SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 17
Example 8:
Direct fiber optic connection between two SWT 3000 devices. SWT 3000 protection signaling in-
corporates an internal fiber optic modem for long distance trans-mission. The maximum distance
between two SWT 3000 devices is 150 km.
Example 9:
Fiber optic connection between an SWT 3000 and a MUX. A short distance connection of up to 3
km between an SWT 3000 and a multiplexer can be realized via an integrated fiber optic modem.
The multiplexer is connected with the SWT 3000’s FOBox, converting the optical signal to an elec-
trical signal.
Analog and digital transmission path
Figure 10: Examples for using analog and digital transmission path
Example 11:
Alternative transmission routes. SWT 3000 enables transmission of protection signals via two dif-
ferent routes. Both routes are constantly used. In the event that one route fails, the second route
immediately takes over without any loss of time. The digital interface (DLE) permits protection sig-
nals to be transmitted over a PDH or SDH network.
Example 12:
A short-distance connection between an SWT 3000 and Siemens’ PowerLink PLC terminal can
be realized via an integrated fiber optic modem. The multiplexer is connected with the SWT 3000’s
FOBox, converting the optical signal to an electrical signal.
Integrated into the PowerLink PLC system
Figure 11: Examples of integrated SWT 3000
Examples 13 and 14:
An SWT 3000 system can be integrated into the PowerLink equipment. Either the analog inter
face or the digital interface, or a combination of the analog and the digital interfaces, can be used.
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