ETL600 1KHW001489-EN ABB Switzerland Ltd
case of a noisy line, Reed Solomon (=RS) forward error correction
may be enabled.
• Narrowband interference detection:
When narrowband interferers are present in the MOD600
frequency band, data throughput may be increased by enabling
narrowband interference detection. Upon startup of the
communication, the frequencies of narrowband interferers are
detected and in the sequel no longer used by MOD600. This allows
to spend more power to the frequencies not impaired by
narrowband interferers. ABB has filed a patent for this method.
The signal converter is equipped with one interface which can be
routed directly to V.11 port 1 or to the DPLC channel multiplexer of
MUX600.
3.5.3. MUX600 DPLC Channel Multiplexer and V.24 Port Sharing
MUX600 consists of a DPLC channel multiplexer for transmission of
individual channels over one aggregate channel on MOD600 modem,
a Port Sharing Device for channel sharing of up to four V.24 ports and
some switches for assignment of the V.24 ports to NSK600 modems
or the DPCL channel multiplexer.
V.11 Port 2
V.11 Port 1
V.24 Port 1
V.24 Port 3
V.24 Port 2
V.24 Port 6
V.24 Port 5
V.24 Port
Sharing
Device
G.703 Port 1
NSK600 Modem 1
NSK600 Modem 2
NSK600 Modem 3
NSK600 Modem 4
DPLC Channel
Multiplexer
MOD600 Modem
V.24 Port 4
MUX600
Legend for
Switches:
1) Port assignment: to MUX600/(MOD600) / Off
2) Port assignment: to MUX600 / to NSK600 / Off
3) Port Sharing operation: On / Off
4) MOD600 operation: V.11 Port 1 / MUX600 / Off
1)
2)3)
4)
- off position ( : mandatory for MUX600 disable)
- default position (mandatory for MUX600 disable)
- alternate position (for MUX600 enable)
5)
5) Not supported with ETL600 Rel.1
Fig. 3-36 MUX600 Block Diagram
Structure and Function November 2005 3-49
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