Clear-Com i-Series Panels - Manual (Page 59)

7.4.7 External Dynamic Microphone Input Connector
The A3F standard XLR connector labeled “J10” is a balanced input for an external
dynamic microphone. It is not transformer isolated. Its input level is -40 dBu with a gain
adjustment range of ± 5 dB. Impedance is 200 Ohms.
Note: Dynamic microphones generate their own power while electret microphones do not. The
J10 connector cannot be modified for an electret microphone.
7.5 Connecting to an I-Series Expansion Panel
An I-series expansion panel connects to an I-series intercom panel and gives you access
to 32 additional keys. Figure 7-4 i-Series panel Expansion Panel illustrates an I-series
expansion panel. Both the basic and advanced keys on an expansion panel operate the
same as their corresponding keys on an i-Series panel.
The expansion panel is available with either five-character LCD displays or with areas for
paper labels. It connects to an i-Series panel through an RJ-45 connector on the rear
panel.
Figure 7-4 i-Series panel Expansion Panel
59 I-Series Panels User Guide