RE: (PM) Can't limit USR modem

Richard Gamberg (bbhi@shaka.com)
Thu, 25 Feb 1999 11:30:47 -1000

3Com changed the values for &u&n w/ the v90 firmware release.
If the modem has x2 firmware (not v90), the values are different.
Both tables are listed on my "Limiting Your Connect Speed" page at
http://808hi.com/56k/x2-linklimit.htm

Aloha,
Richard Gamberg
http://808hi.com/56k/ 56k=v.Unreliable

-> -----Original Message-----
-> From: owner-portmaster-users@livingston.com
-> [mailto:owner-portmaster-users@livingston.com]On Behalf Of Craig Baird
-> Sent: Thursday, February 25, 1999 10:12 AM
-> To: portmaster-users@livingston.com
-> Subject: (PM) Can't limit USR modem
->
->
-> Some of you may remember a few weeks back, I had a USR V.90 modem that
-> wouldn't take the &Nn init string to limit it's connect speed. Well
-> I've got another one now. This one's an external USR 56k voice faxmodem
-> pro (the one that's USB capable, although I'm just using it with the
-> standard RS-232 port). It's model # 00560500. It has the same
-> problem! I can put &Nn in Extra Settings to my heart's content, and it
-> never affects anything. I've been trying &N28, which should limit it to
-> 42666, but it keeps connecting at either 49,333 or 45,333 with
-> mega-retrains/renegs/disconnects. I also tried connecting with
-> Hyperterminal. I did a:
->
-> AT&F1&N28
-> ATDT<phone number>
->
-> with the same result--connect at 49,333. I can lock it at V.34, but I'd
-> rather lock it to a higher rate if possible.
->
-> Since this modem had 5.98 firmware, I thought that this might be the
-> problem, so I found an 11/98 firmware update (ver. 4.9.2, I think), and
-> flashed the modem. Same problem, though. It just seems to ignore the
-> &N28. The only solution I've found is to lock it to V.34. Heck, I've
-> even tried the "+MS=..." inits a la Rockwell (of course, they didn't
-> work). Does anyone know what the deal is here? Did USR just leave out
-> the speed limiting features on certain firmware revs, or is there
-> another string besides &Nn that will accomplish this?
->
-> Thanks
->
-> Craig
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