User's Manual

Table Of Contents
DIB-500 R4.1 Product description
Constituents
42 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
3.1.3 Redundancy package with LAN Routing Unit (LRU)
The redundancy package with LAN Routing Unit (LRU), which is available as an option,
serves the base station DIB-500 R4.1 starting with five carriers for the redundant con-
nection of the TIB transceiver modules. If the redundancy package is used, all TIB
transceiver modules in both equipment racks are connected with the LAN Routing Unit
(LRU) via Ethernet. In this case, the LRU takes on the routing between the TIB trans-
ceiver modules.
With the ring-shaped connection of all transceiver modules in both equipment racks,
TIBs are connected with each other. If a TIP should fail, this guarantees that the con-
nection between the remaining TIBs continuous to be ensured. This also guarantees
the radio coverage of DIB-500 R4.1 even if the second, third or fourth TIB transceiver
module should fail.
The redundancy package consists of the LAN Routing Unit (LRU), a top hat rail power
supply unit as well as the voltage supply and Ethernet cables required for the installa-
tion. For operation, the LRU must be installed on the top hat rail on the first equipment
rack of the DIB-500 R4.1, see section 5.5.1 on page 96.
Figure 3.13 shows the position of the redundancy package in the top view.
Figure 3.13 Position of the redundancy package (top view)
4 "PPS" connection (pulses per second) for clock synchronisation of DIB-500 R4.1-
equipment racks (RJ-45)
5 External E1 connections to TIB A (RJ-45)
6 Port for connecting the E1 connecting cables from the E1 connection panel to TIB A
(D-sub)
7 External E1 port with connection to E1 relay (RJ-45)
8 External E1 port with connection to E1 relay (RJ-45)
9 External E1 connections to TIB B (RJ-45)
10 Port for connecting the E1 connecting cables from the E1 connection panel to TIB B
(D-sub)
Table 3.14 Legend: E1 connection board (top view)
No. Description
Table 3.15 Legend: Position of the redundancy package (top view)
No. Component
1LRU
2 Top hat rail power supply unit
1 2