Options

Switches for circuit type and beep tone control how the interface functions. Option switch location illustrations for the 8410D03A and 8434 sets are shown below. Other sets are similar. On some sets, removing the desktop stand may be necessary to set the options or connect the line cord. Once the connection is made and the options are set, the desktop stand can be replaced.

• Circuit type

  The MI8400 connects between the voice terminal and the PBX, allowing the recorder audio to use existing spare conductors in the line cord. Pair 1 is the recorder audio on a 4-wire circuit pack. Pair 2 is the recorder audio on a 2-wire circuit pack. Determine which circuit pack you are connecting to and set the circuit type switch to match it. It is important to set this option before the voice terminal is plugged into the line cord. The default is 2-wire.

• Beep tone

  The toggle switch is used to enable or disable the beep tone generator. The default setting is on.

• Option switch locations

  

Connections

Since the MI8400 uses the original line jack on the set, connect the line cord to the new modular line jack. The new jack retains all the same connectivity as the original jack, plus it provides the analog audio output for recording.

• New line jack wiring tables

  Select a circuit pack type to view the wiring table for the new modular line jack.

  2-wire circuit pack connections

  4-wire circuit pack connections

• Audio output jack

  You can connect to a recorder direct from this jack. Depending on the set type, the jack may be on the rear or bottom of the set.

Specifications

MI8400
GENERAL	Size	3.3"L x 2.3"W x 0.71"H
	Weight	1.5oz
	Operating voltage	5vdc
	Power consumption	9.8mA
OUTPUTS	Audio output	-0dB (+-1dB)
	Beep tone	1400Hz; 200ms burst; 15 sec. interval.
INCLUDED ITEMS	1ea. MA1 cable	3ft length. 1/8" mini-phone plug to 1/8" mini-phone plug.