/etc/chatscripts/gprs is in ppp 2.4.5-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | # 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 ""
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