11
Cabling
E&M Jumper Block Positioning Procedure
Each voice/fax channel on the MultiVOIP has a separate E&M
jumper block, located near the jacks on the back panel of the
MultiVOIP. Each jumper block has 8 pairs of pins with a
jumper plug on three adjacent pairs of pins. The jumper plug
must be centered on the E&M type number (see Figure 4) that
matches the E&M connection for that channel. Perform the
following procedure if you need to move the E&M jumper block
from its default (Type 2) position.
1. Ensure that the external power supply is disconnected
from the MultiVOIP.
2. Turn the MultiVOIP upside down and remove the cabinet
mounting screw at the center back of the cabinet.
3. Turn the MultiVOIP 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) as shown
in Figure 4.
Jumper Blocks
In Position 2
(Default)
Note: Markings do not appear on board.
Back Panel Connectors
2
2
Channel 2 Channel 1
Alternate Positions
4
5
1,3
Figure 4. E&M Jumper Block Positions