This is actually a rhetorical question now as last year I asked TPG for help with my modem but I was just told to ask the manufacture which I did who said I should ask TPG! So again this morning I thought I would have another go at getting help from TPG support and chatted online with someone for half an hour who also suggested that I contact the manufacture and a little while later suggested that my device must be faulty, which I knew it wasn't. He said that would esculate my problem which I thanked him for but after the chat ended I did a little bit of research and got to thinking that maybe it was an IP address range problem. In the Advanced > Network > LAN Settings > DHCP Server the modem IP address came set to 192.168.1.1 and the IP Address Pool to 192.168.1.1 - 192.168.1.199 but as my device's IP address was set to 192.168.0.2 the modem and device failed to communicate. I simply changed the modem's IP Address to 192.168.0.1 and the IP Address Pool to 192.168.0.1 - 192.168.0.199 and all was good and for the first time in six months I could interact with the device 
One of the reasons I switched to TPG was that I had been told by a number of people that the TPG support was very good but my two experiences have been disappointing. It appears that the level of training is poor in not being able to provide support for a configuration issue such as this! I even suggested to the support person this morning that I suspected that it may just be a configuration problem and not a faulty device as via the Traffic Monitor in System Tools I could see them talking to each other and sadly when i asked the support person if I could upload a screen shot of this activity to him he said I couldn't?
