AJP72

Hello I have an Ademco Vista, I need to replace it. We have a 4 bed house, probably about 7 PIR's. What kind of system can I put in to replace it? I'm not sure what type the bell box is, maybe you can deduce that from the panel name. Currently connected to the Vista is receiver and speaker which is used with a IR/Radio keyfob to arm/disarm. Ideally we'd like to replace that with a similar system, and additionally put in a dialler. Regarding diallers, is there a DECT version, our phone line is not next to the panel? Cheers Andrew