Comtech EF Data SDM-9220 User Manual
Page 57
Hardware Installation
Memotec Inc.
4-15
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 (Part No. 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
•
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 4-5: Position of Jumper Connectors J4 and J7 on the Dual Port T1/E1 Interface Card
Port 1
Port 2
Jumper J4
Jumper J7