求教，中兴3g上网卡掉线的问题，型号AC582

stitchwillow

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配置如下：
lsusb内容：
Bus001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus001 Device 002: ID 0424:9512 Standard Microsystems Corp.
! V/ P( v$ M$ [: f. DBus001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
8 U1 @) S/ e' P' fBus001 Device 004: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
* Y2 J& R# T4 d4 O0 z  ^Bus001 Device 005: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 WirelessAdapter
9 z! {- d: \# j' O" iBus001 Device 006: ID 04b3:3025 IBM Corp. NetVista Full Width Keyboard
3 h* I! L0 N) u5 F; l- w! T/ m# ^Bus001 Device 009: ID 19d2:0152 ZTE WCDMA Technologies MSM
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vi /etc/usb_modeswitch.conf
将里面内容改为：
DisableSwitching=0
DefaultVendor= 0x19d2
DefaultProduct= 0x0026
- p$ q1 \3 p/ I: |TargetVendor= 0x19d2
TargetProduct= 0x0152
( M* ?1 M2 G3 a0 @1 ?" i5 w1 dMessageContent="5553424312345678240000008000061b000000020000000000000000000000"
; r% Z# Z" k9 NCheckSuccess=5
$ b- N( T) [6 R$ l3 S; _HuaweiMode=0

运行usb_modeswitch -W -c /etc/usb_modeswitch.conf
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vi /etc/wvdial.conf
0 x* n3 W. c2 n; m7 V. v8 o, j内容为：
[Dialer 3g]
% Y7 z" h! a9 V' e  PInit1 = ATZ
0 V5 l( J7 ?; p& Q/ H( BInit2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
2 S0 F/ D% {% i! d. LStupid Mode = 1
Modem Type = Analog Modem
2 y* c6 H9 b0 a! f# |$ NISDN = 0
# z+ r% e+ Y) |( I# |New PPPD = yesPhone = #777
Modem = /dev/ttyUSB0
Username = ctnet@mycdma.cn
" M9 a; j/ z& z% o7 [& BPassword= vnet.mobi

wvdial 3g拨号正常上网。
时间久了不定时掉线
掉线提示：A modem hung up the phone (exit code 16)
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dmesg 显示多出如下信息：
2 ?: Y  ^: _2 K5 E[28924.835673] option1 ttyUSB0: option_instat_callback: error -108
[28924.847101] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
' K" \8 \! a; K' H' o5 P) U4 J[28924.847266] option 1-1.3.2:1.0: device disconnected
+ Q' q2 u, h, n6 Y; o8 u0 Z  V! X[28924.851020] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
5 I: K6 K! e6 D, w: J[28924.851128] option 1-1.3.2:1.1: device disconnected
) B7 {# h6 R/ v& p: e$ _& e, W[28924.851505] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[28924.851594] option 1-1.3.2:1.2: device disconnected
[28924.851922] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[28924.852071] option 1-1.3.2:1.3: device disconnected
! q( v+ L% Y# D# j$ ][28924.852471] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
4 e" s6 c& h. a8 ^$ H2 X7 I[28924.852564] option 1-1.3.2:1.4: device disconnected
$ z+ a# e0 x- C0 D- @0 u[28924.947089] usb 1-1.3.2: reset full-speed USB device number 6 using dwc_otg
$ k8 ?& {% W6 U) ^[28925.027054] usb 1-1.3.2: device descriptor read/64, error -32
2 m( W6 ]: W1 O' ?0 p/ L[28925.158316] usb 1-1.3.2: USB disconnect, device number 6
: w9 g! c( q2 i! O1 w6 U[28925.470122] usb 1-1.3.2: new full-speed USB device number 9 using dwc_otg
8 v5 T) {- S& v8 F' O+ D[28925.592934] usb 1-1.3.2: New USB device found, idVendor=19d2, idProduct=0152
5 c- u5 f, ~) l% }. T[28925.592966] usb 1-1.3.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[28925.592984] usb 1-1.3.2: Product: ZTE CDMA Technologies MSM
0 ^# k8 z* O& K" x- k[28925.592999] usb 1-1.3.2: Manufacturer: ZTE, Incorporated
0 l, U9 [. r& ^7 ^/ X8 j  s+ t- ?[28925.600518] option 1-1.3.2:1.0: GSM modem (1-port) converter detected
[28925.601158] usb 1-1.3.2: GSM modem (1-port) converter now attached to ttyUSB0
[28925.603503] option 1-1.3.2:1.1: GSM modem (1-port) converter detected
1 n' @( `& B1 a" O: G[28925.603999] usb 1-1.3.2: GSM modem (1-port) converter now attached to ttyUSB1

在掉线以后再用wvdial 3g拨号则会出现如下情况：
9 m; E: T  j' c/ ^$ N: d# D8 a--> WvDial: Internet dialer version 1.61
9 ?% w2 N9 W- j  c) S--> Initializing modem.
3 L7 Q) b5 P3 x( M! Q$ S9 w( V--> Sending: ATZ
--> Sending: ATQ0
, Z$ f. S- v0 U: g9 x/ i6 S--> Re-Sending: ATZ
3 f' {. X% G4 s- v) D/ Z* `--> Modem not responding.
无法拨号
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拔掉3g上网卡再重新插上，重新拨号又可以正常上网，求教一下3g上网卡掉线提示是什么意思，该如何解决。
本人刚入论坛不久没法给出多余金币望见谅。


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