ARIA SOHO Hardware Description and Installation Manual
Issue 1
TERMINAL CONNECTION AND WIRING METHOD
Aug, 2006
49
5.1.3.1 External Music Source Wiring
The MBU accommodates one external music port through a PJ1 (RED) audio jack.
5.1.3.2 Relay Contacts
The MBU/EMBU provides 1 relay contact that is used for loud bell or general purpose through pin No. 4-5 of MJ3.
5.1.3.3 External Paging Port wiring
The MBU supports one external paging port through a PJ2 (BLUE) audio jack.
5.1.3.4 Alarm Detection Wiring
The MBU/EMBU provides an external alarm detection input, which can be used to transmit notification to extensions
when the external switch is closed or opened (programmable through Admin Programming). This alarm detection
input is provided through Pin No. 2-3 of MJ3.