I have an IP phone that I use to work from home that is part of my companies Phone system.
I have used this phone successfully through other Broadband suppliers and it still does. I also help configure them for other home workers so I generally find a way to get them working.
I have recently moved and we now have a BT Home Hub 5 with Infinity. Additionally my company have a BT Business Hub 5 so I generally know my way around the device. I have the phone setup and have also opened ports that I normally open when setting the IP phones up for our other home workers to no success. The phone gets an IP (I have also tried static) from the HH5 but I get a SIP error "SIP Server Not Found". I have had this issue before and have always disabled SIP ALG in the home workers router which normally fixes the issue. I know this setting exists in the business version of the hub because i can access it at work, however the home hub does not have this setting (unless it does and it is hidden).
Has anyone had a similar issue? does anyone know if it is SIP ALG and if so how to turn it off?