From: Denis Kenzior <denkenz@gmail.com>
To: ofono@ofono.org
Subject: Re: GPRS re-connect problem
Date: Tue, 19 Jun 2012 03:30:07 -0500 [thread overview]
Message-ID: <4FE0388F.4060203@gmail.com> (raw)
In-Reply-To: <4FE2FCC5.3010008@hale.at>
[-- Attachment #1: Type: text/plain, Size: 1156 bytes --]
Hi August,
On 06/21/2012 05:51 AM, August Mayer wrote:
> Hello,
>
> When connecting again to GPRS / PPP, after an Internet connection has
> been closed previously, the connection seems to fail. It looks like the
> ofono_modem serial data channel is completely closed when a PPP
> connection is shut down. I'm using a Telit Modem, which provides several
> serial ports, and am right now using separate serials for the AT chat
> and the data/PPP; for this reason, the AT chat continues working, but
> the data channel is dead.
>
Something similar was happening on Qualcomm based modems from Huawei,
ZTE, etc. The modem was sending a HUP on the PPP channel after PPP link
was dropped. I believe the preferred solution was to send AT&C0 when
initializing that port.
> My question is, is it somehow necessary to re-initialise the modem data
> serial channel after a PPP connection? Or could there be a conceptual
> problem that I have overlooked?
>
This can be possible as well. See commit
7ed56d6844f8131cbf981e482b7bded8b20db7ab for another possible solution
(prior to &C0) that can be used as well.
Regards,
-Denis
next prev parent reply other threads:[~2012-06-19 8:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-21 10:51 GPRS re-connect problem August Mayer
2012-06-19 8:30 ` Denis Kenzior [this message]
2012-06-25 8:17 ` August Mayer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4FE0388F.4060203@gmail.com \
--to=denkenz@gmail.com \
--cc=ofono@ofono.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox