BLACK BOX
®
Provides five or eight 10-/100-/1000-Mbps
ports.
Use this palm-sized switch for small to medium workgroups.
5- and 8-Port Gigabit Ethernet Switches
LGB105A
LGB108A
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S.
call 724-746-5500) FREE technical support 24 hours a day, 7 days a
week: Call 724-746-5500 or fax 724-746-0746 Mailing address:
Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
Customer
Support
Information
Chapter 3: Typical Applications
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LGB105A
Chapter 2: Overview
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LGB105A
© Copyright 2012. Black Box Corporation. All rights reserved. Black Box
®
and the Double Diamond
logo are registered trademarks of BB Technologies, Inc. Mac
®
is a registered trademark of Apple
Computer, Inc. Any third-party trademarks appearing in this manual are acknowledged to be the
property of their respective owners.
BLACK BOX
®
FREE! Live, 24/7 T
ech Support is just 30 seconds away.
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LGB105A, version 1
FCC and IC RFI Statements
Chapter 2: Overview
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LGB105A
2. Overview
2.1 Introduction
The 5- and 8-Port Gigabit Ethernet Switches provide five or eight 10-/100-/
1000-Mbps ports. Use this palm-sized switch to add devices to small- or medium-
sized workgroups. Install it where space is limited to upgrade network capacity.
2.2 Features
• Autonegotiates 10-/100-/1000-Mbps speed and networking configurations.
• Palm-sized switch includes a plastic case.
• Autodetects full- and half-duplex modes for any port.
• Dedicated full-duplex 2000-Mbps bandwidth.
• Uses store-and-forward switching methods.
• Conforms to IEEE 802.3x standard flow control for full-duplex and backpressure
flow control for half-duplex.
• Features non-blocking and non-head-of-line-blocking full-wire-speed forwarding.
• Supports Auto MDI/MDI-X functions for any port.
• Smart plug-and-play.
2.3 What’s Included
Your package should include the following items. If anything is missing or
damaged, contact Black Box Technical Support at 724-746-5500 or
[email protected].
• 5- or 8-Port Gigabit Ethernet Switch (LGB105A or LGB108A)
• 5-VDC power adapter
• This user’s manual
2.4 Hardware Description
Figures 2-1 through 2-4 show the front and back panels of the switches. Tables 2-1
and 2-2 describe their components.
Chapter 2: Overview
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LGB105A
Chapter 2: Overview
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LGB105A
Chapter 1: Specifications
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LGB105A
1. Specifications
Buffer Memory —
1.25 MB
Certifications —
FCC Class B
Filtering/Forwarding Rates —
1000-Mbps port: 1,488,000 pps,
100-Mbps port: 148,880 pps, 10-Mbps port: 14,880 pps
Jumbo Frames —
9 K
MAC Address —
4 K
Standards —
IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3ab
1000BASE-T, IEEE 802.3x flow control
Transmission Media —
10BASE-T CAT3, 4, 5 UTP/STP;
100BASE-TX CAT5 UTP/STP, 1000BASE-T CAT5e UTP/STP
Transmission Method —
Store and forward
Connectors —
LGB105A: (5) RJ-45; LGB108A: (8) RJ-45
Indicators —
Per unit: (1) Power LED; Per port: LGB105A: (5) LINK/ACT LEDs;
LGB108A: (8) LINK/ACT LEDs
Temperature Tolerance —
Operating: 32 to 131° F (0 to 55° C);
Storage: -4 to 194° F (-20 to +90° C)
Relative Humidity —
10 to 90%, non-condensing
Power —
5 VDC power supply,
Consumption: 6 watts (max.)
Size —
0.9"H x 4.1"W x 5.5"D (2.5 x 10.5 x 14 cm)
Weight —
LGB105A: 0.42 lb. (0.19 kg);
LGB108A: 0.48 lb. (0.22 kg)
2 3
Figure 2-1. Front panel of the LGB105A switch.
1
Figure 2-2. Back panel of the LGB105A switch.
NOTE: The power connector (#4 in Table 2-1) is located on the switch’s side panel (not shown).
Table 2-1. LGB105A switch components.
Number
Component
Description
1
(5) RJ-45 connectors
Link to 10/100/1000BASE-T devices
2
(1) Power LED
Lights when power to the unit is on.
3
(5) Link/Act LEDs
On when a connection is present
Off when there is no connection.
Flashing when data is present.
4
(1) power connector
Connects to the 5-VDC external power supply.
2 3
Figure 2-3. Front panel of the LGB108A switch.
1
Figure 2-4. Back panel of the LGB108A switch.
NOTE: The power connector (#4 in Table 2-2) is located on the switch’s side panel (not shown).
Table 2-2. LGB108A switch components.
Number
Component
Description
1
(8) RJ-45 connectors
Link to 10/100/1000BASE-T devices
2
(1) Power LED
Lights when power to the unit is on.
3
(8) Link/Act LEDs
On when a connection is present
Off when there is no connection.
Flashing when data is present.
4
(1) power connector
Connects to the 5-VDC external power supply.
3. Typical Applications
Connect PCs, servers, and other network devices to the switch via a straight-through CAT5e or
better patch cable.
Mac
®
PC Workstation PC PC Server Server PC PC
LGB108A
Fast Ethernet
Switch
Dual-speed
switch
Fast Ethernet
Switch
Figure 3-1. Configuration using the LGB108A switch.
PC
Mac Server Workstation
LGB108A
Figure 3-2. 10/100/1000BASE-T devices connected to a LGB108A switch.
FEDERAL COMMUNICATIONS COMMISSION
and INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
Class B Digital Device.
This equipment has been tested and found to comply with the limits for a Class
B computing device pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. However, there is no
guarantee that interference will not occur in a particular installation. This equipment generates, uses,
and can radiate radio frequency energy, and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. If this equipment does cause harmful
interference to radio or telephone reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outley on a circuit different from that to which the receiver
is connected.
• Consult an experienced radio/TV technician for help.
CAUTION: Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
To meet FCC requirements, shielded cables and power cords are required to connect this device to a
personal computer or other Class B certified device.
This digital apparatus does not exceed the Class B limits for radio noise emis sion from digital apparatus
set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux
appareils numériques de classe B prescrites dans le Règlement sur le brouillage radioélectrique publié par
Industrie Canada.
