Modemsite's Forum56 - The Modem Board
Main | profile | register | search | help | Ad-free Login
Forums | USR | Tried 3 USR modems, same problem - link naks    Watch  
Author Topic
Tl Posts:

Posted - 5/14/2001 4:10:04 PM  Show Profile  Email Poster  Edit Message
I've tried the USR Performance Pro, took that back, got an USR ISA modem (accidentaly) but tried it anyway and then took that back and got a USR External (005686-03). All 3 of these modems are giving me the same problem, based on the diagnostic screens it seems to be link naks. Blers, retrains and speed shifting only become a problem at higher speeds ~49k (it won't connect any higher that this, but sometimes will end at 50k with a 52k v90 peak speed). Lower speeds don't have the blers or retrains, but still have the link naks. And I don't have these problems with non-USR modems (Actiontec call waiting, Diamond Supraexpress).

Keep in mind I've tried all of these things:
Unplugging all other phones (can't find a demarc box here)
Different computers (PCI/Ext on one, ISA on other)
Different phone jacks
Different speeds
Different connnection protocols (v34,v90)
Locking speed (with same &U and &N values, prevents speed shifts, but doesn't alleviate other problems)
Flashing when available (Ext has been upgraded to v92)

Also, there is only one ISP I can use, and they only have one local number, I'm not sure what their hardware is but it is based on K56Flex/V90. And it looks like I'll probably be stuck with a USR modem of some type, I can't find any non-USR hardware modems around here.

I'm probably going to try bringing this Ext modem to a friends to test it out at some point, just haven't got around to it.

So, what is a link nak, and what can I do about it.


Tl Posts:

Posted - 5/14/2001 7:45:00 PM  Show Profile  Email Poster  Edit Message  SARGEs Homepage
Tl Posts:

Posted - 5/16/2001 9:38:48 PM  Show Profile  Email Poster  Edit Message
"Link Naks: Negative acknowledgments (one or more blocks) - the remote modem didn't acknowledge receipt of your data. Zero is a good number here"

So my ISP's modem isn't getting all my data, what can I do about it?

Tl Posts:

Posted - 5/23/2001 9:38:22 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Normal to have some with USR modem; you may never eliminate 100% of them; other chipsets do not use Link NAKs in diagnostics; concentrate on throughput -
lower connect speed may result in better throughput.


Click Here To Close Thread, Administrators & Moderators Only.

Show All Forums |