Having finally decided to install a burglar alarm I purchased a used Pyronix Enforcer. It currently comes with a PSTN dialler which I would like to swap for a GSM one. Does anyone know if the Digi-GSM is compatible with older versions of Enforcer? Mine was made in 2011 so I think it is one of the first generation. The software is "Rev. V1.02g 001BA9 Enforcer". For what I have read the GSM module needs an internal power connector. Mine does not have one.