Black Box lpb201a 仕様ガイド

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Broadcast Storm — Multicast/Broadcast/Unknown-Unicast Storm suppression 
Buffer — Packet: 256 KB; Control: 128 KB 
MAC Addresses — 8K 
Management — SNMP v1, v2c; MIB-II; RMON MIB 
Port Mirroring — Support for 1:N RX port mirroring; 

Port sniffer: TX Monitor Mode, RX Monitor Mode, and TX-RX Pair Monitor 

Mode

QoS Supported — Port-based (VIP port); 802.1p, IP TOS and Diffserv (IP

v.4/v.6) based packet classification; with four-level priority queues to
prioritize inbound and outbound traffic; WRR and strict scheduling;
priority in a Q-in-Q tag 

Standards — IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3z, IEEE 802.3x,

IEEE 802.1q, IEEE 802.1w, ANSI/IEEE 802.3 autonegotiation 

Switching Capacity — Non-blocking, wire-speed performance; maximum

throughput of 8.8 Gbps 

VLAN Capabilities — Port-based VLANs; IEEE 802.1q tag-based VLANs, up to

256 active VLANs; Q-in-Q for enabling subscriber aggregation 

CE Approval — Yes 
Connectors — (24) RJ-45; (2) SFP/RJ-45 
Indicators — LEDs: Per Unit: (1) CPURUN, (1) POWER, (1) ACT, (1) FDX, (1) SPD;

Per 10/100 Port: (1) LNK, (1) ACT/FDX/SPD, (1) PoE-PSE ACT 

Environmental — Operating temperature: 32 to 104°F (0 to 40°C);

Humidity: 5 to 90%, noncondensing 

Power — Input: 100–240 VAC, 50–60 Hz, autosensing; 

Output: PoE with 48-VDC power through RJ-45 Pins 1, 2, 3, and 6; 

185 watts of total power up to 7.7 watts for 24 ports 

Size — 1.75"H (1U) x 17.4"W x 13.2"D (4.4 x 44.2 x 33.5 cm) 
Weight — 7.3 lb. (3.3 kg)

1/31/07
#26554

724-746-5500

   blackbox.com

PoE L2 Managed 10/100 Switch with (2) Dual-Media SFP Ports

(24) 10/100BASE-TX Ports

SFPs

155-Mbps

850-nm Multimode, LC, 300 m

1300-nm Multimode, LC, 2 km

1310-nm Single-Mode, LC, 20 km 

155-Mbps with Extended Diagnostics

850-nm Multimode, LC, 300 m

1300-nm Multimode, LC, 2 km

1310-nm Single-Mode, LC, 20 km 

1250-Mbps

850-nm Multimode, LC, 300 m

1300-nm Multimode, LC, 2 km

1310-nm Single-Mode, LC, 20 km 

1250-Mbps with Extended Diagnostics

850-nm Multimode, LC, 300 m

1300-nm Multimode, LC, 2 km

1310-nm Single-Mode, LC, 20 km 

Twisted-pair Ethernet cable, in addition to carrying data, 

can also provide electrical power to low-wattage electrical
devices through a method called Power over Ethernet (PoE). 
PoE delivers low-level power—roughly 13 watts at 48 VDC—over
CAT5 or higher copper Ethernet cable to PoE-enabled devices
such as IP telephones, wireless access points, Web cameras, and
audio speakers. 

Ethernet cable that meets CAT5 (or better) standards consists

of four twisted pairs of cable, and PoE sends power over these
pairs to PoE-enabled devices. 

In PoE mode A, power and data are sent over the same pair.

Because electricity and data function at opposite ends of the
frequency spectrum, their transmissions don’t interfere with
each other. Electricity has a low frequency of 60 Hz or less, 
and data transmissions have frequencies that can range from 
10 million to 100 million Hz. This method injects both power 
and data on pairs 3 and 6 and pairs 1 and 2.

In PoE mode B, two wire pairs are used to transmit data, 

and the remaining two pairs are used for power. This method
can be used for 10BASE-T and 100BASE-TX (which transmit data
on two pairs), but cannot be used with Gigabit Ethernet (which
uses all four pairs for data transmission).

There are two types of devices involved in PoE config-

urations: Powered Devices (PD) and Power Sourcing
Equipment (PSE). 

PDs are devices such as surveillance cameras, sensors, 

and wireless access points that operate on PoE. 

PSEs provide power to PDs over the Ethernet cable. 

PSEs include mid-span and end-span devices. A mid-span
device (often called a power injector) goes between a
network switch and a PD and puts power onto the Ethernet
cable. An end-span device is often a PoE-enabled network
switch that’s designed to supply power directly to the cable
from each port, eliminating the need for a separate switch
and power injector.

PSEs provide power in either PoE mode A or B. PDs accept

power in either mode. 

Power over Ethernet is ideal for providing power to low-

wattage network devices such as surveillance cameras, wireless
access points, and VoIP phones. Most VoIP phones made today
support PoE, enabling them to receive uninterrupted power
through the network without the need for an AC outlet for
each phone. With the addition of network backup power,
VoIP phones will continue to function even during a blackout.