Set up SIM7000E via PPP

I am trying to set up SIM7000E via ppp. SIM7000E is connected to a beaglebone black via micro USB cable. Beaglebone uses 5.10.168-ti-r71 kernel (Debian). SIM7000E drivers have been installed successfully and also ppp is installed too. I entered the directory /etc/ppp/peers, copied the file provider and named it gprs. Gprs file looks like this: # example configuration for a dialup connection authenticated with PAP or CHAP # # This is the default configuration used by pon(1) and poff(1). # See the manual page pppd(8) for information on all the options. # MUST CHANGE: replace myusername@realm with the PPP login name given to # your by your provider. # There should be a matching entry with the password in /etc/ppp/pap-secrets # and/or /etc/ppp/chap-secrets. user "myusername@realm" # MUST CHANGE: replace ******** with the phone number of your provider. # The /etc/chatscripts/pap chat script may be modified to change the # modem initialization string. connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs" # Serial device to which the modem is connected. /dev/ttyUSB2 # Speed of the serial line. 115200 nocrtscts debug nodetach ipcp-accept-local ipcp-accept-remote # Assumes that your IP address is allocated dynamically by the ISP. noipdefault # Try to get the name server addresses from the ISP. usepeerdns # Use this connection as the default route. defaultroute # Makes pppd "dial again" when the connection is lost. persist # Do not ask the remote to authenticate. noauth Then when I try to call gprs by typing: pppd call gprs The result is this: Script /usr/sbin/chat -v -f /etc/chatscripts/gprs finished (pid 1186), status = 0x0 Serial connection established. using channel 2 Using interface ppp0 Connect: ppp0 /dev/ttyUSB2 sent [LCP ConfReq id=0x1 ] rcvd [LCP ConfReq id=0x4 ] sent [LCP ConfNak id=0x4 ] rcvd [LCP ConfAck id=0x1 ] rcvd [LCP ConfReq id=0x5 ] sent [LCP ConfAck id=0x5 ] sent [LCP EchoReq id=0x0 magic=0xf0cd2f0e] sent [PAP AuthReq id=0x1 user="myusername@realm" password=] rcvd [LCP DiscReq id=0x6 magic=0xd0a7832b] rcvd [LCP EchoRep id=0x0 magic=0xd0a7832b f0 cd 2f 0e] rcvd [PAP AuthAck id=0x1 ""] PAP authentication succeeded sent [CCP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] rcvd [LCP ProtRej id=0x7 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 sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [LCP EchoReq id=0x1 magic=0xf0cd2f0e] IPCP: timeout sending Config-Requests IPV6CP: timeout sending Config-Requests sent [LCP TermReq id=0x2 "No network protocols running"] sent [LCP TermReq id=0x3 "No network protocols running"] Connection terminated. Modem hangup I do not understand where is the problem. Can anyone help with this? The /etc/chatscripts/gprs contains: # You can use this script unmodified to connect to cellular networks. # The APN is specified in the peers file as the argument of the -T command # line option of chat(8). # For details about the AT commands involved please consult the relevant # standard: 3GPP TS 27.007 - AT command set for User Equipment (UE). # (http://www.3gpp.org/ftp/Specs/html-info/27007.htm) ABORT BUSY ABORT VOICE ABORT "NO CARRIER" ABORT "NO DIALTONE" ABORT "NO DIAL TONE" ABORT "NO ANSWER" ABORT "DELAYED" ABORT "ERROR" # cease if the modem is not attached to the network yet ABORT "+CGATT: 0" "" AT TIMEOUT 12 OK ATH OK ATE1 # +CPIN provides the SIM card PIN #OK "AT+CPIN=1234" # +CFUN may allow to configure the handset to limit operations to # GPRS/EDGE/UMTS/etc to save power, but the arguments are not standard # except for 1 which means "full functionality". #OK AT+CFUN=1 OK AT+CGDCONT=1,"IP","\T","",0,0 OK ATD*99# TIMEOUT 22 CONNECT "" I changed the gprs file in /etc/ppp/peers and put this: connect "/usr/sbin/chat -v -f /etc/chatscripts/gprs" -T internet.vodafone.gr I tried to call gprs again and the result was this Script /usr/sbin/chat -v -f /etc/chatscripts/gprs -T internet.vodafone.gr finished (pid 3457), status = 0x0 Serial connection established. using channel 27 Using interface ppp0 Connect: ppp0 /dev/ttyUSB2 sent [LCP ConfReq id=0x1 ] rcvd [LCP ConfReq id=0x0 ] sent [LCP ConfNak id=0x0 ] rcvd [LCP ConfAck id=0x1 ] rcvd [LCP ConfReq id=0x1 ] sent [LCP ConfAck id=0x1 ] sent [LCP EchoReq id=0x0 magic=0x7969ae32] sent [PAP AuthReq id=0x1 user="myusername@realm" password=] rcvd [LCP DiscReq id=0x2 magic=0xd16a9755] rcvd [LCP EchoRep id=0x0 magic=0xd16a9755 79 69 ae 32] rcvd [PAP AuthAck id=0x1 ""] PAP authentication succeeded sent [CCP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] 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 sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] sent [LCP EchoReq id=0x1 magic=0x7969ae32] IPCP: timeout sending Config-Requests IPV6CP: timeout sending Config-Requests sent [LCP TermReq id=0x2 "No network protocols running"] sent [LCP TermReq id=0x3 "No network protocols running"] Connection terminated. Modem hangup Then i changed the /etc/chatscripts/gprs file and put the pin number of my sim card, removing the # sign. Called again gprs and the result now was this: Script /usr/sbin/chat -v -f /etc/chatscripts/gprs -T internet.vodafone.gr finished (pid 3473), status = 0x0 Serial connection established. using channel 28 Using interface ppp0 Connect: ppp0 /dev/ttyUSB2 sent [LCP ConfReq id=0x1 ] rcvd [LCP ConfReq id=0x4 ] sent [LCP ConfNak id=0x4 ] rcvd [LCP ConfAck id=0x1 ] rcvd [LCP ConfReq id=0x5 ] sent [LCP ConfAck id=0x5 ] sent [LCP EchoReq id=0x0 magic=0xc95e726d] sent [PAP AuthReq id=0x1 user="myusername@realm" password=] rcvd [LCP DiscReq id=0x6 magic=0xd172abe9] rcvd [LCP EchoRep id=0x0 magic=0xd172abe9 c9 5e 72 6d] rcvd [PAP AuthAck id=0x1 ""] PAP authentication succeeded sent [CCP ConfReq id=0x1 ] sent [IPCP ConfReq id=0x1 ] sent [IPV6CP ConfReq id=0x1 ] rcvd [LCP ProtRej id=0x7 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 ConfNak id=0x1 ] sent [IPCP ConfReq id=0x2 ] Modem hangup Connection terminated. In other words I did not receive a "No network protocols running" message.