4G模块拨号失败，显示Modem hangup

zgzx12345

用4G模块（EC25）拨号上网，一直拨号失败，想请假一下可能是什么原因？


pppd options in effect:
debug           # (from /home/peers/wcdma)
nodetach                # (from /home/peers/wcdma)
dump            # (from /home/peers/wcdma)
noauth          # (from /home/peers/wcdma)
user password           # (from /home/peers/wcdma)
/dev/ttyUSB3            # (from /home/peers/wcdma)
115200          # (from /home/peers/wcdma)
lock            # (from /home/peers/wcdma)
connect /home/app/chat -s -v -f /home/app/wcdma-chat-connect            # (from /home/peers/wcdma)
disconnect /home/app/chat -s -v -f /home/app/wcdma-chat-disconnect              # (from /home/peers/wcdma)
crtscts         # (from /home/peers/wcdma)
local           # (from /home/peers/wcdma)
hide-password           # (from /home/peers/wcdma)
novj            # (from /home/peers/wcdma)
novjccomp               # (from /home/peers/wcdma)
ipcp-accept-local               # (from /home/peers/wcdma)
ipcp-accept-remote              # (from /home/peers/wcdma)
noipdefault             # (from /home/peers/wcdma)
defaultroute            # (from /home/peers/wcdma)
usepeerdns              # (from /home/peers/wcdma)
noccp           # (from /home/peers/wcdma)
abort on (BUSY)
abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (ERROR)
abort on (NO ANSWER)
timeout set to 120 seconds
send (AT^M)
expect (OK)
AT^M^M
OK
-- got it

send (^MATZ^M)
expect (OK)
^M
ATZ^M^M
OK
-- got it

send (^MAT+CGDCONT=1,"IP","CMNET",,0,0^M)
expect (OK)
^M
AT+CGDCONT=1,"IP","CMNET",,0,0^M^M
OK
-- got it

send (ATDT*98*1#^M)
expect (CONNECT)
^M
ATDT*98*1#^M^M
CONNECT
-- got it

send (\d)
normal termination ,exit status =0
Serial connection established.
using channel 9
Using interface ppp0
Connect: ppp0 <--> /dev/ttyUSB3
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfe8945ac> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x18 <asyncmap 0x0> <auth chap MD5> <magic 0xe8f3b1e7> <pcomp> <accomp>]
sent [LCP ConfAck id=0x18 <asyncmap 0x0> <auth chap MD5> <magic 0xe8f3b1e7> <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xfe8945ac> <pcomp> <accomp>]
rcvd [LCP DiscReq id=0x19 magic=0xe8f3b1e7]
rcvd [CHAP Challenge id=0x1 <6f79a6dc80b3e06d206791e20537ec39>, name = "UMTS_CHAP_SRVR"]
sent [CHAP Response id=0x1 <9099eac1384d4aecf5978ae3db153249>, name = "password"]
rcvd [CHAP Success id=0x1 ""]
CHAP authentication succeeded
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>]
sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 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.
abort on (ERROR)
abort on (NO DIALTONE)
\send (\k"^M)
send (+++ATH"^M)

Good bay
normal termination ,exit status =0
Serial link disconnected.
Modem hangup