Chapter 4: Installing the Switch

4.11 1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, we recommend that for all critical connections, or any new cable installations, you use Category 5e or Category 6 cable. The Category 5e and 6 specifications include test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3-2005 standards.

4.12 1000-Mbps Gigabit Ethernet Collision Domain

Table 4-3. 1000-Mbps Gigabit Ethernet collision domain.

Maximum 1000BASE-T Gigabit Ethernet cable domain.

Cable Type

Maximum Cable Length

Connector

 

 

 

 

 

Category 5, 5e, or 6

328 ft. (100 m)

RJ-45

 

100-ohm UTP or STP

 

 

 

 

 

 

 

Maximum 1000BASE-SX Gigabit fiber cable length.

 

 

 

 

 

Fiber Size

Fiber Bandwidth

Maximum Cable Length

Connector

62.5-/125-micron

160 MHz/km

722 ft. (220 m)

LC

multimode fiber

200 MHz/km

902 ft. (275 m)

 

 

 

 

 

 

 

50-/125-micron

400 MHz/km

1641 ft. (500 m)

LC

multimode fiber

500 MHz/km

1805 ft. (550 m)

 

 

 

 

 

 

 

Maximum 1000BASE-LX/LHX/XD/ZX Gigabit fiber cable length.

 

Fiber Size

Fiber Bandwidth

Maximum Cable Length

Connector

 

 

 

 

9-/125-micron

N/A

6.2 miles (10 km)

LC

single-mode fiber

 

 

 

1310 nm

 

 

 

9-/125-micron

N/A

18.64 miles

LC

single-mode fiber

 

(30 km)

 

1550 nm

 

31.06 miles

 

 

 

 

 

 

(50 km)

 

Maximum 1000BASE-LX Single Fiber Gigabit fiber cable length.

 

 

 

 

 

Fiber Size

Fiber Bandwidth

Maximum Cable Length

Connector

Single-mode

N/A

12.42 miles (20 km)

BIDI LC

TX: 1310 nm

 

 

 

RX: 1550 nm

 

 

 

 

 

 

 

Single-mode

N/A

12.42 miles (20 km)

BIDI LC

TX: 1550 nm

 

 

 

RX: 1310nm

 

 

 

 

 

 

 

100-Mbps Fast Ethernet collision domain.

 

 

Cable Type

Maximum Cable Length

Connector

 

 

 

 

 

Category 5, 5e or 6

328 ft. (100 m)

RJ-45

 

100-ohm

 

 

 

UTP or STP

 

 

 

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Black Box LGB5128A quick start 11 1000BASE-T Cable Requirements, 12 1000-Mbps Gigabit Ethernet Collision Domain

LGB5128A, Black Box SFP Managed Switch Eco specifications

The Black Box LGB5128A, known for its robust design and advanced capabilities, is a standout component in the realm of network switches. Specifically, it is a managed switch that brings forth a spectrum of features tailored to enhance performance for various networking needs. Built to accommodate the demands of modern enterprises, the LGB5128A combines efficiency with scalability.

At its core, the LGB5128A is equipped with 28 ports, featuring a combination of 24 Gigabit Ethernet ports and 4 specialized SFP (Small Form-factor Pluggable) ports. This configuration allows users to enjoy flexibility in connectivity options, supporting copper and fiber connections. Its ability to seamlessly integrate into existing infrastructures makes it an ideal choice for businesses planning to expand their networks without a complete overhaul.

One of the defining features of the Black Box LGB5128A is its managed switch capabilities. Administrators can easily configure, monitor, and manage the network through a user-friendly interface. This includes web-based management, Command Line Interface (CLI), and SNMP support, providing multiple layers for network management. Advanced features such as VLAN, QoS (Quality of Service), and Link Aggregation ensure that data traffic is efficiently handled and prioritized, improving overall network performance.

The LGB5128A also emphasizes security with features like 802.1X port-based authentication, providing a robust framework to prevent unauthorized access. Moreover, it supports IGMP snooping, which optimizes multicast traffic, ensuring that bandwidth is used effectively. Another important characteristic is its redundancy support, including Rapid Spanning Tree Protocol (RSTP), which reinforces network reliability and uptime.

In terms of technological advancements, the managed switch incorporates features such as Power over Ethernet (PoE) capabilities in some models, enabling seamless power delivery to connected devices. This is particularly beneficial for powering devices like IP cameras and VoIP phones without the need for additional power sources.

Overall, the Black Box LGB5128A managed switch stands out in the networking landscape with its extensive features, security measures, and scalability options. Its blend of performance, flexibility, and management capabilities makes it an exceptional choice for businesses aiming to enhance their networking infrastructure while ensuring peak performance and security.