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Есть модем ZTE MF620, провайдер LIFE
Роутер ASUS WL-500gP V1

ФАЙЛ - dialup

Code:
lock
debug
/dev/usb/tts/0
modem
921600
crtscts
defaultroute
unit 0
updetach
usepeerdns
name life
remotename life
connect "/usr/sbin/chat -s -S -V -t 60 -f /tmp/ppp/dialup.chat 2>/tmp/chat.log"
ФАЙЛ - dialup.chat

Code:
'' 'AT'
'' 'AT+CGDCONT=1,"IP","internet"'
'OK' 'ATD*99#'
'CONNECT' ''
Получаем в логе такое:

Code:
[admin@asus root]$ pppd call dialup
Script /usr/sbin/chat -s -S -V -t 60 -f /tmp/ppp/dialup.chat 2>/tmp/chat.log finished (pid 206), status = 0x0
Serial connection established.
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/usb/tts/0
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x70b74726> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0xd <asyncmap 0x0> <auth chap MD5> <magic 0x3dd2dffa> <pcomp> <accomp>]
sent [LCP ConfAck id=0xd <asyncmap 0x0> <auth chap MD5> <magic 0x3dd2dffa> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x70b74726> <pcomp> <accomp>]
rcvd [LCP DiscReq id=0xe magic=0x3dd2dffa]
rcvd [CHAP Challenge id=0x1 <04d5c8d4be6619cd24ada83e9e36ffb3>, name = "UMTS_CHAP_SRVR"]
sent [CHAP Response id=0x1 <82d16623636663de27e902d9406a1fe2>, name = "life"]
rcvd [CHAP Success id=0x1 ""]
CHAP authentication succeeded
CHAP authentication succeeded
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 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [LCP ProtRej id=0xf 80 fd 01 01 00 15 12 06 00 00 00 01 1a 04 78 00 18 04 78 00 15 03 2f]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 192.168.0.1> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
IPCP: 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
[admin@asus root]$