Re: [Openbts-discuss] B200 and phones wont connect

[Daigle, F. <fd...@cm...>]

Hi Alexander,


How close are you to the USRP? I would recommend a minimum of 2 meters.


Also, Have you added a subscriber for you phone? Seeing the network but not being to join could be a subscription problem too.


Regards,

Frédéric

________________________________
De : Alexander Schmidt <ale...@ya...>
Envoyé : 2 mars 2016 20:16
À : ope...@li...
Objet : [Openbts-discuss] B200 and phones wont connect

Hello Folks,

I have the USRP B200 with 2 Vert900 antennas and no power supply and also no GPSDO.
I'm running OpenBTS 5.0 on Ubuntu 14.04 Desktop.

I am facing the problem ,that my phones Iphone 4s and a Samsung phone can see the Test PLMN 1-1 network, but they cant connect to it.
While they are trying to connect to the network, openbts tells me this:

..
ALERT 4176:4202 2016-03-03T02:08:47.0 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input
ALERT 4176:4202 2016-03-03T02:08:48.2 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input
ALERT 4176:4202 2016-03-03T02:08:49.2 Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH input
Processing signal vector for sig 28
Done processing signal vector for sig 28
Rethrowing signal 28
system call during CLI select loop: Interrupted system call

..and then continues with the Alerts...

OpenBTS> noise
noise RSSI is -80 dB wrt full scale
MS RSSI target is -50 dB wrt full scale
INFO: the current noise level is acceptable.

Of course I have read about this issue in this mailing list, but I already followed all the hints, eg. kept distance between MS and the USRP and I also put GSM.Radio.RxGain to 10 or even less - still not working!

Any other advices?
Would be very happy if I can get this thing going one day.

Big thanks in advance!

Best regards,
Alex