OK, up and running on #hamsoverIP and a first QSO there with Steve #K4KSA in Florida, using Zoiper on Android.

If I understand the system topology, we were connected on Hams Over IP 15000 via Allstar 49050 which #N8EMA runs with a multiport connection to a few different nets.

http://stats.allstarlink.org/stats/49050
https://www.qrz.com/db/N8EMA

Appreciate everyone's help in getting this started, and also to @Mark2E1CEQ for getting this started.

I will do a proper writeup after a little more experimentation.