E1 antennas (numbers are for 1.9GHz, 2.4GHz beltpack capacity is reduced)
Up to 10-25 beltpacks roaming between 2-5 antennas but not likely to roam to a distant system without a power cycle.
E-Que or base in Splitter mode, FSII-SPL in Local Sync Mode, E1 to E1 over IP using any adapter that doesn’t do anything with framing.
Up to 5 beltpacks connected to a single antenna which generates local sync if none provided. E1 to E1 goes over IP adapter.
IPT antennas (with < 10ms delay for audio packets)
Same subnet, separate VLAN, good PTPv2 over network (possibly with boundary clock) – works from v10.
Same subnet, PTPv2 provided to both locations separately using GNSS/GPS-locked PTP – works from v10.
Different subnet, different VLAN, PTPv2 provided to both locations separately using GNSS/GPS-locked PTP:
Use IP addresses rather than mDNS for addressing.
Layer 2 routing with local switch providing MAC forwarding - works from v11.1
Layer 3 routing, no switch assistance – works from v12.4 (IPA: 188.8.131.52 / IPT: 184.108.40.206 or better)
Be aware that Ethernet over E1 is a product category too, and those tend to have more search results.