[EdLUG] Text messages

[Edinburgh Linux Users Group]

As usual, all great answers. Trouble is my mobile is  a deprived low IQ
LG-E400 which won't run any more apps, and one of the people I was sending
to uses a basic £20 Nokia  mobile with no smarts on EE PAYG.  One day we'll
all have for a monthly fee a mobile  number with unlimited any-time
minutes, texts and data, though "always on" GiffGaff data isn't  quite
unlimited data when I found Android directions didn't work!  Life seems so
complicated sometimes!

Andrew

On 13 June 2016 at 10:37, Edinburgh Linux Users Group <
edlug at lists.edlug.org.uk> wrote:

> On 06/13/16 10:17, Edinburgh Linux Users Group wrote:
> > I had a situation Friday evening where my handset said messages were
> being
> > sent,GiffGaff(GG), but were not being delivered!
> > Eventually from the GG status page I found that a mast in the
> Inverkeithing
> > are where I live was  out of action.   The messages were eventually
> delivered
> > about 14 hours later!  I was receiving texts OK, and voice both ways was
> working
> >
> > Can anyone point me to a URL where I can read about how the mobile
> network
> > works, or is supposed to work?
> >
> > Its the way my handset said Sent  but they weren't delivered that
> perturbs
> > me.  That just isn't a good system protocol.
>
> GSM is quite complex, 3G mind-numbingly so.  Don't hurt your brain by
> trying
> to understand it.  :-D
>
> SMS stands for "short message service" and is a connectionless protocol (a
> bit
> like UDP) - send and hope.  It was originally intended for engineering
> diagnostic use but was discovered by geeks and found to be what just users
> wanted.
>
> Unfortunately being connectionless there is no end to end reliability
> although
> most networks buffer messages to handle when receiver is not available.
>
> So you got what's expected really.
>
> Use a connection oriented messaging service such as Google Hangouts or
> Whatsapp or Telegraph etc etc if you want more reliability.
>
> Dick
>
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