Hello Gentlemen, I find this post very interesting. I have set up many traditional T1s with my father here in Canada (I am 17), and looking to experiment with SS7 signaling. I have been reading up on it quite a bit and have some questions. I see you guys are using T1 cards for the interconnect. Is this after the link has been muxed? Or is the signaling coming in on T1/E1s? Sorry if this is a stupid question. More specifically is the SS7 interconnect with the CO done using grouped PRI trunks mapped in a T&E1/3 transport layer. Or A-Links, STM-1..... I really want to experiment with an interconnect using the SS7 signaling to help bring to light what I have been studying. What is the minimum I would need to ask a service provider for in terms of service (i.e., T1 with SS7 signaling?), and hardware. Last question I promise!!! It seems that this setup Asterisk+lib_ss7+digium cards act as a media gateway? This is really cool once stable! Kind Regards, Nick.