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PXES4P Switches
Switching, Address Learning
The PXES4P Series units have address table capacity of 2K node addresses, and
are suitable for use in large networks. They are self-learning, so that as nodes are added or
changed, the PXES4P Series automatically keeps up with node locations.
An address-aging algorithm causes least-used addresses to fall out in favor of new
frequently-used addresses. To reset the address buffer, cycle power down-and-up.
4.2 Auto-cross (MDIX), Auto-negotiation and Speed-sensing
The RJ-45 ports support auto-cross (MDI or MDIX) in the auto-negotiation
mode according to the IEEE 802.3u standard. No crossover cables are needed when
connecting the PXES4P to other unmanaged switches, legacy hubs, managed switches,
media-converters etc. Please note that there can be conditions with managed switches
where the switch manager fixes the port settings via software, and the result of the
auto-negotiation is changed in the managed switch by the manager commands. In such
PXES4P Switches
cases, the 10/100 speed or the F/H mode may be affected, but auto-cross in the
PXES4P Switches will still work. The auto-cross function cannot be disabled.
When an RJ-45 cable connection is made, and each time LINK is enabled,
auto-negotiation takes place (except for legacy products, which do not have auto-
negotiation and which go to the default state accordingly). The Switch advertises its
capability for 10 or 100 Mbps speed and F/H duplex mode, and the device at the other
end of the cable should similarly advertise / respond. Both sides will agree to the speed
and mode to be used per the IEEE 802.3u standard. Depending upon the devices
connected, this will result in agreement to operate at either 10 Mbps or 100Mbps speed,
and full- or half-duplex mode.
4.3: Dual LEDs, Front-panel and side-panel (PXES4P Series)
LED
Description
PWR
Illuminates GREEN to indicate power applied.
PXES4P Switches
LK/ ACT Steady ON for LINK w/no traffic, blinking for activity per port. LINK will turn
off in the event connectivity is lost between the ends of the twisted pair segment
or a loss of power occurs in the unit or remote device. The Link ports are also
represented by LA1, LA2, LA3, & LA4. (Steady On or steady Off indicates no
Receive Activity).
10/100
Steady ON for 100Mb speed, OFF for 10Mb speed per port
F/H
Steady ON for Full duplex mode, OFF for half duplex per port
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