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________________________________ From: Neels Hofmeyr nhofmeyr@sysmocom.de Sent: Wednesday, April 3, 2024 8:37 To: JPichel jonathanpc@protonmail.com Cc: openbsc@lists.osmocom.org openbsc@lists.osmocom.org Subject: Re: Channel Requests not being responded when running CS-only 2G network
On Fri, Mar 29, 2024 at 11:09:24PM -0000, JPichel wrote:
This are some examples of the problems I am experiencing, and they all seem to involve one of the radio not responding to some messages. Also I noticed this mainly happens the more I wait without making any connection between a terminal and the network, so if I connect the terminal to the network, then wait 10 minutes, and try to execute an USSD code, it is more likely than there is a error establishing the connection.
This sounds like the time I was using a B210 without a solid external clock. Randomness to the point of sometimes seeming reliable.
Funny part is, it didn't get better when I connected a GPS antenna. Then learned that the B210 had only the external connector without a GPS receiver inside.
Connecting the 10MHz external oscillator made things work nicely. (Or a sysmoBTS also does.)
~N
-- - Neels Hofmeyr nhofmeyr@sysmocom.de http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Harald Welte