Reference Manual

Product Data RBS 2106
5.6.1 Cascading
P007503A
RBS 2
RBS 1
BSC
Next RBS
BSC
G703-1
G703-2
G703-3
G703-4
G703-1
G703-2
G703-3
G703-4
Figure 44 Cascade connections
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 for cascade connection
PCM Cable Product Number
120 
RPM 513 1505/1+
5.6.2 Interfaces and Connections
The network interfaces E1 (2 Mbit/s, 120 or 75
 ) and T1(1.5 Mbit/s,
100
 ) are supported. The same physical ports are used for both E1
and T1; they are connected to the cabinet via a screw terminal that
includes an impedance converter.
E1/120
 and T1/100  transmission support Long Haul. E1/G.703 and
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
 is only available for E1 operation, and does not support Long
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
107 (485)
© Ericsson Radio Systems AB
— All Rights Reserved —
Preliminary