Hi all, I set up a 3cx system with a grandstream PSTN. All is working well with all of my phones except my SPA 962's. I can dial out with them, but then they do not work with voice prompts. Example of what is happening I have an auto attendant set up with voice prompts, one of the selections if dial 8 for voice mail. If i dial the external number and get the prompts, and hit 8, nothing happens. It doesnt work for any of the other selections either. Same thing with calling tech support for Verizon for example, if it says press 1 for Internet, press 2 for phone, 3 for billing, etc, it does not work. However, if i dial the auto attendant internally at the extension i set up for it, the phone dials to the prompts just fine, so it is only affecting outside calls routed through the grandstream. As another note, i have some SPA 502 phones set up as well, and these phones have no issue with external number dial prompts. Any ideas?