Hi Enzo,
I also want to eventually set everything up officially with numbers direct from the nanpa, and interconnection agreements for ss7 and pstn data.
I don't have SS7, but I do operate my own Osmocom-based GSM network in USA with each subscriber getting a real NANP phone number, fully interconnected with PSTN, able to make calls to and receive calls from anywhere in the world. I use bulkvs.com for outside PSTN connectivity and getting real phone numbers, but I had to write my own large body of software (https://www.freecalypso.org/hg/themwi-system-sw/) for interconnecting the Osmocom-based network to the outside world in this manner. I will be giving a talk on this topic next month:
https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall
In your experience, has anyone cared that you're leaking emissions a bit?
Thankfully I haven't got into any trouble so far. I don't currently operate with the 925.2 MHz trick I outlined in my first reply, instead I squat in an unused spot in the PCS1900 band, in the 1 MHz guard band before AT&T's 20 MHz LTE signal. I operate at 3 dBm Tx power from the BTS, and I used a handheld spectrum analyzer (RF Explorer) to confirm that the signal goes down to undetectable within a block of my location, long before reaching a tower site where listening monitors are going to be located.
M~