4 = PAD will send an indication of a Break message to the remote end and remain in data transfer mode.

8 = PAD will escape from data transfer mode and enter command mode. 16 = PAD will discard output.

08, Discard Output

allows a PAD to discard the contents of user sequences in packets on request, rather than disassembling and transmitting these to the user's device.

09, Padding After <cr>

determines how many (if any) NULL padding characters will be added after a carriage return character.

10, Line Folding

provides for automatic insertion of appropriate format "effectors" in the character stream transmitted to the user's device. The number indicates maximum characters per line.

11, Speed

is either the X.3 Line Speed specified in Port configuration or, if autobaud was spec- ified, the speed of the async device connected to the port. The speed cannot be changed in the PAD Profile record.

12, Flow Control

allows XON/XOFF from the user's device to control the rate of data transfer from the PAD.

13, Insert <lf> after <cr>

causes a linefeed to be inserted after a carriage return in the specified instances. Values (can be added) are:

0 = none.

1 = after CR in transmission to the DTE.

2 = after CR in return from the DTE.

4 = after CR in echo to the DTE.

14, Padding after <lf>

determines how many (if any) NULL padding characters will be added after a linefeed.

15, Editing

provides for character delete, line delete, and line display editing capabilities in the PAD command state and data transfer state for the user's device. If editing is enabled, the PAD will suspend forwarding of data packets after expiration of the idle timer or if the editing buffer is full.

16, Character Delete

is the ASCII value of the character that is used to delete characters. When this char- acter is received by the PAD, it will be stored in the editing buffer, and will cause the previously stored character to be deleted at packet forwarding or if a line display is performed.

Configuring Async Ports

12-5

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Cabletron Systems 1800 manual 08, Discard Output
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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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