Bit Time per Meter BT/m | GarrettCom 8000X instruction

GarrettCom 8000X manual Bit Time per Meter BT/m

Magnum 8000X Mixed-Media Fiber Hubs	Installation and User Guide (05/ 02)

4.For Port #1, if the LINK LED is not illuminated, change to port 1X. If this does not help, ensure that the cable is connected properly and that the device on the other end is powered on and is not defective.

3.6.1100Mbps Collision Domain Diameter, Cable Distances and PDV Calculations

The 100Mbps Collision Domain Diameter is the length of the longest path between any two devices in a single collision domain. A collision domain is defined as a cluster of network devices which are connected by means of a repeater or repeaters such that no bridging devices are present between any two devices in the cluster. In order to install an IEEE 802.3u compliant Fast Ethernet network, the collision domain .

. regardless of the actual network topology . . must be less than 512 BT (Bit Times). Bit Times are related to media type as shown in Table 3.6.1a.

Table 3.6.1a: Worst case round-trip delay for Fast Ethernet media*

Media Type	Round-trip delay in
	Bit Time per Meter (BT/m)
Fiber Optic	1.000
Shielded TP cable	1.112
Category 5 Cable	1.112
Category 3, 4 Cable	1.140

*Worst case delays taken from IEEE Std 802.3u-1995, actual delays may be less for a particular cable. Contact your cable supplier for exact cable specifications.

Each Fast Ethernet device component also has an associated BT delay which depends on the physical signaling system employed. Table 3.6.1b shows each Fast Ethernet device component and the associated BT delay. A “DTE” is an end node, such as a user station. Note that there is only one DTE pair associated with any device-to- device path.

Table 3.6.1b: Worst case round-trip delay for Fast Ethernet device components*

Component	Round-trip delay in Bit Times (BT)
2 TX DTEs	100
2 FX DTEs	100
1 FX and 1 TX DTE	100
1 T4 and 1 TX or FX DTE	127
Class I Repeater	140
Class II Repeater with any	92 **
combination of TX and FX ports	**Note, the delay is only 80 Bit Times for
	the 8000X, front-port-to-front-port.

*Worst case delays taken from IEEE Std 802.3u -1995.

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8000X specifications

The GarrettCom 8000X series represents a significant advancement in industrial networking technology, designed specifically for demanding environments that require robust and reliable communication solutions. Known for its versatility and resilience, the 8000X series caters to various industries, including transportation, utilities, and automation, making it a go-to choice for mission-critical applications.

One of the main features of the 8000X is its modular design, allowing users to customize the switch according to their specific networking needs. This feature provides the flexibility to add and remove modules seamlessly, ensuring that the network can adapt as requirements change over time. The modularity also contributes to easier maintenance and upgrades, reducing downtime and enhancing operational efficiency.

The 8000X series is built to operate in harsh environments, with an operating temperature range of -40°C to 85°C, making it suitable for outdoor and industrial applications. Its rugged chassis is designed to withstand vibration and shock, ensuring reliability even in the most challenging conditions.

Equipped with both Ethernet and fiber optic ports, the 8000X series supports a variety of network topologies and facilitates extensive connectivity options. It usually offers multiple gigabit Ethernet ports, allowing for high-speed data transmission. This feature is crucial for applications that demand real-time data processing, such as video surveillance and process control systems.

In terms of security, the GarrettCom 8000X series incorporates advanced features such as VLAN support, access control lists (ACLs), and network monitoring tools. These security measures are essential for protecting sensitive data and maintaining network integrity against potential threats.

The device also supports various network protocols, including IPv4, IPv6, and various industrial protocols such as Modbus. This compatibility ensures that the 8000X can seamlessly integrate into existing infrastructures and communicate effectively with other devices and systems.

Furthermore, the GarrettCom 8000X series is equipped with built-in redundancy features, such as dual power supplies and support for Rapid Spanning Tree Protocol (RSTP), which enhance network reliability and minimize the risk of downtime.

Overall, the GarrettCom 8000X series stands out with its robust construction, modularity, and advanced technology, making it an ideal solution for organizations seeking reliable networking equipment capable of performing under extreme conditions. Its features make it a vital asset for industries focused on maintaining high-performance communication standards.

Magnum 8000X Mixed-Media Fiber Hubs

Bit Time per Meter (BT/m)

8000X specifications