~$ sudo /usr/sbin/pppd call et
Serial connection established.
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB0
sent [LCP ConfReq id=0x1 <asyncmap 0xa0000> <magic 0xf3cb5560> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0xa0000> <magic 0xf3cb5560> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x3 <asyncmap 0xa0000> <pcomp> <accomp> <magic 0xff6ccca2> <auth chap MD5>]
No auth is possible
sent [LCP ConfRej id=0x3 <auth chap MD5>]
rcvd [LCP ConfReq id=0x5 <asyncmap 0xa0000> <pcomp> <accomp> <magic 0xff6ccca2> <auth pap>]
No auth is possible
sent [LCP ConfRej id=0x5 <auth pap>]
rcvd [LCP ConfReq id=0x7 <asyncmap 0xa0000> <pcomp> <accomp> <magic 0xff6ccca2>]
sent [LCP ConfAck id=0x7 <asyncmap 0xa0000> <pcomp> <accomp> <magic 0xff6ccca2>]
sent [LCP EchoReq id=0x0 magic=0xf3cb5560]
sent [CCP ConfReq id=0x1 <mppe -H -M -S -L -D +C> <deflate 15> <deflate(old#) 15> <bsd v1 15>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
rcvd [LCP EchoRep id=0x0 magic=0xff6ccca2]
rcvd [LCP ProtRej id=0x8 80 fd 01 01 00 15 12 06 00 00 00 01 1a 04 78 00 18 04 78]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
rcvd [IPCP ConfReq id=0x1 <addr 192.168.254.254>]
sent [IPCP ConfAck id=0x1 <addr 192.168.254.254>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
rcvd [IPCP ConfNak id=0x1 <addr 10.177.143.157> <ms-dns1 160.218.43.200> <ms-dns3 160.218.10.200>]
sent [IPCP ConfReq id=0x2 <addr 10.177.143.157> <ms-dns1 160.218.43.200> <ms-dns3 160.218.10.200>]
rcvd [IPCP ConfAck id=0x2 <addr 10.177.143.157> <ms-dns1 160.218.43.200> <ms-dns3 160.218.10.200>]
ocal  IP address 10.177.143.157
remote IP address 192.168.254.254
primary   DNS address 160.218.43.200
secondary DNS address 160.218.10.200
Script /etc/ppp/ip-up started (pid 25377)
Script /etc/ppp/ip-up finished (pid 25377), status = 0x1

^C
Terminating on signal 2
Connect time 0.1 minutes.
Sent 0 bytes, received 0 bytes.
Script /etc/ppp/ip-down started (pid 25403)
sent [LCP TermReq id=0x2 "User request"]
rcvd [LCP TermAck id=0x2 "User request"]
Connection terminated.
Serial link disconnected.
Script /etc/ppp/ip-down finished (pid 25403), status = 0x1