Post by sms
I'm having continuous dropouts on my Sonic.net DSL. I replaced the
whole house splitter. I have tried four different ADSL modems. I now
have the modem connected directly to the AT&T's junction box outside,
with a new twisted pair cord with RJ11 plugs on both ends, to totally
eliminate the house wiring from the equation.
It has to be an issue somewhere between the modem and Sonic, either the
AT&T wiring or Sonic's D-SLAM, but their tech support says that their
testing shows no wiring problems so they won't send AT&T out. They will
come out but there's nothing they can really do since it's not the house
wiring, it's not the modem (unless four different ADSL modems are all
bad), it's not the short twisted-pair cord between the modem and AT&T's
junction box, and (according them) it's not the AT&T wiring.
Anyone have any ideas of what I can try, or what I can say to them?
While I despise AT&T, I'm thinking of getting U-Verse plus an Ooma box
for voice. Then I'll have to pay for VPN service separately, but so it goes.
First check for a rusty looking terminal block where your wires come in.
That's an old surge suppressor that needs to be replaced by AT&T. It's
their responsibility to do so.
Try hooking up a phone through a DSL filter. Leave it off the hook
until the beeping stops (it's not loud on Sonic). Now see if you still
get carrier dropouts. If you do, listen for crackling on the phone.
If the dropouts stop or you hear crackling, there's a loose wire and
AT&T will never fix it. I'm not saying it's the right thing to do, but
an extremely high dv/dt power surge, like a small capacitor charged to
10KV and touched to the wires, fixes it ;) Your other option is to
cancel your service or sweet-talk a service tech into swapping your
If the line is clear but dropouts continue, check the SNR (Signal to
Noise Ratio) margin on the modem's diagnostics page. That's how much
extra signal you have before data is lost. You need enough to cover
normal fluctuations in line quality so that you don't loose too much
signal. It should average at least 3dB on clean lines, 6dB on normal
lines, or even over 10dB on dirty lines. The target SNR is configurable
and it's possible for mistakes to be made during account activation.