Date: Mon, 5 Feb 2007 22:35:24 -0500 From: John Nielsen <lists@jnielsen.net> To: freebsd-mobile@freebsd.org Cc: Volker <volker@vwsoft.com> Subject: Re: Verizon V620 wireless card Message-ID: <200702052235.24916.lists@jnielsen.net> In-Reply-To: <45C7B643.2030904@vwsoft.com> References: <45C7B643.2030904@vwsoft.com>
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On Monday 05 February 2007 17:57, Volker wrote: > > ucom0: Novatel Wireless Inc. Novatel Wireless Merlin CDMA, rev > > 1.10/0.00, addr 2 > > ucom0: ubsa_request: STALLED > > ucom0: ubsa_request: STALLED > > ... > > (lots more STALLED messages) > > John, > > just added myself to mobile@ (thanks for cross-posting this to usb@ > so I got notice of this discussion). > > If you're using the V620 (or any other (W-)CDMA) card with ppp, you > should make sure you're using: > > set cd 30! (note the exclamation mark at the end) > > I've seen _a lot_ of problem reports (not just with FreeBSD) where > ppp does not recognize a connection loss when using W-CDMA cards. > The exclamation mark forces ppp into waiting for a carrier and > following that CD signal. I'll play around with that, thanks. > I suspect your problems might come from a bad signal. I don't know > much about the V620 (just that it's only used in nothern america) > but if it's a high-speed card (transfer rate > 56k, 3G mode?) you > should force your card into GPRS or 3G mode. I'll experiment with that too. One thing I'm not sure I mentioned in my first post is that the STALLED messages only show up when the device is opened and closed. If I use ppp in manual mode I get about six of them when I first start ppp but none while I issue any AT commands or while the link is active. Then I get about six more when I close the link. It is a (relatively) high-speed card. Under Windows all the fancy third-party software does is create a regular dial-up networking link with a serial speed of 230400. Doing the same with ppp under FreeBSD gets me a usable connection. Under either OS the latency is pretty high (~300ms) and a few packets get dropped here and there, but it beats straight dial-up (or heaven forbid, no connection at all!) > By default W-CDMA cards are trying to auto detect the best signal > reception and that might cause often signal loss due to band change. > > If you know how to force the card into one or the other mode, please > use that in ppp's init string. If you don't know it, you may try the > commands for the U630 (I guess both cards are using the same command > set). You may find a bit info about the U630 at: > http://bsd.vwsoft.com/3g/merlin_u630.html Thanks for the link. More documentation is almost always better. :) > Please note the U630 is serial-over-PCMCIA and not usb so the > hardware is not the same. I thought the V620 is also > serial-over-PCMCIA but it seems you proved me wrong. ;) I was a little surprised when I first plugged it in under Windows and a USB hub popped up. But hey, I didn't design the card or even choose to buy it (it's part of the lucky ball-and-chain package I get from work when I'm on call). Thanks for your response. JN
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