Motorola A780 jako USB modem - problem s pppd

[ondrakr]

DD
mam tel. motorola A780 a rad bych ho pouzil jako GPRS modem pripojeny pres 
USB. Diky modulu cdc_acm je modem videt v dev jako /dev/ttyACM0. Pri pokusu o 
spojeni pomoci kppp vse konci logem :


Oct 30 23:13:28 notes pppd[13517]: pppd 2.4.2 started by gentoo, uid 1000
Oct 30 23:13:28 notes pppd[13517]: Using interface ppp0
Oct 30 23:13:28 notes pppd[13517]: Connect: ppp0 <--> /dev/ttyACM0
Oct 30 23:13:31 notes pppd[13517]: Remote message: Welcome to Motorola A760 
Software Modem!
Oct 30 23:13:31 notes pppd[13517]: PAP authentication succeeded
Oct 30 23:13:38 notes pppd[13517]: Terminating on signal 15.
Oct 30 23:13:41 notes pppd[13517]: Connection terminated.
Oct 30 23:13:41 notes pppd[13517]: Exit.


V man pppd jsem nasel co znamena signal 15:
The link was terminated because the peer is not responding to echo requests. 
Nevedel by nekdo co a jak  ?