One of our newest partners ran into a problem with Huawei phones and PBXware, so we did interop testing and were able to fix the problem.
They were testing with a PBXware demo and nearly ready to make the purchase, but there was one problem: They could not register their Huawei PBX handsets.
Our support team quickly set up a test extension and the customer was able to successfully register and use two phones. At first, the handsets had no sound, but this was fixed quickly by adding huawei.com to the whitelist.
Moral of the story? If you are having any trouble, just ask! We are more than happy to discuss any problems and will do whatever we can to create a workaround.