開機modem一直紅燈

日志：

ShareBuffer=b6aff000, by /test/usbdsploop
[MESSAGE]  libusbdsploop.c: Line: 375; 1115 19:45:26: usbdsp channel count is 0.
[ERROR]  libusbdsploop.c: Line: 378; 1115 19:45:26: no usb dsp found!
ShareBuffer=b6aaf000, by /test/usbdsploop
[MESSAGE]  libusbdsploop.c: Line: 375; 1115 19:45:30: usbdsp channel count is 0.
[ERROR]  libusbdsploop.c: Line: 378; 1115 19:45:30: no usb dsp found!
ShareBuffer=b6b24000, by /test/usbdsploop
[MESSAGE]  libusbdsploop.c: Line: 375; 1115 19:45:33: usbdsp channel count is 0.
[ERROR]  libusbdsploop.c: Line: 378; 1115 19:45:33: no usb dsp found!
[DEBUG]  monitor.c: Line: 6134; 1115 19:45:36: [1]: Use modem device.
[MESSAGE]  monitor.c: Line: 5575; 1115 19:45:36: [1]: modem dev:/dev/ttyUSB30
[DEBUG]  RCUCommon.c: Line: 6386; 1115 19:45:36: [3]: module name in config is SIM939
ShareBuffer=b6acd000, by /test/usbdsploop
[MESSAGE]  libusbdsploop.c: Line: 375; 1115 19:45:37: usbdsp channel count is 0.
[ERROR]  libusbdsploop.c: Line: 378; 1115 19:45:37: no usb dsp found!
[MESSAGE]  monitor.c: Line: 5653; 1115 19:45:40: [1]: modem  CheckSIM Read:at+cpin?

+CME ERROR: SIM not inserted

[WARNING]  monitor.c: Line: 5661; 1115 19:45:40: [1]: Modem SIM reject: /dev/ttyUSB30(0x1103)
[ERROR]  led.c: Line: 1188; 1115 19:45:40: [3]: module error
[DEBUG]  led.c: Line: 817; 1115 19:45:40: [FF]: write d to 380 port
ShareBuffer=b6ab3000, by /test/usbdsploop
[MESSAGE]  libusbdsploop.c: Line: 375; 1115

拔出SIM卡在手機上能正常上網(wǎng)。

這個到底是modem本身有問題（還看到不少其他的error）還是SIM卡槽有問題？