Technical data

FL SWITCH SFN ...
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PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany
Phone: [phone] • Fax: [phone]
www.phoenixcontact.com
Switching Characteristics of the FL SWITCH SFN ...
– Store and Forward
All data telegrams that are received by the switch are
saved and their validity checked. Invalid or faulty data
packets (> 1522 bytes or CRC errors) and fragments
(< 64 bytes) are rejected. Valid data telegrams are for-
warded by the switch. The switch always forwards the
data using the data transmission speed that is used in
the destination network segment.
– Multi-Address Function
The switch independently learns the addresses for ter-
mination devices, which are connected via a port, by
evaluating the source addresses in the data telegrams.
Only packets with unknown addresses, with a source
address of this port or with a multicast/broadcast ad-
dress in the destination address field are forwarded via
the corresponding port. The switch can store address-
es in its address table with an aging time of 5 minutes.
This is important when more than one termination de-
vice is connected to one or more ports. In this way, sev-
eral independent subnetworks can be connected to
one switch.
– Quality of Service (QoS): IEEE 802.1P/Q
The SFN switches are capable of reading Ethernet
packets that have already been assignent a priority lev-
el by a managed switch or other. In cases of heavy traf-
fic, packets with a priority 4-7 are considered high
priority and processed before packets with 0-3 priority
level. After prioritization the packets are forwarded
without modification.
Housing Dimensions
Figure 9 Housing dimensions for the FL SWITCH SFN ...
© PHOENIX CONTACT 02/2007
A restart deletes the entire address table.
The housing depth is 70 mm for all housing versions.
X1
X2
X3
X4
FL SWITCH SFN 5TX
Ord.-No.: 2891152
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
LNK/ACT
100
X5
X1
X3
X5
X7
FL SWITCH SFN 8TX
Ord.-No.: 2891929
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
US
X2
X4
X6
X8
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
100
LNK/
ACT
14 mm
120 mm
30 mm 50 mm
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