Further testing on incoming calls to the Line Port of OBi110 seems to show:
1. CallerID present, no CName present - Peer Number and Peer Name both show CallerID.
2. CallerID present, CName '' (two single quotation marks followed by space) - Peer Number shows CallerID, Peer Name shows '' (two single quotation marks followed by space).
3. CallerID present, CName " " (a space contained by two double quotation marks) - Peer Number shows CallerID, Peer Name is blank.
The only difference between calls arriving at the Line Port and calls arriving via voip on an sp seems to be number 1. calls via voip on an sp with no CName show Peer Name blank as you would expect.
I have no idea what this proves