Hangup (SIGHUP)
Modem hangup

root@colibri-imx7:~# pon vivo-3g.provider
root@colibri-imx7:~# tail -f ppp

OK
OK
CONNECT
Script chat -v -f /etc/ppp/chat/vivo-3g.chat finished (pid 761), status = 0x0
Serial connection established.
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB0
sent [LCP ConfReq id=0x1 <asyncmap 0xa0000> <magic 0x4e07a524> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x1 <accomp> <pcomp> <asyncmap 0x0> <mru 1500> <magic 0x543> <auth chap MD5>]
sent [LCP ConfNak id=0x1 <auth pap>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0xa0000> <magic 0x4e07a524> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x2 <accomp> <pcomp> <asyncmap 0x0> <mru 1500> <magic 0x543> <auth pap>]
sent [LCP ConfAck id=0x2 <accomp> <pcomp> <asyncmap 0x0> <mru 1500> <magic 0x543> <auth pap>]
sent [LCP EchoReq id=0x0 magic=0x4e07a524]
sent [PAP AuthReq id=0x1 user="vivo" password=<hidden>]
rcvd [LCP EchoRep id=0x0 magic=0x543]
rcvd [PAP AuthAck id=0x1 "Greetings!!"]
Remote message: Greetings!!
PAP authentication succeeded
sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [LCP ProtRej id=0x3 80 fd 01 01 00 0f 1a 04 78 00 18 04 78 00 15 03 2f]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
rcvd [IPCP ConfReq id=0x1]
sent [IPCP ConfNak id=0x1 <addr 0.0.0.0>]
Hangup (SIGHUP)
Modem hangup
Connection terminated.