consumers Union, when you need them? :-(

I wrote a perl script to ping from home to an IP at work, and log
missing replies. I had the same script running from work to an unrelated
IP elsewhere to be sure it wasn't a dropout there. I noticed the sync
light going out on the modem once in a while, and could correlate that
with the logs.

I imagine it is noise on the line that causes it. It doesn't seem to
correlate with phone usage or ringing. dslextreme sent filters to put on
each phone but instead of using them I bought one that mounts where the
drop enters the house. One cable goes from there directly to the modem
and another to the phones. Putting it on helped speed too, I suppose
because it isolated old wiring in the house from the DSL signal.

BTW, dslextreme had me use speedtest.net for speed tests, saying it was
the most reliable.

Karl

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