Yes, so your SPA is processing the star codes and not FPL. You might be misinterpreting what I wrote previously.
There's two possible ways *67 (block outgoing CID) works:
1)You can send *67 through the service provider, who then either accepts the code or doesn't do anything. FPL, by default, doesn't do anything. At least that was the case before server migration:
viewtopic.php?f=15&t=19702. There have been a few exceptions made for certain individuals, but it's rare. My FPL account doesn't do anything for *67 after server migration.
When you're using *xx in your dial plan (*xx matches *67), you're trying to have *67 sent to FPL, which doesn't do anything for most FPL accounts.
2) You can have *67 processed by your ATA, which sends an anonymous call flag in the SIP header along the path to the receiving carrier that, in turn, has to recognize and agree to not show CID. *67 (outgoing CID block) calls to Telus mobile numbers work when *67 is processed by the ATA. That is, no caller ID is displayed. When *67 is parsed by an ATA or IP Phone, my FPL number constantly appears when calling Fongo Mobile numbers. But it's blocked when calling regular Telus mobile numbers, for example. Telus Mobility acknowledges the flag and complies. Fongo Mobile doesn't.
How blocking CID behaves when processed by the device (as opposed to the service provider) should be the similar regardless of the device being used. So it shouldn’t matter what brand ATA is being used.
If you're trying to get your ATA to do #2, you'd need to remove *xx from your dial plan so that *67 isn't sent to FPL.
If my FPL account accepted the *67 code (when sending *67 through FPL and not having the star code processed by my ATA instead) and agreed to block outgoing CID, my FPL number would not appear when calling Fongo Mobile numbers. Refer to point #1.
For *69, method #1 won't work at all (FPL won't process it). Your ATA might (method #2), but I don't have your ATA and can't test. Again, you'd need to remove *xx from your dial plan so that *69 isn't sent to FPL