POWEROFF after the osmo-NITB has been installed

Hello:

I installed the osmo-NITB on ubuntu18.04, including osmo-trx,osmo-bts,and openbsc.

I run these three applications in three terminals successively, it seems ok, but the tx/rx leds on usrp-b210 hardware platform are not lighted,

and the print message in the osmo-trx terminal shows :

Thu Apr 30 15:28:28 2020 DTRXCTRL <0002> Transceiver.cpp:832 [tid=139871716352896][chan=0] command is 'POWEROFF' Thu Apr 30 15:28:28 2020 DTRXCTRL <0002> Transceiver.cpp:977 [tid=139871716352896][chan=0] response is 'RSP POWEROFF 0'

I try to send some commands on another terminal which launch a telnet session which connects to the osmo-bts control interface(port number is 4238) , but it not working.

what can i do next?

thanks a lot.