
CX900e Hardware Reference Manual
19-4
3006M100-002
The following table describes jumper settings for the correct line impedance fo
E1 through either the RJ-48 or the BNCs.
* Installing these jumpers at LK7 and LK8 will connect the BNC Ring terminal to
Frame Ground.
Table 19-2 T1 Line Impedance
Jumper
Port
T1 RJ-48 (100 Ohms) Configuration
LK2
T1 Transmit
Connect pin 1 to 2
LK3
T1 Transmit
Connect pin 1 to 2
LK5
T1 Receive
Connect pin A1 to B1
LK6
T1 Receive
Connect pin A1 to B1
LK7
T1 Transmit
Remove Jumper
LK8
T1 Receive
Remove Jumper
Table 19-3 E1 Line Impedance
Jumper
Port
RJ-48 (120 Ohms) Configuration
BNC (75 Ohms) Configuration
LK2
E1 Transmit
Connect pin 2 to 3
Connect pin 2 to 3
LK3
E1 Transmit
Connect pin 2 to 3
Connect pin 2 to 3
LK5
E1 Receive
Connect pin A2 to B2
Connect pin A3 to B3
LK6
E1 Receive
Connect pin A2 to B2
Connect pin A3 to B3
LK7
E1 Transmit
Install Jumper
Install Jumper*
LK8
E1 Receive
Install Jumper
Install Jumper*
Figure 19-3 T1/E1 CSU/DSU Configuration Jumper
Summary of Contents for CX900e
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