X files level of paranoid thinking again.
It's irrelevant the make model of the signalling. If it is using GPRS I know how to defeat it and landline is the same. Doesn't matter if it is csls, Redcare or webway so if I wanted to do over one of your customers the actual brand you use is irrelevant. Defeating it is all the same.
Seen as you know we use MAS, webways, Redcares and soon to be dualcoms. How does this top secret information assist you?