Ok, I've updated the stick with a new firmware and now it seems so that i get connected. Next problem is, that I don't get an ip-adress. What could be the reason for this?
Mar 19 13:37:19 ppp: [opt2_link0] LCP: authorization successful
Mar 19 13:37:19 ppp: [opt2_link0] Link: Matched action 'bundle "opt2" ""'
Mar 19 13:37:19 ppp: [opt2_link0] Link: Join bundle "opt2"
Mar 19 13:37:19 ppp: [opt2] Bundle: Status update: up 1 link, total bandwidth 28800 bps
Mar 19 13:37:19 ppp: [opt2] IPCP: Open event
Mar 19 13:37:19 ppp: [opt2] IPCP: state change Initial –> Starting
Mar 19 13:37:19 ppp: [opt2] IPCP: LayerStart
Mar 19 13:37:19 ppp: [opt2] IPCP: Up event
Mar 19 13:37:19 ppp: [opt2] IPCP: state change Starting –> Req-Sent
Mar 19 13:37:19 ppp: [opt2] IPCP: SendConfigReq #1
Mar 19 13:37:19 ppp: [opt2] IPADDR 0.0.0.0
Mar 19 13:37:19 ppp: [opt2] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Mar 19 13:37:19 ppp: [opt2] PRIDNS 0.0.0.0
Mar 19 13:37:19 ppp: [opt2] SECDNS 0.0.0.0
Mar 19 13:37:21 ppp: [opt2] IPCP: SendConfigReq #2
Mar 19 13:37:21 ppp: [opt2] IPADDR 0.0.0.0
Mar 19 13:37:21 ppp: [opt2] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Mar 19 13:37:21 ppp: [opt2] PRIDNS 0.0.0.0
Mar 19 13:37:21 ppp: [opt2] SECDNS 0.0.0.0
Mar 19 13:37:23 ppp: [opt2] IPCP: SendConfigReq #3
Mar 19 13:37:23 ppp: [opt2] IPADDR 0.0.0.0
Mar 19 13:37:23 ppp: [opt2] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Mar 19 13:37:23 ppp: [opt2] PRIDNS 0.0.0.0
Mar 19 13:37:23 ppp: [opt2] SECDNS 0.0.0.0
Mar 19 13:37:25 ppp: [opt2] IPCP: SendConfigReq #4
Mar 19 13:37:25 ppp: [opt2] IPADDR 0.0.0.0
Mar 19 13:37:25 ppp: [opt2] COMPPROTO VJCOMP, 16 comp. channels, no comp-cid
Mar 19 13:37:25 ppp: [opt2] PRIDNS 0.0.0.0
Mar 19 13:37:25 ppp: [opt2] SECDNS 0.0.0.0