Re: [Openbts-discuss] Can't register MS on a fresh OpenBTS 5 install

[Thomas M. <tho...@gm...>]

Apologies for this second email but, I managed to catch access burst on
uplink frequency (cf https://framapic.org/IL7FgT9V35di/YrzHY5d4014s.png)
but there is only one or two packet sent.

2016-02-09 18:44 GMT+01:00 Thomas Meghe <tho...@gm...>:

> Hi Ralph,
> Thanks for your answer. rxgain was set to 10 (accordingly to the doc
> regarding USRP hardware), I tried to set it to 0 which is 10db below.
> Nothing is different.
>
> I also tried without the antenna plugged and it still doesn't work. I
> didn't manage to find some crappy speakers at home, I will try elsewhere.
> However, I can clearly see the downlink of the BTS corresponding to the
> ARFCN 80 (which is 951mhz cf
> https://framapic.org/zBlgtJB20AfI/EuZAcpYj0duQ.png) but nothing on the
> uplink (906mhz) when trying to register MS.
>
> Regards.
>
> 2016-02-09 14:35 GMT+01:00 Ralph A. Schmid, dk5ras <ra...@sc...>:
>
>> What is your rx gain setting? Try using 10 or 20 dB below the preset.
>> Also try disconnecting your RX antenna when you are very close to the B200
>> during the tests. Sometimes the access bursts simply are not decoded
>> because the signal is too strong.
>>
>>
>>
>> Can you monitor what the handheld transmits when trying to register? Only
>> access bursts, or a complete SDDCH exchange? You can get an idea if you put
>> the phone on EMI sensitive PC speakers or a cheap radio clock, to hear the
>> annoying GSM noise when it transmits. Access bursts are very short, barely
>> noticeable clicks, only two or three of them in a row, while an established
>> SDDCH produces the typical machinegun / drum machine "tack tackatack
>> tackatack" sound, like when receiving a short message in a commercial
>> network.
>>
>>
>>
>> Ralph.
>>
>>
>>
>> *From:* Thomas Meghe [mailto:tho...@gm...]
>> *Sent:* Tuesday, February 9, 2016 12:33 PM
>> *To:* ope...@li...
>> *Subject:* [Openbts-discuss] Can't register MS on a fresh OpenBTS 5
>> install
>>
>>
>>
>> Hello,
>>
>> I'm currently trying to setup a working OpenBTS 5 testing setup (for
>> testing purposes) on a Ubuntu 14.04 64 bit with a B200. What I've done so
>> far :
>>
>>    - Setup OpenBTS 5 following the guide "Getting started with OpenBTS
>>    guide"
>>    - Everything seems to be functionnal (no compile error, no running
>>    error, radio com with my B200 operational)
>>    - Kept MCC and MNC to testing default values (001 01)
>>    - Control.LUR.OpenRegistration set to *.
>>    - Control.LUR.SendTMSIs set to 1
>>    - sipauthserve running
>>    - noise RSSI is -79 dB wrt full scale
>>    - power downlink is set to -10db
>>    - ARFCN is set to 80 (checked before with OsmocomBB scan that the
>>    associated frequency was not noisy, I can see from my osmophone a nice and
>>    clear peak)
>>
>> I think I didn't missed anything for the crash-test but... I tried to
>> connect on 3 different phones with 3 different simcards (My current one on
>> my Android phone, an old one and a foreign one). All my 3 phones can see
>> the network but no one is able to connect to. The connection process is
>> long and fall short to a "not available" or something else.
>>
>> I'm using my B200 with two Vert 400 antennas (it shall be enough to cover
>> the living room area)
>>
>> Thanks for any help and regards,
>>
>> Tom
>>
>
>