Black Box LPH240A-H, Operation Manual

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Chapter 2: Introduction
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MDIX ports to eliminate cross-over cables while cascading
All the LPH240A Series Switches are featured with MDI-X (auto-
cross), which easily allows cascading with other Switches, Hubs or
media Edges without using the cross-over cable.
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DC-Power input for PoE Power Source Switch
The 802.3af PoE standard power source switch requires 1.4 Amp-
48VDC to provide enough power for 13-15watts on each RJ-45 port.
The Terminal block for -48V DC input is a range of 46V to 60V DC.
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Hardware operated Alarm terminal block
The Alarm contact option on LPH240A enables monitoring for
internal power failure, and provides extra reliability to the hardened
Switch
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Link-Loss-Learn feature for faster recovery in redundant
network
The LLL feature qualifies the Edge switches to actively work along
with Managed redundant network structure as a client switch and
allow a faster recovery during ring break. The redundant topology
must have one managed switch with STP/RSTP feature to control
the ring.