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MultiFRAD User Guide
E&M Jumper Block Positioning Procedure (FR221/V2
Only)
Each voice/fax channel on the FR221/V2 has a separate E&M jumper block, located near the
channel jacks on the back panel of the MultiFRAD. Each jumper block has 8 pairs of pins with a
jumper plug on three adjacent pairs of pins. The E&M type numbers are labeled on the printed circuit
board, and the jumper plug needs to be centered on the E&M type number corresponding to type of
E&M connection used on that channel (1 or 2). Perform the following procedure if it is necessary to
move the E&M jumper block from its default (Type 2) position.
1
Ensure that the external power supply is disconnected from the MultiFRAD.
2
Turn the MultiFRAD upside down and remove the two cabinet mounting screws midway back
along both edges of the bottom of the cabinet.
3
Turn the MultiFRAD right side up, then slide the base out the rear of the cabinet.
Note: To change a jumper position, lift the jumper plug up off the jumper block, then move it to the
new position, ensuring that the middle jumper of the jumper block is centered on the E&M type
number (1,3; 4; or 5). See Figure 2-6.
Figure 2-6. E&M Jumper Block Positions
4
Change the jumper block position for any voice/fax channel to be connected to an E&M trunk that
is not a Type 2 (the default position).
5
Slide the base all the way into the cabinet until it stops.
6
Turn the MultiFRAD upside down and replace the two cabinet mounting screws that were
removed in step 2.
7
Turn the MultiFRAD right side up, then return to Cabling Your MultiFRAD (FR221/V2 Only).
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