Data Transfer

Appendix A

Async Terminal Operations

Before establishing an end-to-end link, an async terminal must make a connection to the async PAD, as follows:

1.Once the SmartSwitch 1800, async terminal, and any modems in the link are powered on, do this at the terminal:

●If a specific line speed is configured in the Port record, go to step 2.

●If the async PAD port is configured (in the Port record) for autobaud and parity auto-detect, press [Enter], then [.], then [Enter].

●If the port is configured for autobaud only, press [Enter] .

Data bits and parity settings must match throughout an async connection.

2.If the port is configured (in the Port record) to not require login, go to step 3. If login is required, enter (when prompted) the login password defined in the Async PAD Login record (described on page 12-7).

3.The Async PAD banner (described on page A-5) will be displayed at the top of the terminal screen. The terminal is now in Command mode, described in the next paragraph.

Command and Data Transfer Modes

The async terminal has two modes of operation. Local operations at the async terminal are performed in Command mode. In Data Transfer mode, the PAD interprets all input from the terminal as data, and transmits it to the remote device.

If this is a PVC connection, you can enter Data Transfer mode from Command mode by entering the PAD recall character specified in the Async PAD profile. If this is an

SVC connection, you must send a Call Request packet to entermode. (See “ Placing a Call from an Async Terminal” on page A-2.)Either way, once in Data Transfer mode, you can toggle back and forth between the two modes by entering the PAD recall character.

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Cabletron Systems 1800 manual Appendix a Async Terminal Operations, Command and Data Transfer Modes
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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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