Re: [Openbts-discuss] My cell phone can receive 00101 base station network, but my phone unable to connect to the 00101 network.

[Arthur R. <art...@gm...>]

No, the situation is clearly due to the radio part.
Clipping should not occur. Just unplug the tx antenna and give it a try.
Also can you check for noise ?


Le Wed Feb 04 2015 at 09:38:41, osese <yc...@16...> a écrit :

> My situation related to mobile phone SIM card?
> I need some special SIM card?
>
> At 2015-02-04 13:30:36, "Tom Tsou" <to...@ts...> wrote:
>
> There's a bug in the CLI that won't let you reduce receive gain below 25
> dB. Can you try again with the mobile a further distance from the BTS?
>
>   -TT
> On Feb 3, 2015 9:26 PM, "osese" <yc...@16...> wrote:
>
>> I will use rxgain command, GS M.R adio. Rxgain = 25<br/><br/>Cell phone
>> still can't connect to the network.<br/><br/>I start the OpenBTS and
>> transceiver respectively<br/>I found that when the mobile phone to connect
>> to the Internet<br/><br/>The OPenBTS will prompt:<br/><br/>OpenBTS&gt;
>> Processing signal vector for sig 28<br/>Done processing signal vector for
>> sig 28<br/>Rethrowing signal 28<br/>system call during CLI select loop:
>> Interrupted system call<br/><br/>Transceiver has been
>> prompt:<br/><br/>ALERT 29574:29599 2015-02-04T11:55:41.0
>> Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH
>> input<br/>ALERT 29574:29599 2015-02-04T11:55:47.6
>> Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH
>> input<br/>ALERT 29574:29599 2015-02-04T11:55:48.6
>> Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH
>> input<br/>ALERT 29574:29599 2015-02-04T11:55:49.8
>> Transceiver.cpp:414:pullRadioVector: Clipping detected on RACH
>> input<br/>......<br/><br/>I use audit command, prompting from the
>> following:<br/><br/>OpenBTS&gt;
>> audit<br/>+---------------------------------------------------------------------+<br/>|
>> ERROR : Invalid Values [key current-value (default)]
>> |<br/>|   To use the default value again, execute: rmconfig key
>>  |<br/>+---------------------------------------------------------------------+<br/>GSM.CCCH.BS_AG_BLKS_RES
>> "auto" ("auto")<br/>GSM.CCCH.BS_PA_MFRMS "2" ("2")<br/>GSM.CallerID.Source
>> "auto" ("auto")<br/>SMS.MIMEType "application/vnd.3gpp.sms"
>> ("application/vnd.3gpp.sms")<br/><br/>+---------------------------------------------------------------------+<br/>|
>> WARNING : Site Values Which Are Still Default [key current-value]
>>  |<br/>|   These should be set to fit your installation: config key value
>>
>> |<br/>+---------------------------------------------------------------------+<br/>GSM.Identity.BSIC.BCC
>> "2"<br/>GSM.Identity.BSIC.NCC "0"<br/>GSM.Identity.CI
>> "10"<br/>GSM.Identity.LAC "1000"<br/>GSM.Identity.MCC
>> "001"<br/>GSM.Identity.MNC "01"<br/><br/>Cell phone still can't connect to
>> the network.
>> At 2015-02-04 02:50:30, "Tom Tsou" <to...@ts...> wrote:
>> >On Tue, Feb 3, 2015 at 2:58 AM, osese <yc...@16...> wrote:
>> >> My cell phone can receive 00101 base station network, but my phone
>> unable to
>> >> connect to the 00101 network?
>> >>
>> >> Start the OpenBTS has the following tips:
>> >> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:29.6
>> >> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>> >> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:30.9
>> >> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>> >> OpenBTS> ALERT 12463:12480 2015-01-30T17:06:37.5
>> >> Transceiver.cpp:414:pullRadioVector:Clipping detected on RACH input
>> >
>> >The handset tries to access the base station - three times - but the
>> >uplink signal is overpowering the receiver and the access bursts are
>> >lost. As others have suggested, posting your setup details is helpful.
>> >In general, though, the receive signal is just too strong.
>> >
>> >When you see the clipping detection triggered, you can try one of the
>> following.
>> >
>> >1. Reduce the RF receive gain through the 'rxgain' command
>> >2. Increase the distance between mobile and the BTS
>> >3. Place an attenuator(s) inline with the receive antenna
>> >
>> >  -TT
>>
>
>
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