Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL DS-562NC RFL Electronics Inc.
July 5, 2012 34 (973) 334-3100
Table 23. MA-428 Enhanced LAN Bridge SW2 Settings
Switch 2
Position
Name
Default
Settings
Switch Options
1 FILTER
Down
Down = Filter (bridge) off
Up = Filter (bridge) on
2 APST
1
Down
Down = Compression off
Up = Compression on
3 AUTO Down
2
Down = Auto-negotiation mode on
Up = Forced mode on
4 10/100 Down
2
Down = 100 Mbps speed
Up = 10 Mbps speed (See table 22)
5 HALF/FULL Down
2
Down = Full-duplex mode
Up = Half-duplex mode
6 DBS Down
Down = Pass broadcast frames
Up = Filter broadcast frames
7-10 - Down Switches 7 through 10 are reserved for future use.
1. APST – Automatic Pad Stripping.
2. Applicable only in forced mode (See Table 24).
Filtering
Over time the MA-428 Enhanced LAN Bridge will automatically learn and store a table with up to
10,000 MAC addresses of devices on the WAN. When the filter is on, the MA-428 Enhanced LAN
Bridge will use the MAC address table to only allow frames destined for another LAN over the WAN.
When the filter is off, all frames are sent over the WAN. RFL recommends that this setting be left in
the default (DOWN) position for optimum operation of the DS-562NC.
Compression
Compression increases data throughput. Valid Ethernet frames have a minimum length of 64 bytes.
Shorter frames are padded. With compression enabled (by asserting the APST signal), these padding
bytes are stripped off before transmission over the WAN, and re-padded while being received at the
other end. RFL recommends that this setting be left in the default (DOWN) position for optimum
operation of the DS-562NC.
Auto-negotiation and Forced mode
Auto-negotiation can be selected for the port so that the fastest bandwidth is always selected. The
following table gives all the combinations of auto-negotiation and forced mode.
Table 24. MA-428 Combinations of Auto-Negotiation and Forced Modes
Auto SW2/3 10/100 SW2/4 Half/Full SW2/5 Function
Down N/A N/A Auto-negotiation 100 FD
Up Down Down 100 Mbps speed and full-duplex mode
Up Down Up 100 Mbps speed and half-duplex mode
Up Up Down 10 Mbps speed and full duplex mode
Up Up Up 10 Mbps speed and half duplex mode
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