BLACK BOX LGB408A-R2 8-Port Gigabit Unmanaged Switch User Manual
- June 6, 2024
- BLACK BOX
Table of Contents
BLACK BOX LGB408A-R2 8-Port Gigabit Unmanaged Switch User Manual
Trademarks Used in this Manual
Black Box and the Double Diamond logo are registered trademarks of BB Technologies, Inc.
Mac is a registered trademark of Apple Computer, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
FCC and IC RFI Statements
FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Specifications
-
Approvals — FCC Class A, CE
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Buffer Memory — RAM: 3.5 MB per device
-
Filtering/Forwarding Rate — 10-Mbps ports: 14,880 pps,
100-Mbps ports: 148,800 pps,
1000-Mbps ports: 1,488,000 pps -
Flow Control — Full-duplex mode: IEEE 802.3x;
Half-duplex mode: Backpressure -
JUMBO Frames — Supports 9 KB
-
MAC Address — 8K MAC addresses
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Network Transmission Media — 10BASE-T CAT3, 4, or 5 UTP/STP; 100BASE-TX CAT5 UTP/STP; 1000BASE-T CAT5 UTP/STP
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Standards Compliance — IEEE 802.3 10BASE-T; IEEE 802.3u 100BASE-TX and IEEE 802.3ab 1000BASE-T copper over Ethernet
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Connectors — (8) integrated RJ-45 ports (10-/100-/1000-Mbps)
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Indicators — (17) LEDs: (1) Power, (8) 1000M, (8) Link/Act.
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Temperature Tolerance — Operating: 32 to 104° F (0 to 40° C); Storage: -4 to +194° F (-20 to +90° C)
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Relative Humidity — 10–90%, noncondensing
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Power — Input: 100–240 VAC, 50–60 Hz; Consumption: 15 W (max.)
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Size — 1.7″H x 4.8″W x 8.9″D (4.4 x 12.3 x 22.8 cm)
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Weight — 2 lb. (0.9 kg)
Overview
Introduction
The Switch provides eight 10-/100-/1000-Mbps RJ-45 ports. It was designed for easy installation and high performance in an environment where traffic on the network and the number of users increase continuously. With its Gigabit chip set, the 9″ Gigabit Ethernet Switch can fully support the highest speed even when fully loaded and running in full-duplex mode.
The switch also provides automatic crossover detection functionality on each port. It’s easy to uplink to another switch without crossover cable.
This quiet switch operates without a fan.
The compact rigid desktop size was specifically designed for Remote Office and Branch Office (ROBO) and medium to large workgroups. You can install the switch where space is limited. It provides smooth network migration and easy upgrades to network capacity. The 9″ size can be rackmounted on a 10” or 19” cabinet.
Features
- Complies with the IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet and IEEE 802.3ab Gigabit Ethernet standards.
- Provides eight 10-/100-/1000-Mbps Gigabit switching ports.
- Performs full wire-speed switching with Head of Line (HOL) blocking prevention.
- Provides non-blocking and non-head-of-line blocking full wire-speed forwarding.
- Supports store-and-forward operation.
- Has embedded 3.5 MB SRAM for packet buffer.
- Supports 9 KB JUMBO frames.
- Provides 8sK MAC address entry.
- Supports broadcast storm filtering.
- All ports provide Auto-Negotiation and Auto-MDI/MDI-X functions.
- Supports flow control: backpressure for half-duplex and IEEE 802.3x for full-duplex mode
- Includes (17) LEDs: (1) Power, (8) 1000M, and (8) Link/Act.
- Configurable to 10-Mbps full-/half-duplex, 100-Mbps full-/ half-duplex and 1000-Mbps full-/half-duplex for each port.
- 9” inch compact size, rackmountable to 10″ and 19″ with bracket.
What’s Included
Your package should contain the following items. If anything is missing or damaged, contact Black Box Technical Support at 724-746-5500 or info@blackbox.com.
- (1) 8-Port Gigabit Unmanaged Switch
- (1) AC power cord
- (2) 19″ rackmounting brackets
- This user’s manual
Hardware Description
Front Panel
Figure 2-1 shows the front panel of the switch. Table 2-1 describes its components.
Table 2-1. Front panel components.
| Number | Name | Description |
|---|---|---|
| 1 | Power LED | Lights when power to the unit is on. |
| 2 | (8) 1000M LEDs | On when port is operating at 1000 Mbps. Off when port is |
operating at 10 or 100 Mbps.
3| (8) Link/Act. LEDs| On when there is a valid link to the corresponding
port. Flashing when data is activating.
4| (8) RJ-45 switching ports| Link to 10BASE-T, 100BASE-TX, and
1000BASE-T devices. Automatically sense 10/100/1000M speed and negotiate full-/ half-duplex mode.
Back Panel
Figure 2-2 shows the back panel of the switch. Table 2-2 describes its components.
Table 2-2. Back panel components.
| Number | Name | Description |
|---|---|---|
| 5 | 3-prong receptacle | Insert 90–240-VAC, 50-/60-Hz power supply cord here. |
Installation
Connecting the Switch to PCs, Servers, and Other Network Devices
Use straight-through twisted-pair cable (CAT5) to connect the Switch to PCs, servers, and other network devices. See Figure 3-1.
Figure 3-1. Connecting to PCs, servers, and other network devices.
Connecting the Switch to a Switch or a Hub
Use the straight-through twisted-pair cable to connect the switch to another switch or hub on the uplink port.
Application Diagram
Operation
Figure 4-1 shows the LEDs on the switch’s front panel. Table 4-1 describes their functions.
Figure 4-1. LEDs on front panel of switch.
| Number | LEDs | Status | Description |
|---|---|---|---|
| 1 | (1) Power LED | ON | Power is on |
| 2 | 8 (1–8) 1000-Mbps LEDs | ON | Link is running at 1000 Mbps. |
| OFF | Link is running at 10/100 Mbps. | ||
| 3 | 8 (1–8) Link/Act. | ON | Link is established. |
| Flashing | Data is activating. |
Appendix. Troubleshooting
Contacting Black Box
If you determine that your 8-Port Gigabit Unmanaged Switch is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box Technical Support at 724-746-5500 or info@blackbox.com.
Before you do, make a record of the history of the problem. We will be able to provide more efficient and accurate assistance if you have a complete description, including:
- the nature and duration of the problem.
- when the problem occurs.
- the components involved in the problem.
- any particular application that, when used, appears to create the problem or make it worse.
Shipping and Packaging
If you need to transport or ship your 8-Port Gigabit Unmanaged Switch:
- Package it carefully. We recommend that you use the original container.
- If you are returning the unit, make sure you include everything you received with it. Before you ship for return or repair, contact Black Box to get a Return Authorization (RA) number.
About Black Box
Black Box provides an extensive range of networking and infrastructure products. You’ll find everything from cabinets and racks and power and surge protection products to media converters and Ethernet switches all supported by free, live 24/7 Tech support available in 60 seconds or less.
Customer Support
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
877-877-2269 or fax
724-746-0746
Web: www.blackbox.com
Email: info@blackbox.com
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