Osmocom Analog

Hello to All oscom-analog developers, users, and fans!

Recentlt I have a pleasure to have some fun with my NMT 450i Centertel phones and osmocom!

I have a question - I want to make phone - to phone call. I did setup two soundcards on USB and four radios. All setup to frequency that osmocom ask for... but no success to make phone to phone call.

What I do wrong? Is that the USB cards I am using wrong or command to Osmocom I use wrong. Phone works good when I am using one card. I can dial phone from software, I can make call to any number, I can send sms, but when I connect two sound cards four radios it seems then that calling one phone to other there is no answer... any suggestions?

Also I’d love to make outgoing call to PBX. Is LCR needed? ISDN card...? Any help ...?

Regards and greetibgs to all great people!

Jacek