Nokia770-49:~# rfcomm release 0
Nokia770-49:~# rfcomm bind 0 00:0F:86:A0:54:E2 5
Nokia770-49:~# pppd call gprs
Press CTRL-C to close the connection at any stage!
defining PDP context...
Serial connection established.
using channel 6
Using interface ppp0
Connect: ppp0 <--> /dev/rfcomm0
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xe4eec2ce> <pcomp> <accomp>]
LCP: timeout sending Config-Requests
Connection terminated.
Receive serial link is not 8-bit clean:
Problem: all had bit 7 set to 0

Sending break to the modem

PDP context detached
Serial link disconnected.