With a nanoBTS, you don't need a real ISDN card. You can use mISDN modules which are typically compiled in as modules in Linux. My lab has a few 900 and 1800 nanoBTS units, all running over Ethernet/IP, with openBSC, Asterisk, and LCR running on VMs with no ISDN cards, no special hardware.
There is a tutorial on how to set this up here, http://openbsc.osmocom.org/trac/wiki/OpenBSC_LCR . I also found a mailing list post that fills in some blanks, http://www.mail-archive.com/openbsc@lists.gnumonks.org/msg00352.html . I would suggest trying to follow the mailing list post to the letter to set this up, and once it is working make a snapshot then try to update the source of the packages installed.
Chris Rankine
2011/3/17 Luca Bertoncello bertoncello@netzing.de:
Am Thu, 17 Mar 2011 11:10:17 -0400 schrieb Chris Rankine cr3@cr3.us:
Which BTS are you using?
nanoBTS from ip.access.
Greetings
Luca Bertoncello Entwicklung Mail: bertoncello@netzing.de
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