Hi Alberto i'm having similar issues with caller ID here in mexico, my telephone provider is Telmex and i can figure out the way to get the called Id working. Can you help me with this? I have selected european Fsk in the spa400 and in some calls the caller id is shown correctly but in some others it shows anonymous. The reason i selected FSK method instead of North American is because the default method never worked. I have the firmware 6.1.5 in the spa9000 and 1.1.22 in the spa400.
I hope you can help me if you need any additional information just ask me, thanks in advance.