Mathieu, I understand that technology *can* have a role to play (though
I think that role is not as major as you might think here). I also
appreciate that this is a level-headed discussion. Please understand I
come from a place of passion about Linux-based operating systems, in
particular Ubuntu. If you don't mind a bit of a read (and I hope this is
a reasonable place to make this post) then please also understand that
my frustration stemmed from the following:

* _many_ 3G modems (and, with that term, I incorporate GPRS and EDGE, since the 
tech involved is often transparent to the user -- the modem is simply supplied 
by a wireless telecoms company on a contract basis) are correctly identified 
and work with the usb-serial kernel module, producing what, for all intents and 
purposes, looks "like" a serial modem to client apps. Even more of these modems 
can be "made to work" by getting their vendor/hardware id's forced at the time 
of module load -- not trivial for a newbie, but fairly simple to do (all things 
considered) when following some kind of instructions to edit default module 
parameters or try out with a modprobe line. The point is that as soon as 
usb-serial has recognised this device, the actual establishing of a connection 
via pppd is trival to script from a dev's point of view -- I would have 
expected the basics of ppp network setup to be available. In other words, the 
hardware here is not the issue. Whether you have a HUAWEI or a cheap Siemens 
modem, whether you use one of the zillions of phones out there which present a 
modem interface via cable, establishing a connection to the internet should be 
really simple with these devices -- and is, if you have a background in Linux 
networking. It's just that the common user is left out in the cold -- as is the 
lazy expert (:
* Even if ppp connections can't be configured through NM (as with wicd, another 
fine lan/wireless network helper), the problem remains that the client-space 
applications all believe NM on the opinion it has with respect to "being 
online". The general idea of being able to help the user with an online status 
is neat -- just not well thought-out if it doesn't cater for one of the most 
common methods for connecting to the internet -- most especially at the time of 
the original post and my "+1". Now that wireless routers and DSL are becoming 
more of the "norm", the importance of this issue may actually, if anything, be 
dwindling a little. But I would still count it as important.
* A larger issue is that gnome-ppp (or similar) isn't installed by default. NM 
is -- and could fill this gap. So the user gets a dvd/cd from a 
friend/colleague who is a FLOSS-pusher, installs (or hits the "try me out" 
option) and finds that something which was really trivial to do under her other 
installed OS is not immediately available to her -- and, as far as I can see, 
for no particularly good reason (yes, there's dev-time -- and yes, I should be 
putting my programming skills where my mouth is!) when the establishment of a 
ppp connection over a serial device has been the granddaddy of internet 
connection methods -- and typically something Linux-based systems actually do 
*better*: faster, better intrinsic hardware support (ie often no need to 
install extra 3rd-party drivers), more reliably -- in my opinion.
* NM offers "Mobile Broadband" and "DSL" connections but won't let the user 
tweak the devices to use -- it's just like NM is so close, but missing that 
crucial cigar -- and I can't rationalise why. Perhaps someone else can?

-- 
MASTER Network Manager integrated ppp support - should allow the configuration 
of dial up modems
https://bugs.launchpad.net/bugs/311581
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