SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 9
Connection to a multiplexer
E
O
PU3f
FOM
Slot PU3f Slot FOx
Slot PU3f
FOM
SWT 3000 FOB
<3km
C
o
n
v
e
r
t
e
r
RS422
DLE
Power Supply
Interface
converter
X.21
or
G.703.1
or
G.703.6
A
d
a
p
t
e
r
Figure 3: Connection of the SWT 3000 via optical fibre to a FO Box.
The SWT 3000 is operating via optical fibre and a fibre optic box (FOB) for the interface conver-
sion with a PDH- or SDH-Multiplexer. For each transmission direction a separate fibre is neces-
sary. The FOBox contains the FOM module with the electrical/optical conversion, the interface to
the multiplexer and a power supply.
An adaptor is installed for the conversion from the system connector to the alarm relay, the con-
nectors for the digital interface (X.21/G703.1/G703.6) and the power supply connector.
Fibre optic module: SFP-Module
Fibre type:
multi mode with modules using 850nm wave length, single mode with
modules using 1300nm wave length
Wave length: 850 nm or 1300 nm
Opt. connector: LC-connector
Range: approx. 3 km at 1300nm, 550m at 850nm (depending on module type).
LED receiver alarm
2 x LED TX- and RX-Alarm (RX + F6UE-Alarm)
Digital interface X.21, G703.1 or G703.6 selectable with jumpers
Bit rate 64 kbit/s or 2 Mbit/s
Clock FOBox is DTE (for test purpose a switch over to DCE possible)
Power Supply 48 V DC (
± 20 %), potential separation 2,5 kV
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