Chapter 3: Installation

c.Make sure that the fiber connection meets dB loss specifications for a 100BASE-FX link as specified in the Cabletron Systems Cabling Guide.

d.See Section 5.19 for information on how to manage the connected port.

If a link has not been established, refer to Chapter 4, before contacting the Cabletron Systems Global Call Center. Refer to Section 1.7 for help if the problem has not been resolved.

3.4.2Connecting a Twisted Pair Segment to the FE-100TX

NOTE

To ensure proper operation, use only Category 5 Unshielded Twisted Pair (UTP) cabling that has an impedance of 85 to 111 ohms.

An FE-100TX installed in port 7 and/or 8 has an internal crossover switch, which acts like a crossover cable. A schematic of a crossover cable is shown in Figure 3-3.

NOTE

RX+/RX- and TX+/TX- must share a common color pair. For example, the receive pair may use the white/blue, blue/white pair, while the transmit pair may use the white/orange, orange/white pair.

SmartSwitch RJ45 Port

10BASE-T Device Port

RX+

1

 

 

 

 

 

 

 

 

1

RX+

RX–

2

 

 

 

 

 

 

 

 

2

RX–

TX+

3

 

 

 

 

 

 

 

 

3

TX+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX–

6

 

 

 

 

 

 

 

 

6

TX–

 

 

 

 

 

 

RJ45 to RJ45

 

 

 

2159_04

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 3-3 Cable Pinouts - (RJ45) Crossover Cable

3-8

6H128-08 and 6H129-08 User’s Guide

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Image 34
Cabletron Systems 6H129-08, 6H128-08 Connecting a Twisted Pair Segment to the FE-100TX, Cable Pinouts RJ45 Crossover Cable

6H129-08, 6H128-08 specifications

Cabletron Systems was a notable provider of networking hardware in the 1990s, specializing in solutions that enabled enterprises to build robust and scalable networks. Among their product offerings were the models 6H128-08 and 6H129-08, which were designed to meet the needs of demanding networking environments.

The 6H128-08 is an Ethernet hub that supports up to 128 ports. This model is particularly recognized for its reliability and performance in connecting numerous devices within a local area network. One of the main features of the 6H128-08 is its support for both 10BASE-T and 100BASE-TX Ethernet standards, allowing it to handle varying data transmission speeds and ensuring compatibility with older and newer devices. This dual support features made it particularly appealing for businesses transitioning from older network technologies to faster Ethernet connections.

In terms of technology, the 6H128-08 leverages a centralized architecture which reduces network collision domains. This design contributes to improved network performance by allowing simultaneous data transmission from multiple devices. The hub features a range of LEDs that provide real-time status updates on port connectivity and data transmission activity. This allows network administrators to easily monitor and troubleshoot connectivity issues.

The 6H129-08 is often paired with the 6H128-08, functioning effectively as an additional port expander or in cascading configurations. This model also supports 128 ports and offers identical compatibility with the Ethernet standards mentioned, ensuring seamless integration in larger network setups. An important characteristic of the 6H129-08 is its enhanced fault tolerance, which is vital in mission-critical environments where network downtime must be minimized.

Both models are equipped with various management features, enabling network administrators to configure settings and optimize performance easily. The ability to use SNMP for network management supports monitoring and managing the entire network from centralized software applications.

Overall, the Cabletron Systems 6H128-08 and 6H129-08 stand out for their robust performance, extensive port capabilities, and compatibility with multiple Ethernet standards, making them suitable for enterprises looking to build or expand their networking infrastructure. These products reflect Cabletron's commitment to reliability and innovation in the field of networking hardware.