Modem issues - maybe firmware/maybe not?

Discussion in 'Tomato Firmware' started by nozmoking, Mar 3, 2009.

  1. nozmoking

    nozmoking LI Guru Member

    I'm grasping at straws maybe but lately I've been having connection issues with Tomato 1.22 on a WRT54GL with various modems. I'm really not sure Tomato has anything to do with it but I'm very much open for suggestions.

    I have three ADSL modems that I've used over the past few years and my favorite happens to be an ancient Westell B90-36R blind bridge modem. I also have an Earthlink'd Netopia 3314 UHP and a ZyXel P-600 series, also with E-Link firmware.

    I bring all this up because a while ago the Westell seemed to give up - it would sync but would not connect. I chalked it up to its age and switched to the Netopia in bridge mode; it's always been less likely to drop sync than the ZyXel, which has been notorious for losing sync for no good reason.

    Within the last day however the Netopia, although quick to grab DSL sync simply would not authenticate or connect. I haggled with Earthlink, they ran a TDR open line with no problem and blamed the modem or the wall jack (it's a single jack, no phones or filters attached with cat5 straight to the mpoe). I bit the bullet and switched to the ZyXel but of course it just like always drops sync periodically and then requires a hard bounce to recover - really annoying.

    To make a long story even longer I did a factory reset on the Netopia that refused to connect no matter what and it grabbed a pppoe connection right away on its own - rock solid for hours. Take it back to bridge mode and it's flat dead. As I said the line at least at initial testing looks good so the only other variable is the router and its firmware. If anyone has fought this sort of fight I'd really appreciate any input. I'd also be interested in finding out what modem has been the fastest and most stable as an ADSL bridge.

    If you've stuck with the post this far it is greatly appreciated.

  2. pfoomer

    pfoomer LI Guru Member

    modem problem


    Apart from the obvious, has anything been changed, then when I had problems with ADSL, my first check was on the signal to noise and attenuation figures.

    These are usually obtained via the status pages on the modem.

    Figures are dependent upon distance from the exchange , however, from my experience if the signal to noise level drops below 10db, you are going to get bad throughput and disconnects.

    In my case it was the line (big clue, never got a clear phone line), which the telco fixed, and now all is good.

    Another possibility is interference, I believe some halagon lamps/cookers can cause problems.

    Good Luck
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