11
Cabling
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 must be centered on
the E&M type number. To change E&M jumper position:
1. V erify that power is disconnected from the MultiVOIP.
2. Remove the front panel by removing the two Phillips
quarter turn screws.
3. Remove the six screws and slide the top cover backward 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 4. E&M Jumper Block Positions
5. Change the jumper position for each voice/fax channel
connecting to an E&M trunk that is not a type 2. If you
have two voice/fax channel boards in your unit and you
need to change the jumpers on the second board, remove
the six screws from the top board and disconnect the
ribbon cable from the top board.
6. Slide the top cover back on to the chassis and fasten the
six screws.
7. Replace the front panel and fasten the two Phillips quarter
turn screws.
8. Return to the Cabling Procedure section.