Re: Sony Ericsson GC79 802.11g/GPRS modem pcmcia card
David A. Patterson wrote:
I just purchased one of these cards and service from T-Mobile in the
U.S. for $29/month. It works fine with ndiswrapper for the 802.11b and
serial_cs for the GPRS "modem". While like with all things from
Broadcom, I wish they'd get over themselves and release real specs so a
proper Linux driver could be made for the 802.11b chipset, at least it
can be made to work.
Sorry, the second part of the question: The card's been relabled by
T-Mobile as Sony Ericsson GC79 (it's a recent purchase)
# cardctl ident
product info: "Broadcom", "802.11g/GPRS CardBus", "1.0"
manfid: 0x02d0, 0x0432
The card can't be put into mode Monitor or Master with iwconfig, but
Ad-Hoc, channel switching, mode Auto, etc. work OK. Good for my needs,
but airsnort won't work with it -
The modem side is auto tri-band, so I can use it with my Bangkok mobile
service when I get home...
Testing last night while my wife drove, travelling about 80 miles in and
around the Denver Metro area and north to Greeley, Colorado at speeds
ranging from 0 to 75 MPH yielded no dropped service and continuous data
activity. 56K is slow, but workable for many things. Pretty neat. I
never really saw it fall below 56K speeds, but did see some slight
delays during cell-site handoffs.
I just wanted to say thanks, David. Your modified pppconfig scripts
work beautifully. Thank you for sharing them.
I also noticed that in the Windows software I have the "VPN" service
which appears to bypass the proxy's and compression and get a real IP
address. I haven't completed testing this under Windows, and the
documentation you referenced from the guy at O'Riley and Associates says
that changing to "internet3.voicestream.net" should allow connections
this way under Linux, however the call attempt fails whenever I try this
here. I'm assuming this means that the Windows software is sending
something different nowadays to the modem, but I am not sure how to
"see" what it's doing under Windows when talking to the card. If anyone
knows of any interesting ways to do this, I'll try them and post my
Now I need to hack together some scripts to auto-switch between the two
whenever I'm out of range of 802.11b... one of those projects that will
probably "never get done", but nonetheless, it's on the "list".
A friend has the AT&T GPRS EDGE card he uses under Windows and it
operates at about 3x-4x the speed of the T-Mobile card, but at a price
of about 3x also. $29/month is as close to "reasonable" as I could find
for an "always-on anywhere" type data service. Good stuff.
Nate Duehr, email@example.com