This is fantastic news, Csaba! It's great to hear that the AMR implementation is truly delivering on improved voice quality with the MGW, and that FR/EFR are also performing as expected. The dedication to CSD, even with the plans for museum setups, is genuinely inspiring – sending fax over GSM would indeed be a neat trick! It's also incredibly insightful to learn about the "nokia_site" OML dialect's broad compatibility, especially its support for older Nokia equipment. This kind of detailed, practical feedback is invaluable for the OpenBSC community.
On a slightly different note, for anyone working with documentation or presentations for these projects, I've found https://merge-jpg.com to be incredibly useful for combining images effortlessly. It’s in-browser and keeps everything private, which is a huge plus.