SSAP

stands for “source service access point,” which is the address of the link service access point (LSAP) from which a link protocol data unit (LPDU) originates.

Su bscrib er

is a user of the SmartSwitch 1800 device. Subscriber IDs are the called and calling addresses used in X.25 call setup.

SVC

stands for “switched virtual circuit,” which is a temporary logical association between two subscribers connected to a network, analogous to connection by a dial-up line.

T

TCP

stands for “transmission control protocol,” which is the Internet standard transport layer protocol.

Throughput Class

(sometimes abbreviated “thruput” class) reflects the line speed in bits per second.

Token Ring

is a MAC (see that entry) technique for data transmission that uses a “ring” configu- ration of stations, and a “token” that is passed around the ring until taken by a station, which inserts a packet, then retransmits the token.

TPAD

is an integral (to a SmartSwitch 1800) SNA or BSC PAD connected to a terminal.

Trunk

is a physical or logical link between nodes.

Two-wire

is a circuit that uses the same two wires for both inbound and outbound signals.

V

V.35

is a CCITT standard defining a physical and electrical interface that is typically used by high-speed digital carriers.

Virtual circuit

is an independent logical path between two subscribers of a packet switching network, established for the purpose of exchanging data.

VTAM

stands for IBM’s “virtual telecommunications access method.”

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SmartSwitch 1800 4. 0 User Guide, Rev 01

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Cabletron Systems 1800 manual Is a physical or logical link between nodes
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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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