Dhobi: the behavior you are seeing is generated by the Panasonic phone. There's no way to change it.
Robert, I believe my tests agree with yours, if I understand your posts correctly. I was fooled by your first post using the bogus number 555-1212; I thought you meant it literally displayed THAT number!
I Configured a 110 with GV via the portal. The 110 was connected to a Panasonic DECT 6.0 cordless phone.
Called the GV number from a cell phone, unknown to the Panasonic phone's internal phone book. Phone displayed the caller ID number in large characters, which it does when there is no CNAM to display (so, Working As Designed).
Configured a Callcentric DID on SP2. Called that number from the cell phone. Panny displayed "Cell Phone WA" CNAM (as sent by Callcentric) and the numeric CID (so, again, WAD).
Deleted the 110 off my portal, and added a OBi 200 fresh. Configured GV on SP1 and CC on SP2, and plugged in the Panny phone. Made the same two calls.
Called the GV number from the cell phone, again, unknown to the Panny's internal phone book. The Panny's LCD shows a CNAM of "Out of Area", and
the correct numeric CID. But, see my screenshot below. Note that the OBi is not receiving "Out of Area" CNAM from GV; it is receiving nothing.
Called the CC number, and it displayed CNAM and CID as expected.
In any case, my particular Panny phone didn't have a problem displaying the numeric CID, even when the CNAM was either blank or "Out of Area".
As a final test, I replaced the Panny phone with a Uniden
phone. When calling the GV number, the Uniden phone displays "Unknown Name".
These are canned response phrases generated by the telephone's caller ID circuitry; they're not being sent by GV or by the OBi.
Other brands of CID units or phones with CID/CNAM may display some other arbitrary canned phrase,or display nothing...it's not consistent. There's no standard for this.
Remember, the ATA (the 110 or 200) receives whatever CNAM string is sent (or, in the case of GV, not sent) digitally from the service provider. It then locally generates the CNAM and CID, and then sends it out over the analog telephone line (Phone port) between ring 1 and 2 using Bell 202 FSK modulation, based on how it interprets and translates that digital data from the service provider. Apparently, the 110 is sending some different indication of no CNAM to the phone, vs the 200, but this is entirely due to the OBi's firmware. Perhaps the 110 was programmed to send a blank space or some other undisplayable character for GV CNAM, to suppress the canned messages, and the 200 conforms to the standard instead.