Ericsson HL950 CES, Быстрое руководство по установке

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Physical Interfaces 9
LIF MODULES LIF MODULES LIF MODULES LIF MODULES LIF MODULES
The LIF (Legacy Interface) modules is located at the bottom right of
the MSED/HL950. Modules can be slot in and are fastened by the
front panel screws.
Figure 11: Connectors/indicators on the LIF E1 Module
The LIF module includes either an E1 Interface Module or a Legacy
V.35/V.36/X.21 Interface Module for connection to the local network
as described in the following sections.
LIF E1 LIF E1 LIF E1 LIF E1 LIF E1
For 120 ohms balanced operation For 120 ohms balanced operation
For 120 ohms balanced operation For 120 ohms balanced operation
For 120 ohms balanced operation , connect a 120 ohms
(default strapping) twisted pair cable with four wires (2 pairs) to the
RJ45 connector.
For 75 ohms unbalanced operation For 75 ohms unbalanced operation For 75 ohms unbalanced operation For 75 ohms unbalanced operation For 75 ohms unbalanced operation , connect two 75 ohms
coaxial cables to the DIN 1.0/2.3 connectors.
NOTE! NOTE! NOTE! NOTE! NOTE! 120 ohms and 75 ohms cables cannot be connected simul-
taneously. When using 75 ohms unbalanced operation, you have to
change the strapping on the E1 card. The procedure is described on
the next page.
The RJ45 connector has two LEDs. The left LED (Carrier) lit when
receive carrier is detected and the right LED (Sync) indicates when the
board is searching for frame synchronization.
RJ45
Connector
DIN 1.0/2.3
Connectors
Figure 10: Location of the WIF slot