PAD

stands for “packet assembler/disassembler,” which allows a non-X.25 device to access a SmartSwitch 1800, by converting its protocol to the X.25 packet mode protocol, and vice versa. SmartSwitch 1800 supports integral async, SNA, and BSC PADs.

PBX

stands for Private Branch Exchange, and refers to a small private telephone switch.

PDN

stands for “public data network,” which is a network operated by common carriers or telecommunications administrations for the purpose of providing data transmission capabilities to the public.

Physical DCE/DTE

see “DCE” and “DTE.”

Port

is the entry or exit point for node traffic.

Protocol

is an agreement on format, meaning, and relative timing of information exchanged between two communications devices.

PU

stands for “physical unit,” which is an IBM referenced to any SNA host or terminal device.

Public Data Network

see “PDN.”

PVC

stands for “permanent virtual circuit,” which is a permanent logical connection between two subscribers, analogous to a leased line. Transmission of packets on a PVC needs no call setup or call clearing.

Q

QLLC

is “Qualified Logical Link Control,” which is a method of encapsulating SNA traffic for transmission over X.25.

R

RIP

stands for “routing information protocol,” which provides for dynamic routing in a TCP/IP implementation.

Root

is the bridge determined (by implementation of the spanning tree algorithm) to be the lowest-cost path between points in a bridged link.

glo-8

SmartSwitch 1800 4. 0 User Guide, Rev 01

Page 433 Page 435
Page 434
Image 434
Cabletron Systems 1800 manual Is the entry or exit point for node traffic
Page 433 Page 435

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