I have a customer that is looking to upgrade to a SMB phone system from Cisco using a SPA9000 and SPA 400. They need to have a paging system in place so they can dial an extension to the speaker and alert the warehouse staff if needed. Only 1 way paging is needed. I am looking for input as to what system would work the best for them. I am looking at needing at least 2 bullhorn style speakers for the size of the warehouse they are building. All the questions I can find concern existing systems and I need help finding a new one. Any advice/guidance would be appreciated. Thank you.