General DataComm Xedge 6000 Series, Hardware Installation

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Line Interface Modules E1-2CS and E1-4CS LIM Overview
5-20 Xedge 6000 Hardware 032R440-000
Installation & Setup Guide Issue 17
Hardware Settings
Figure 5-13 E1-2CS and E1-4CS LIM Jumper Positions
Link Type Jumper Settings
Each link on the E1-2CS or E1-4CS LIM has a group of jumpers that must be set to 75 ohms
unbalanced or 120 ohms balanced operation. The jumpers are located near their associated link
connector (
Figure 5-13 ). The two jumpers for each channel must be positioned in either the middle
row of pins (75 ohms unbalanced) or the lower row (120 ohms balanced)
TX-RX Shield Jumper Setting
On the E1 LIMs, you must ensure TX and RX jumpers are positioned properly in order to connect
TX and RX shields to chassis ground. These jumpers are located towards the center of the LIM, as
shown in
Figure 5-13 . There are four rows of six pins, one row for each Link. The left-most set pins
are the TX setting for each Link; the right-most set of pins are the RX setting for each Link.
• With the jumpers set as shown in Figure 5-13 , the TX and RX shields for each Link (DB15 pins
12 and 10, respectively) are connected to chassis ground.
• Setting the jumpers to the left and right outermost positions isolates the transmit and receive
shields, respectively, from chassis ground.
Table 5-7 E1-2CS and E1-4CS LIM Pinouts
Pin Number Signal Designation
1 Receive signal
3 Transmit signal
9 Receive return
11 Transmit return
10 Receive shield
12 Transmit shield
Link 0
Link 1
Link 2
Link 3
TX RX
Link 2 and Link 3
are only on the
E1-4CS LIMs.
Link 2
Link 3
Link 0
Link 1
75 Ohm
120 Ohm
not used