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MultiFRAD 3000-Series User Guide
E&M Jumper Block Positioning Procedure
A jumper block exists for each voice/fax channel. The jumper block is to the right of each set of
channel jacks. The jumper block contains 8-pairs of pins. The jumper plug fits over three pairs of
pins on the jumper block. The E&M type number is labeled on the pc board. The jumper plug needs
to be centered on the E&M type number. Perform the following procedure to change E&M jumper
position.
1 Ensure that power is removed from the MultiFRAD.
2 Turn the unit up side down and remove the four phillips screws from the cover. Turn the unit
right side up and remove the four phillips screws from the back of the top cover.
3 Remove the front panel by loosening the two capative phillips screws. Slide the top cover
back off the chassis to expose the rear panel.
4 To change a jumper position, lift the jumper plug up off the jumper block and move to the new
position, ensuring that the center jumper is centered on the E&M type number.

4

2 (Default)

1,3

5

Figure 6. E&M Jumper Block
5 Change the jumper position for each voice/fax channel that is connecting to an E&M trunk
that is not a type 2.
6 Slide the top cover back on to the chassis. Replace the front panel and secure it by
tightening the two capative phillips screws.
7 From the back of the unit, replace the four phillips screws that secure the top cover. Then,
turn the unit up side down and replace the four phillips that secure the top cover.
8 Return to your General Cabling Connections Procedure.