Aiphone IS Intercom System User Manual


 
45
GETTING STARTED USING THE SYSTEM APPENDIX
SETTING AND ADJUSTMENT
<For Canada market>
This product meets the applicable Industry Canada technical speci cations.
The Ringer Equivalence Number (REN) is an indication of the maximum number of devices allowed to be connected to a telephone
interface. The termination of an interface may consist of any combination of devices subject only to the requirement that the sum of
the RENs of all the devices not exceed ve.