If they have spare analog ports you can connect a Bogen TAM-B unit that provides paging access by detecting analog ring voltage . The output of the TAM-B is 600 ohms and if adjusted properly will have no disconnect issues . If they have a spare ls/gs port a valcom unit can be used if the battery return option is switched on . This depends on of course what ancillary devices are installed in the IP switch .


Let It Be , I live in a Yellow Submarine . SCCE