Ericsson RBS 2106 Reference Manual page 109

5.6.1 Cascading
Figure 44
RBS 2106 can be cascaded; that is, time slots which are not used by
one base station are sent forward - cascaded - to the next base station
on the same BSC transmission line.
The cable from the previous and to the next base station in the chain is
connected through four PCM cables.
Table 51
PCM Cable
120
5.6.2 Interfaces and Connections
The network interfaces E1 (2 Mbit/s, 120 or 75
100
and T1; they are connected to the cabinet via a screw terminal that
includes an impedance converter.
E1/120
T1/DS1 offer multi-vendor compatibility on the transmission level.
Normally they both offer only short haul interfaces, allowing loss up to
6 dB. The Long Haul feature allows for 30 dB loss, and a more
efficient transmission network configuration.
75
Haul. The distance allowed between units is determined by the cable
loss, according to the 6 dB receiver sensitivity specified in G.703.
5.6.3 Optional Expansion Unit (OXU)
Additional transmission equipment such as the Mini-DXC or DXX can
be housed in the Optional Expansion Unit (OXU) positions in the PSU
subrack. The Mini-DXC or DXX plug-in has the functionality of a
EN/LZT 720 0008 P2A
2001-11-28
BSC
BSC
Next RBS
Cascade connections
PCM Cable for cascade connection
) are supported. The same physical ports are used for both E1
and T1/100 transmission support Long Haul. E1/G.703 and
is only available for E1 operation, and does not support Long
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Product Data RBS 2106
RBS 1
G703-1
G703-2
G703-3
G703-4
RBS 2
G703-1
G703-2
G703-3
G703-4
Product Number
RPM 513 1505/1+
) and T1(1.5 Mbit/s,
P007503A
107 (485)