I'm clearing out some old gear and have come across a Xorcom Astribank unit configured with 16 FXS ports (for analogue phones) as well as RJ45 connectors for switch inputs and outputs.
This unit operated phones within a primary school from early 2008 to early 2009 when it was removed due to changing requirements. We did have unresolved echo issues (you may have more luck with this than I did) and it also didn't have enough power to ring all phones simultaneously. It has sat in storage since.
It connects directly to a PC running Asterisk via a USB interface.
It comes with original instruction manual and a likely out of date CD. It does NOT come with a power supply, I have no idea where that went (it takes 12V DC, its required current is not mentioned on the unit or in the manual). I'll continue to keep an eye out for the power supply in case it turns up.
Free to a good home (or office, or school, or whatever), strictly as is. PM me.
I'm in the Auckland isthmus area.