Ericsson MINI-LINK TN R4 ETSI - Page 34

Technical Description
SXU3 B allows Ethernet to be mapped into VCs for transportation over
one or multiple STM-1s
3.6.2 LTU 155
There are three versions of the LTU 155:
LTU 155e
Provides one electrical interface (G.703), mapping 63xE1.
LTU 155e/o
Provides one optical interface (short haul S-1.1) and one
electrical interface (G.703), mapping 63xE1. Note: only
one at a time.
LTU B 155
Provides one optical interface (short haul S-1.1) and one
electrical interface (G.703), mapping 21xE1. Note: only
one at a time.
The LTU 155 fits in all subrack types.
The STM-1 interface on LTU 155s can be equipment and line protected using
MSP 1+1, see Section 3.10.3 on page 56.
TX OPT. RX
RX
TX
EL.
ERICSSON
LTU B 155
Caution
Invisible
Laser Radiation
When Open
Class 1 Laser
Fault
Power
BR
TX OPT. RX
RX
TX
EL.
ERICSSON
LTU 155e/o
Caution
Invisible
Laser Radiation
When Open
Class 1 Laser
Fault
Power
BR
RX
TX
EL.
ERICSSON
LTU 155e
Fault
Power
BR
Optical
8278
LTU 155e
LTU 155e/o
LTU B 155
Optical
Electrical
Electrical
Electrical
Figure 27 LTU 155
30
12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14