Network signal is not belink(on off not work) on Q2406B

Hello All friends…

I would like to know one issue.
I have wavecom Q2406B 8port usb type modem.

Some of port signal LED is not working on off on some my local Telco SIM.
Some of port signal is not working on off on all Telco SIM.
But Some of port signal is working on off on all sim.
Working to all sim for some of ports.,i want to slove something…
Signal LED on off mean i ithink network detect .

Please kindly help me…
Lin