[retronet-discuss] Using RPi5 with icE1usb, 2xE1

Hello fellow retronetworkers, I am now looking into possibly using icE1usb to talk to my Nokia TRAU. My original was to use a Digium PCI card, but I ran into issues: a) The only machine I have with a PCI slot is a production machine; b) My naive hope that DAHDI would "just work" did not pan out; c) Deeper troubleshooting would require subjecting this production machine to more downtime than allowable. Hence I am looking at the alternative of using icE1usb instead. There is one sticking point though: unlike a BTS, playing with a TRAU requires a minimum of two E1 circuits, one for A i/f and one for Ater. And I know that few host systems can drive icE1usb with both interfaces in terms of USB limitations. However, this page says that Raspberry Pi 5 should do the trick: https://osmocom.org/projects/e1-t1-adapter/wiki/Isochronous_USB_Issues I am thinking about getting an RPi5 specifically for the purpose of driving icE1usb with both E1 interfaces active. The requirement of having no other USB devices will be easy to satisfy: the whole RPi5 will be just for this purpose and no other. But I would like to confirm: a) Does anyone here have actual experience with RPi5 driving both E1 interfaces on an icE1usb? b) RPi5 has two kinds of USB host ports: some USB2 and some USB3. Which would be better to use for icE1usb? TIA for any leads, M~