Here is what I've tried so far, and then tested by calling the "test exchange" to no avail.
1) Assigned a static IP to my ooma and then moved ooma into DMZ.
2) port forwarded all of the required ports to the ooma box.
3) turned off/on upnp
I run the port scan from the ooma appliance and it shows Denied Ports UDP 53, 123, 514. ***Does anyone know if the port scan actually works? I get the same port scan results no matter whether the box is in DMZ or not, forwarded or not, upnp on or off. I REALLY need to trouble shoot this issue because this exchange that always fails IS MY CLIENT and I need to speak to them. In the meanwhile I always use my cell phone but that doesn't cut it.
I'm prepared to buy a separate modem if that will solve things. ***Does anyone think that will resolve? If I do, must I buy the separate modem as well, or is it ok to just turn my comcast modem into bridge mode and use it for the modem?
Any insight greatly appreciated!
It's a cicsco, device xb3, model dpc3941t. I had another model but replaced it with this one to see if this resolved the problem. My biz associate uses this model and has no issue. -thank you
I'd get a Motorola modem and a router from Costco instead of using these modem/combo units (especially with built in cable digital voice components).