Clear-Com IF4W4 - Manual (Page 13)

I F 4 W 4 4 - C H A N N E L F O U R - W I R E I N T E R F A C E
2 - 3
CARBON MIC HEADSET EMULATION
Figure 2-6 shows the IF4W4 connections to a carbon mic headset. Local sidetone
in the four-wire device must be completely turned off.
Figure 2-6: Carbon Mic Headset Emulation
Please refer to the technical specification for further information.
IF4W4
5
INT
GND