Steve B Posted February 4, 2012 Report Share Posted February 4, 2012 I am bidding on a project with an existing valcom PA system. I am thinking of using a single port Grandstream or other FXS adapter to tie in to the system. Has anyone done something like this? I was thinking the PA1 but I don't think it will work, has anyone done this? Quote Link to comment Share on other sites More sharing options...
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