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[stuker]

ok thanks both....ill keep plugging away with the mails as i have an open ticket already and if i don't get anywhere ill try the telephone route.

[broadstairs]

This morning I had a chance to phone ZyXEL about my findings with telnet, SSH and Web interface etc. I did not get a whole lot out of the level 1 guy I spoke with (trying to understand his very thick foreign accent), however he did promise to pass my comments up the line and ask them to get back to me on what they thought as to how SSH resets the telnet issue. I explained that at present I saw no point in RMAing the router as I believe this is a f/w bug. I did also mention it would be good if they allowed at least two telnet sessions.

I await a response....

Stuart

[broadstairs]

I had another lock out on telnet and the web UI but this time SSH did not clear it. For now I've turned off logging in case that makes a difference, never been able to find anything useful in the log yet!

Stuart

[jizzerman]

Since flipping from a HG612 with Asus DSL-AC68U as a router to a VMG8924-B10a I get a steady increase of FEC from very low after a power off reboot, then every 7 hours or so it goes up by a few hundred thousand. Today it's running at 4.5million. I did not get this with the HG612.

I bought it hoping the newer Broadcom chipset would help get me out interleaving, or at least wake up my DSLAM into putting G.INP back on my connection instead of oldskool interleaving.

Any one else had this FEC(ing) problem? I'm about to downgrade the firmware to 8C0, see if that helps. Else maybe it's faulty?

Mike

[kitz]

I had another lock out on telnet and the web UI but this time SSH did not clear it. For now I've turned off logging in case that makes a difference, never been able to find anything useful in the log yet!

Stuart

I had one yesterday but using an older version.   Because Im hardly here atm I dont have any time to investigate but at first glance it looked like a dup HG612modem stats stuck .exe,  which then caused dslstats to error,  may have triggered the lock-out.    If BE1 is reading this, sorry atm I'm really not around to do any testing but I am beginning to suspect that the use of monitoring progs may be triggering lockouts

[broadstairs]

Since I turned off all logging I have now been running for 19 days with no telnet or gui failures. I wonder if this router may not have enough memory to run logging and everything else. I bet now I've said that it will happen   

Stuart

[PhilipD]

Hi

I expect it is some form of memory leak, the more features you turn off the more free memory is free at the start and the longer before the issue manifests itself perhaps?

I'm on the 11b2 firmware now, and I've been playing about a lot with QoS and other settings.  Usually after a lot of playing about in the Web GUI the UI has ended up crashing followed by a reboot shortly afterwards but on 11b2 it's been solid.  Fingers crossed, I expect the next time I go into the WebUI it will crash now 

Regards

Phil
 

[broadstairs]

I'm still on 10C0 so I may update mine in a few days time.

Stuart

[GigabitEthernet]

This looks interesting

[PhilipD]

Hi

Just wanted to make mention that the ZyXEL has an RF filter in it which I've not seen in other devices before, which might explain my slightly on average 0.5 to 1db extra margin.  The filter is a UT34297B by UMEC.  Might be an advantage on extra noisy or long lines. 

Regards

Phil

[clonc]

How did you discover it?

[PhilipD]

Hi

Its visible here http://tjworld.net/wiki/Zyxel/VDSL_IAD on the internal pic bottom left just above the two red capacitors.

Regards

Phil

[clonc]

Thanks for info

[PhilipD]

Hi

I've not seen an internal filter before on a modem, the good thing about it is that it is as close as you can get before the ADSL/VDSL is processed by modem, so any noise picked up very locally on the telephone wire used to plug it in should get rejected, although for best results a twisted pair telephone wire should be used rather than flat oval type.

Data sheet

I would suspect if people are finding the ZyXEL is a good performer on their line that it is possibly down to this extra filter.

Regards

Phil

[les-70]

That looks like the spec of vdsl killer. I wonder if that is the correct part number.  Most modems have transformer on the input stage, it might be one of those?