External paging

External paging device connection ESI-1000 and  ESI-600, and  ESI-50 On  either  of  these systems,  a dry-contact  overhead-paging device can be connected through the RJ-11  OH Paging  connector,  which is  located  on the front  of  the main  board faceplate just  below the  NSP’s Ethernet  connector.  Although this  is  a  six-pin connector,  only two  pairs  are needed  between  the paging  device  and the connector: •  To  pin-out  the  connector  for  normally  open  operation,  connect  the  audio  wires  to  pins  3  and 4  and the control  pair  to  pins 1  and 2. •  To  pin-out  the  connector  for  normally  closed  operation,  connect  the  audio  wires  to  pins  3  and 4  and  the control  pair  to  pins 5  and 6. ESI-200 and  ESI-100 A dry contact  overhead-paging  device  can  be  connected to  the  system  through the first  port  card's  66  block.1 The overhead  paging  port  is  fixed (located  on the  main  board)  as  code  599 for  programming  purposes  and user  access.  (See  “Worksheet”  wiring  charts,