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

[Tom T. <to...@ts...>]

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
>