--On Tuesday, January 06, 2009 15:00:50 +0100 Patryk Zawadzki
<pat...@pld-linux.org> wrote:
¦ Allowing one to edit the init string is a security threat similar to
¦ allowing users to provide custom firmware.
OK, i can see there's an issue there.
¦ Other than that there seem to be only two differences between devices
¦ reported so far. One is the initial echo state which is insignificant,
¦ the second one is whether the device supports ATZ or requires AT&F +
¦ defaults.
Not true. I've reported here on more than one occasion the problems with my
modem.
a) it requires an initial <CR> otherwise it fails to see a clean AT command
and doesn't respond - resulting in an init. timeout.
b) its initial CREG state is 1, meaning that NM gets incorrect responses to
its CREG queries later in the conversation. It requires +CREG=0 in the init
string.
By hacking these fixes into the init string it works fine. It's a soft
modem running in a Palm Treo handheld: USBModem by MobileStream. At least
one other poster on this list is using (or trying to) the same software.
Regarding ATZ v. AT&F, I believe the latter should always be supported, as
it is a full reset. ATZ restores to settings saved using AT&W, but if
that's never been used it's the same as AT&F. If AT&W is not supported,
then ATZ may not be either; and if you don't use AT&W to save settings
(does NM?) then there is no reason to use ATZ.
Cheers, Rick
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