Closed User Group Parameters

The Closed User Group (CUG) function is an X.25 privacy feature that allows cre- ation of up to 100 groups of users per port . Members of a CUG can communicate with other members, but access to and from network users outside that CUG may be denied (determined by Outgoing Access Allowed and Incoming Access Allowed). The CUG index number is included in call packets, and is cross-referenced with the CUG Index in the SmartSwitch software.

Preferential CUG Flag

specifies whether the port has a preferential CUG if the port belongs to any CUGs.

Preferential CUG

is a default CUG for the port. Any calls that do not specify a CUG will default to this one if Preferential CUG Flag is Y. A new port has CUG 0 specified here.

Incoming Access Allowed

determines whether this port will be allowed to receive calls from outside its CUGs.

Outgoing Access Allowed

determines whether this port will be allowed to make calls outside its CUGs.

Add/Change CUG

To configure a CUG, select this entry and, when prompted, enter:

●CUG Index, 0-99(the default is 0), which is a reference to the CUG.

●CUG number, 1-16383(the default is 1), that will be associated with the index.

●any other requested information. (See Table 8-1on page 8-6.)

Display All CUGs

Selecting this item will display a list of all configured CUGs.

Delete CUG

To delete a CUG, select this item and enter the index (see "Add/Change CUG") of the CUG to be deleted.

Configuring X.25

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Cabletron Systems 1800 manual Closed User Group Parameters
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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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