I already posted about the lack of dual power, but the HA100 is being touted as a good fit for “enterprise” customers. However, customers at that level actually need HA with Geo-Redundancy, which this doesn’t offer - it requires the devices to both be in close proximity.
I still say, the system needs to support DNS identification for the system(s) and the ability to sync between them at regular intervals, so a Hot/Standby arrangement can also be set up.
DNS is crucial anyway so a phone can be taken from the office to an off-site location and still work w/o requiring reprogramming.