successful initial proof-of-concept of OCTOI TDMoIP
The setup consisted of two icE1usb USB-E1 interfaces with built-in GPS-DO transporting an E1 line over an intermediate IP network. The clock synchronization has been monitored and sufficient stability over a period of several hours was confirmed, with no underruns/overruns or cycle slips.
The compression feature was working as expected: E1 timeslots with no change compared to the previous frame were supressed. The batching feature (32 E1 frames per UDP packet) was equally working as expected.There's still a lot of work to do to make this more usable via consume internet connections with NAT and dynamic IP addresses, but the concepts could be shown to work in practice:
- using GPS-DO clocked icE1usb to avoid clock drift
- using batching of E1 frames
- suppressing transmission of timeslots with no data