Just bought a SIP from some bum who sold me his old SIP/router which is locked to his VoIP service.  I don't know what it is. As such it is a door stop now.

Do you have  Linux Firmware available on it under this name or any other name you might know which this unit uses?

Obviously I called the Signal importer who were very helpful until they discovered I was trying to use a locked SIP.  Then they tried to get rid of me immediately by referring me to the seller (meaning the VoIP provider who they know wouldn't dream of giving me any unlock code)

Is there anywhere I can look up the manufacturer and model number of Firmware updates to this sort of thing please?   They are also known as Signal Network Technology Ltd, SignalC, Signal Systems etc.