SDM-9XXX Series Hardware Installation Guide
3-14 Memotec Inc.
will be used for an E1 connection at 75 Ohms. These jumpers are required for compliance
with EMC Immunity standard EN 55024. They are provided with the card.
CAUTION: If the jumpers are not installed correctly, an E1-75 connection may
experience noise due to electromagnetic interference.
NOTE: An E1-75 connection is accomplished by installing an adaptor on the E1/T1
port. The following adaptor is available from Memotec: RJ-48 to E1-75 dual
BNC (Ordering part number AG2CA0001). If you are not using an adaptor
for E1-75 operations, you can skip this procedure.
The jumper connectors are located between the two ports (refer to
Figure 3-6):
• Port 1 (on the left when the card is viewed from the front) is governed by jumpers
installed on connector J4. This is the only jumper connector available on the
single port T1/E1 interface card.
• Port 2 (on the right) is governed by jumpers installed on connector J7.
To install jumpers for an E1-75 connection on a single/dual port T1/E1 interface
card:
NOTE: Hard strapping must be done carefully, to ensure that the pins are well-
Figure 3-6: Position of Jumper Connectors J4 and J7 on the Dual Port T1/E1 Interface Card
Port 1
Port 2
Jumper J4
Jumper J7
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