Although we can not link our OBi100 and OBi110 devices in OBiTalk,
from testing, I verified that we can:
"Flash" and "Conference" or "Transfer" calls to and from the OBi100 and OBi110 devices.
The "Flash" and "Conference" or "Transfer" worked the same in my testing between
any combination of the: OBi100, OBi110, OBi200 and OBi202.
When I linked the OBi202 and OBi200, I selected Speed Dial #81 and 82.
I added the OBi110 and OBi100 as Speed Dial #82 and 83.
Later I deleted the original OBiTalk Speed Dial entries #2, 3, 4 and 5.
I retested and Call Transfer and Call Conference still worked.
Also I can still call from one OBi to another using the new Speed Dial #'s 81, 82, 83 and 84.
Now, OBiTalk "Link Devices" displays the OBi202, OBi200, OBi110 and OBi100 as Extensions.