ARIA SOHO IP Hardware Description and Installation Manual
Issue 1
TERMINAL CONNECTION AND WIRING METHOD
December, 2008
52
5.1.3 Connecting Additional Terminals
The MBU provides connections for one external music source, one external page port, one relay contact, and an
alarm detection input monitor through the PJ1 (RED, External MOH) and PJ2 (BLUE, External Page) audio jack and a
MJ3 (RJ11 Modular Jack).
FIGURE 5.1.4 ADDITIONAL TERMINAL CONNECTION
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 2 relay contact that is used for loud bell or general purpose through pin No. 1-4 of CN13.
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 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 MJ2-1 pin 3-4 of MBU.
