INSTALLATION REQUIREMENTS/ SPECIFICATIONS

FRONT PANEL INDICATORS

ON LINE

When lit, this LED indicates the two port

 

bridge is on line and operational (green

 

indicator).

STAND BY

When lit, this LED indicates the bridge is not

 

forwarding packets (yellow indicator).

NOTE: There is one TRANSMIT, RECEIVE, COLLISION, and POK (Port OK) LED for each segment. The LEDs for RECEIVE, TRANSMIT and COLLISION are pulsed-stretched for increased viewing effect.

XMT (transmit)

When lit, this LED indicates the bridge is

 

transmitting packets to that segment (green

 

indictor).

RCV (receive)

When lit, this LED indicates that the bridge

 

is receiving data packets from that segment

 

(yellow indicator).

CP (collision present)

When lit, this LED indicates that a collision

 

is occurring on that segment (red indicator).

POK (port ok)

When lit, this LED indicates transceiver

 

connected, port has passed Loop Back Test

 

and is ready for transmission (green

 

indicator).

FRONT PANEL SWITCHES

FORWARD BROADCAST / O When this switch is on (), it allows the bridge to forward broadcast messages.

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Cabletron Systems NB25 E, NB20E user manual Front Panel Indicators, Front Panel Switches

NB25 E, NB20E specifications

Cabletron Systems, renowned for its innovative networking solutions in the late 20th century, introduced the NB20E and NB25E series, which made a significant impact in the realm of network management and reliability. These devices were tailored for businesses seeking to enhance their network infrastructure with efficiency and reliability.

The NB20E is known for its robust performance in medium-sized network environments. It operates with an architecture that allows for seamless integration into existing networks, providing essential features that cater to both versatility and scalability. One of its standout functionalities is the support for multiple protocols, enabling organizations to harness various networking standards without the need for extensive alterations to their current setups.

On the other hand, the NB25E extends these capabilities further, offering enhanced throughput and a more comprehensive range of networking options. This makes it particularly suitable for larger businesses with growing networking demands. The utilization of advanced technologies, such as its embedded intelligence, ensures that the NB25E can efficiently manage and direct network traffic, thus minimizing latency and maintaining optimal performance even during peak usage times.

Both models provide essential characteristics such as a modular design, allowing for easy upgrades and maintenance. This modularity not only prolongs the lifespan of the devices but also provides flexibility for future expansions or modifications as business needs evolve. The systems support various interfaces, catering to diverse environments and ensuring easy connectivity to other networking equipment.

Security is a paramount concern in today’s interconnected world, and Cabletron Systems addressed this in the NB20E and NB25E series. The devices are equipped with advanced security features that protect against unauthorized access and ensure data integrity, providing peace of mind for organizations relying on critical data transmissions.

In addition to their technical advantages, both models offer user-friendly management software, making monitoring and control straightforward even for those with limited networking expertise. This ease of use ensures that companies can leverage their investment fully without requiring extensive training or resources.

In summary, the Cabletron Systems NB20E and NB25E series represent a significant leap in networking technology during their era. With advanced features, modular capabilities, and a commitment to security, these devices remain a noteworthy consideration for businesses looking to enhance their networks and prepare for future growth.