The VDRM100 voice detect and relay module provides a fast operating relay that activates in response to a voice signal on the associated transmission circuit or in response to an external ground. When optioned for voice activated relay control, the module can be adjusted to respond to minimum speech levels as low as -45dbm or as high as 0dbm. The VDRM100 is used in applications requiring switched response to the presence of speech or voice band energy or ground potential in the ground activated mode, for control of external equipment. Because it is not part of the transmission path, the VDRM100 can be used in either 2wire or 4wire circuits.
A yellow idle indicator on the front panel should be on when power is applied and the circuit is idle. Whenever the relay operates in the Vox or Answer mode the idle indicator will turn off.
