[Asterisk-Users] Is there a clever way to page a group of extensions?

[Patrick Lidstone (Personal e-mail)]

I want to be able to dial a 'pager' extension from an phone on my 
asterisk server, and have it ring all other extensions *except* the 
extension from which I am calling (because call waiting is enabled on 
most extensions by default) - effectively giving me the ability to 
page all other extensions from any phone. The solutions I've come up 
with so far (individual contexts for each extension or customised 
dial strings for each extensions) are pretty gruesome. Is there a 
neat way of achieving this functionality?

Thanks
Patrick