gprs-eric-connect-chat

基于嵌入式linux和s3c2440的gprs拨号脚本程序

# 
# chat script to open Sonera GPRS service with Ericsson R520m. 
#
# If ppp negotiation stalls, try restarting the phone. 
# For more details of what the commands do, see ETSI TS 127 007
# (AT command set for User Equipment), at http://www.etsi.org/,
# and your phone's documentation.
#
# $Id: gprs-eric-connect-chat,v 1.4 2001/12/18 15:58:37 tjd21 Exp $

# Boilerplate
#
	ABORT		'BUSY'
	ABORT		'NO ANSWER'
	ABORT		'NO CARRIER'
	ABORT		'NO DIALTONE'
	ABORT		'\nRINGING\r\n\r\nRINGING\r'
	SAY		"GPRS modem init: press <ctrl>-C to disconnect"

# Wake up the modem
#
	TIMEOUT		5
	''		'+++AT'
	OK-ATQ0V1&C1-OK	'ATE1'
	ABORT		'ERROR'
	TIMEOUT		12


# Factory defaults on the Ericsson are pretty sane; let's go with them.
# (RTS/CTS, 50sec call timeout, 8n1/auto-rate, verbose responses) 
# Also, use '+CME ERROR' codes for ME errors, 'ERROR' for syntax errors
#
	OK		'AT&F'
        OK		'AT+CMEE=2'

# The Ericsson has multiple contexts; set ourselves up in context 2:
# cid          = 2                 (which context)
# PDP_type     = IP                (packet type)
# APN          = mob.cl.cam.ac.uk  (GGSN)
# PDP_addr     = "0.0.0.0"         (our address, null means they choose)
# data_comp    = 0                 (data compression)
# head_comp    = 0                 (header compression)
#
	OK		'AT+CGDCONT=2,"IP","mob.cl.cam.ac.uk","0.0.0.0",0,0'
	SAY		"\n + defining PDP context"

# QoS requested, and minimum accptable, for our context
# (<cid>,<precedence>,<delay>,<reliability>,<peak>,<mean>)
# "0" means let the network pick.
#
	OK		'AT+CGQREQ=2,0,0,0,0,0'
	SAY		"\n + defining QoS requirements"
	OK		'AT+CGQMIN=2,0,0,0,0,0'

# Attach to the GPRS service.  Strictly, we don't need this step,
# as AT+CGDATA will do it for us, but doing it explicitly makes it
# a little easier to debug.
#
	TIMEOUT		45
	OK		'AT+CGATT=1'
	SAY		"\n + attaching to GPRS"

# Enter data state
#
	OK		'AT+CGDATA="PPP",2'
	SAY		"\n + requesting data connection"
	CONNECT		''
	SAY		"\n + connected"