SLT Connections

SLT (Single Line Telephone) is a two-wire telephone communication mode. In this mode, the SmartSwitch 1800 presents a telco/PTT interface which looks like a standard telephone set. The SmartSwitch 1800 can be connected to analog station ports (extensions) of a PBX. The SLT option provides the appearance of a two-wire telephone in a loop-start circuit. An SLT-configured voice port on a SmartSwitch 1800 detects ring voltage and closes the loop during off-hook and opens the loop in an on-hook condition.

E&M Connections

E&M is a communication mode used in PBX-to-PBX communications as shown in the following illustration.

Figure C-5 Inter-PBX Trunking

This type of interface uses a two-wire or four-wire voice circuit plus up to four wires for E&M signaling. In this mode, the SmartSwitch 1800 offers an interconnection path between two PBXs.

PBX E&M tie-line connections usually require multi-conductor dedicated circuits to support full-duplex voice and separate signaling lines. Typically, eight wires are required: four for voice (two wires in each direction) and four for E&M signaling. A few PBXs use two wires (one pair) for bi-directional voice. The SmartSwitch 1800 can interface with either of these circuits.

The E&M interface is designed to connect with that of a PBX tie line port, and provide appropriate end-to-end signaling support for a variety of applications. The system generates the "E" signal to the PBX in response to an inbound signal at the remote unit. That signal depends on the application of the remote unit. The local unit will generate the "E" signal in the following applications:

●The remote unit is configured for E&M signaling, and detects an active "M" signal.

●The remote unit uses the OPX option, and detects an off hook condition on its two-wire loop-start circuit.

●The remote unit uses the SLT option, and detects a ring signal on its two-wire loop-start circuit.

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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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