PU Subscriber Parameters

Disable Request Disconnect

prevents (if enabled) the HPAD from sending a Disconnect Request to the host if the HPAD–TPAD connection is broken.

LPDA Support

specifies the version (if any) of Link Problem Determination Aid that can be used by a host program (e.g., NetView or VTAM) or controller program (e.g., NCP) to test status and to control the line and remote interface. Configurable values are: 0 (None), 1 (Version 1), and 2 (Version 2).

Idle Fill Character

specifies a character that will be inserted into the stream when the SNA link is idle.

Inactivity Timer

determines how long the SmartSwitch 1800 will wait with no activity on the HPAD port before it will declare the port down.

L1-Duplex

determines level-1 signal operation on RS-232 ports. If Full, RTS, CTS, DCD are always high (and are raised by the appropriate side). If Half:

●When the DTE is ready to transmit, it asserts RTS, waits for CTS to become high, then starts transmitting. When transmission is finished, the DTE drops RTS (and the DCE should drop CTS). DCD is low during this period.

●When the DCE is ready to transmit, it checks to see that RTS and CTS are not high, then it raises DCD and starts transmitting. When transmission is done, the DCE drops DCD. RTS and CTS are low during this period.

For both Full and Half L1-Duplex, the DTE raises DTR and the DCE raises

DSR. The link is considered up when both DTR and DSR are high.

Make sure this parameter is configured correectly, or the PU will not become active.

PU Name

identifies the PU to an SNMP or NetView host.

Local Subscriber ID

identifies the local device. A Subscriber ID record (see page 9-14)must also be con- figured for this ID.

Remote Subscriber ID

identifies the remote device. A Subscriber ID record (see page 9-14)must also be con- figured for this ID.

If the PU is one end of a connection to a logical X.25 port in the SmartSwitch, this address must match a Subscriber ID configured for the logical port.

9-10	SmartSwitch 1800 4. 0 User Guide, Rev 01

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.

Cabletron Systems 1800 manual PU Subscriber Parameters

Models: 1800