IPAccess Nanobts error

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Neels Hofmeyr nhofmeyr at sysmocom.de
Thu May 24 14:04:27 UTC 2018


On Thu, May 24, 2018 at 02:02:39PM +0400, Akib Sayyed wrote:
> Dear list
> 
> I am trying to register IPAccess NanotBTS using OsmoNiTB after some time
> BTS gives error and restarts. I have attached log of osmonitb.
> 
> Here is some part of log
> 
> ERROR <0004> (bts=0,trx=0,ts=0,pchan=CCCH+SDCCH4) Abis RSL rx IPACC:
> mismatching chan_nr=0x08

Can confirm that for CCCH+SDCCH4, chan_nr should not be 0x08 but 0x20.

> ERROR <0004> (bts=0,trx=0,ts=1,pchan=SDCCH8) Abis RSL rx IPACC: mismatching
> chan_nr=0x09

For SDDCH8, chan_nr should be 0x41

So something is definitely amiss, maybe you need to work around some of the
quirks of the nanoBTS I've heard about? Like, what was it, you need to send the
config twice? You need to send some parts of the config separately? Reboot
after configuring? Not sure exactly, but that are the things I've overheard
here and there. Maybe someone else has a pointer or a hint...

~N

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