Allied Telesis AT-S20 - Manual (Page 13)

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The switches have the following major software management
features:
❑ Supports industry-standard 802.1Q VLAN tagging and
supports a maximum of 32 port-based and tag-based VLANs
(XL versions only)
❑ Security (XL versions only)
❑ Backpressure (XL versions only) and transmit pacing provide
one-way flow control to relieve congested networks
❑ Port mirroring
❑ Firmware is factory-installed and ready to use
❑ User configuration for store-and-forward and cut-through
packet switching for non-XL versions; store and forward only
for XL versions
❑ Auto-negotiation on 10 Mbps and 10/100 Mbps UTP ports in
compliance with IEEE 802.3u
❑ Mulitcast address support which allows users to specify the
recipient port for multicast packets
❑ All UTP and fiber ports are software configurable for full- and
half-duplex
❑ Port B (optional uplink) can be configured as either a 10/100
Mbps UTP or a 100 Mbps fiber uplink