02, Echo

provides for characters received from the user's device to be transmitted back to the device as well as being interpreted by the PAD.

03, Data Forwarding Char

allows the selection of defined sets of characters received from the user's device to be recognized by the PAD as an indication to complete the assembly and forward a com- plete packet sequence as defined in Recommendation X.25. Values (can be added) are:

0 = no data forwarding character.

1 = alphanumeric characters (A-Z, a-z, 0-9).

4 = ESC, BEL, ENQ, or ACK.

8 = DEL, CAN, or DC2.

16 = ETX or EOT.

32 = HT, LF, VT, or FF.

64 = all characters in columns 0 & 1 of International Alphabet #5 that are not included above. (The contents of columns 0 & 1 are equivalent to ASCII characters NUL through US in the table in Appendix E.)

127 = all characters.

04, Idle Timer Delay

allows selection of an interval between successive characters received from the user's device, which when exceeded will cause the PAD to terminate assembly of a packet and forward it as defined in Recommendation X.25. If expiration of the timer occurs before the forwarding size of the data packet is reached, the PAD forwards the data packet to the remote DTE.

05, Ancillary Device Control

allows flow control between the PAD and the user's device. The PAD indicates whether it is ready to accept characters from the user device by transmitting special characters that are used to switch DTE transmission on and off.

0 = no use of XON/XOFF.

1 = use XON/XOFF in data transfer.

2 = always use XON/XOFF.

06, PAD Service Signal

provides the user's device with the ability to specify whether or not, and in what format, PAD service signals are transmitted. Values (can be added) are:

0 = no service signals will be transmitted.

1 = service signals will be transmitted in standard format.

4 = prompt signal will be transmitted in standard format (asterisk).

5 = service and prompt signals will be transmitted in standard format.

Some common service signals are listed in Appendix A.

07, Receive Break Signal

allows the selection of the operation of the PAD after receipt of a break signal from the user's device.Values (can be added) are:

0 = no action.

1 = PAD will send an interrupt packet to the remote end but will remain in data transfer mode.

2 = PAD will reset the virtual call and remain in data transfer mode.

12-4

SmartSwitch 1800 4. 0 User Guide, Rev 01

Page 181 Page 183
Page 182
Image 182
Cabletron Systems 1800 manual 02, Echo
Page 181 Page 183

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.
Top Page Image Contents