Do you see any alarms when trying to make a call? Try the alarms command. 

On Monday, November 26, 2012, Daniel Melo wrote:

So, I used sudo chrt 80 ./OpenBTS, it helped me, but now when I connect  the cellphone with the network, it doesnt show any message and in the TMSIS  in OpenBTSCLI it shows me  the IMSI of the cellphone, Nevertheless, when I try to call to 600 it doesnt work, it doesnt show me anything,  anything happend... I want to know, if  this wiki can help me to solve my problem.

What should be the message when the system  is ready? 

Thanks for your colaboration

2012/11/17 Alexander Chemeris <>
It usually means your PC is too slow or under heavy load or somehow
else can't catch up with real time. Try using 'sudo chrt 80 ./OpenBTS'
- sometimes it helps.

On Sat, Nov 17, 2012 at 8:42 AM, Daniel Melo <> wrote:
> hello
> When I try to connect the cellphone with OpenBTS , the output is:
> ortp-warning-Must catchup 83 miliseconds.
> ortp-warning-Must catchup 73 miliseconds.
> ortp-warning-Must catchup 63 miliseconds.
> ortp-warning-Must catchup 53 miliseconds.
> What could be the problem?
> Thanks a lot for your colaboration.
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Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио