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Re: Reliability

From: Florin Vancea
Subject: Re: Reliability
Date: Tue, 9 Nov 2004 17:58:24 +0200

Hi kathir, thank you for your input.

Unfortunately our code is not open (as I said it's not part of gnokii nor
based on gnokii or other open-source product). Therefore I cannot post or
e-mail it.
It's been running in "production" for at least 4 years now (probably more),
but some of the devices occasionally lose the connection with the phone. I
was not bothered by this until now because there were always other possible
reasons. Now it begins to bother me and I thought that the gnokii user-pool
might have some true hands-on experience in this matter (and is willing to
share it, too).

As I said, in my case, about 2-3 % of the devices are losing connection
after one day up to one week (controlling system is 386SX @ ~16MHz).
In another case, I get a much higher rate of failure with basically the same
code (running on x51 @ ~11 MHz).
In both cases the controlling code _does_not_crash_. Moreover, the code is
written to proactively restore the communication with the phone. As soon as
the phone is restarted, the controlling device "catches up" and
reestablishes the connection, so I do not think it's a code issue.
I suspect it's a hardware problem or some software glitch in the phones we
use, but I wanted a confirmation from someone on gnokii list with extensive
experience on 5110/6110 .

All the best to you,

----- Original Message ----- 
From: "kathir" <address@hidden>
To: "Discussion forum for gnokii users." <address@hidden>
Sent: Tuesday, November 09, 2004 1:39 PM
Subject: Re: Reliability

> Dear Florin Vancea
>                                   i am using 5110  for doing project "SMS
> Prior to that i tested with pc     i am able to receive  SMS frames  and
> able to decodee it. now i want to port it to PIC   using ccs cross
> i found no  failures . i enclosed source code for u.. if u send u r code
> may be useful to fix the bugs
> address@hidden
> ----- Original Message -----
> From: "Florin Vancea" <address@hidden>
> To: "Discussion forum for gnokii users." <address@hidden>
> Sent: Tuesday, November 09, 2004 11:50 AM
> Subject: Reliability
> > Hello there,
> >
> > Is anyone on this list using 5110 or 6110 "in the long run"?
> > I mean using it for something _continuously_, like server monitoring or
> the
> > like.
> > I wonder if you experienced any communication failures that require the
> > phone to be restarted (eventually by battery removal).
> > What's the average MTBF?
> >
> > (I am _not_ talking about restarts caused by PC-side; only the ones
> > due to the phone failing to communicate at some point in time).
> >
> > If possible, please mention the serial adapter hardware used for the
> > connection.
> >
> > I am running an embedded system (not gnokii-based but using the same
> > principle) communicating with 5110/6110 and every once in a while (i.e.
> days
> > or maybe weeks) the link is lost and the phone must be restarted (with
> > system restart). It does not happen to every system/phone combination.
> > like to know if it's possible to be a phone or serial hardware fault.
> >
> > Thank you,
> > Florin
> >
> >
> >
> >
> > _______________________________________________
> > gnokii-users mailing list
> > address@hidden
> >


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