DTE

stands for “data terminal equipment,” which is the device at either end of a user-to- network communications path. “Physical DTE” refers to the hardware configuration, and “Logical DTE” refers to the software configuration. Note that physical and logical DTE are independent of each other; however, for each, if one end of the connection is DCE, the other must be DTE, and vice versa.

DTMF

stands for Dual Tone Multi Frequency signaling, which is the method commonly used to send tones using push buttons on touch tone phones (as opposed to pulse dialing).

E

E&M

is the type of interface used for PBX tie-trunk connections. When configured for this option, the SmartSwitch 1800 acts like the trunk side of a PBX.

En capsulation

is the process whereby one protocol layer receives a message from a higher layer and attached a header to the message for transmission to the next lower layer or out over the network.

Ethernet

is a LAN technology defined by IEEE standard 802.3, which supports CSMA/CD (carrier sense multiple access/collision detection) protocol.

Event

is a change in status in software or hardware operation (e.g., configuration, function, operating state, performance, etc.), that is reported to automatic and specified destina- tions within the network the SmartSwitch 1800 is on. This term is synonymous with “alarm.”

F

Four-wire

is a voice circuit with a separate pair of wires for inbound and outbound signals.

Fragment

is an IP datagram that is a piece of a larger datagram, the larger one having been seg- mented to allow it to pass through a network that did not support the larger datagram. (See “Fragmentation.”)

Fragmentation

is the breaking up of IP datagrams into smaller segments, to allow the datagrams to pass through a network that does not support the full size. If IP fragments the data- grams, they will be reassembled at the final destination; if another protocol fragments them (for example, to pass through an X.25 network), they will be reassembled at the other side of that network.

Frame

is a unit of data transmitted between OSI level 2 entities, and containing its own control information for addressing and error checking.

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SmartSwitch 1800 4. 0 User Guide, Rev 01

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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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