Hi,

I'm guessing I would need to perform surgery on OSMOCOM-BB code in order

to

connect it to another network? Is there any in built feature that would allow me to do so directly?

As I understand, you want to connect the network you running yourself on OpenBTS. There are two modes of network selection: manual and automatic (when MCC/MNC from SIM card are used). Have a look at the 'network-selection-mode' in your config file (~/.osmocom/bb/mobile.cfg). Also, have a look at the 'network' command in VTY.

You can also create a virtual SIM card in your ~/.osmocom/bb/mobile.cfg (look at the 'test-sim' section) with desired IMSI and RPLMN (001 / 01 by default). Then you will be able to attach one using the 'sim testcard 1'.

With best regards, Vadim Yanitskiy.