# Audio Connection

An audio connection from the Catalyst to the PA system can be made at RCA jack, J1 on the I/O board (mainboard) within the Catalyst enclosure.

(See the Interior View Diagram (CIG Rev D). This jack provides a line level signal output for direct connection to a PA system.

It’s important to note that with the Catalyst audio output connected to the PA system in this manner, the PA System will amplify all audio from the Catalyst. Thus, calls to other types of phone destinations plus any operator activity, like unit configuration, will be heard over the PA system. If it is undesirable to hear all Catalyst voice activity through your PA system then the multi-use Catalyst relay driver output may be utilized.