Keyrings.

[Niall]

]

Unless its a conventional system and not an intelligent one....... and then as long as you replace the head properly there won't be any problem, clearly you should test it once installed to make sure that it is working correctly though

Analogue addressable you mean?
Yeah if it's a conventional then you just have to test it to ensure it works. . Plus I can't see a hospital running a conventional system lol