Eurotel CDMA: pppd, chat: modem neodpovida (expect (OK), alarm)
Tomas Sieger
tomas.sieger na systinet.com
Pátek Prosinec 10 16:14:19 CET 2004
Zdravim,
mam netrivialni problem s Eurotel CDMA (modem GPC-6420) v Linuxu, FC3,
jadro 2.4.9.
Pri "instalaci" modemu jsem postupoval podle
http://www.linuxsoft.cz/article.php?id_article=331, tj. pouzivam pppd a
chat. Po instalaci jsem se nekolikrat uspesne (a take neuspesne - ale
menekrat) pripojil a prenesl i par MB.
Ale ted jiz druhy den se mi nedari spojit se s modemem -
vubec nereaguje na AT prikazy, nefunguje ani v minicom-u. Pritom si
nejsem vedom zadne zmeny v konfiguraci HW/OS/SW.
Modem se stale tvari jako USB zarizeni:
# lsusb
Bus 003 Device 002: ID 05c6:3196 Qualcomm, Inc. CDMA Wireless Modem
po pripojeni zapnuteho modemu do USB je modem rozpoznan:
# tail /var/log/syslog:
kernel: usb 3-1: new full speed USB device using address 2
kernel: drivers/usb/class/cdc-acm.c: Ignoring extra header
kernel: cdc_acm 3-1:1.0: ttyACM0: USB ACM device
kernel: usbcore: registered new driver cdc_acm
kernel: drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model
driver for USB modems and ISDN adapters
a je vytvoren /dev/ttyACM0:
# dmesg | tail:
usb 3-1: new full speed USB device using address 2
drivers/usb/class/cdc-acm.c: Ignoring extra header
cdc_acm 3-1:1.0: ttyACM0: USB ACM device
usbcore: registered new driver cdc_acm
drivers/usb/class/cdc-acm.c: v0.23:USB Abstract Control Model driver
for USB modems and ISDN adapters
Pri pokusu o navazani spojeni to ale vzdy skonci takhle:
# tail /var/log/syslog:
pppd[3959]: pppd 2.4.2 started by root, uid 0
chat[3981]: abort on (BUSY)
chat[3981]: send (AT&F^M)
chat[3981]: expect (OK)
chat[3981]: alarm
chat[3981]: Failed
pppd[3959]: Serial connection established.
kernel: divert: not allocating divert_blk for non-ethernet device ppp0
pppd[3959]: Using interface ppp0
pppd[3959]: Connect: ppp0 <--> /dev/ttyACM0
Nemyslim si, ze by to bylo zavineno vlivy typu spatny signal,
nedostatecne nabita baterie, pripojeni vypnuteho modemu do USB apod. -
zkousel jsem ruzne kombinace.
Lze tento problem nejak rozumne ladit?
Vitam jakekoli rady, napady nebo (naznaky) reseni.
predem diky
Tomas S.
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