This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/OpenBSC@lists.osmocom.org/.
Sylvain Munaut 246tnt at gmail.com> troubleshooting advices are welcome, openbsc website was no help
The clock of the non working one might just be too off ...
See http://openbsc.osmocom.org/trac/wiki/isdnsync for a tool to
calibrate (with appropriate HW).
If you don't have the equipement ... huh, good luck.
You can always try random values until it works.
If you have a USRP you can try to lock onto it and compare offset ...
Cheers,
Sylvain