Telephony Interface

This section describes the telephone interfaces th 1800, and provides additional information the E&M interface.

are supported by the SmartSwitch e line signaling standards and the

Telephone Interfaces

The Smart witch 1800 supports three types of telephone interfaces: OPX, SLT and E&M. Figure C-4shows the different types of telephone interfaces that are supported by SmartSwitch 1800s.

Figure C-4 Trunk and Station Connection

OPX and SLT refer to two-wire circuits. Two-wire, loop-start circuits are the most common, and are used by PSTNs, PBXs or KSUs throughout the world. A typical home telephone connection to the telephone company is an example of a two-wire, loop-start circuit. The E&M interface can use a two- or four-wire circuit. AC15 is a four-wire signaling system used by PBXs to communicate with each other and other PBX-like communications equipment. The following paragraphs describe the OPX, SLT, E&M and AC15 interfaces.

OPX Connections

OPX (Off Premise Exchange) is a two-wire telephone communication mode. In this mode, the SmartSwitch 1800 presents a telco/PTT interface similar to a Central Office interface. When configured in this mode, a SmartSwitch 1800 can interface to a con- ventional two-wire telephone (pulse-dial or touch-tone). A SmartSwitch 1800 in OPX mode can also be connected to a two-wire CO trunk of a PBX or KSU. In OPX, the SmartSwitch 1800 provides loop current and ring voltage similar to a telephone company's Central Office. It also detects off-hook and on-hook states, and generates ring voltage.

Voice Configuration Reference Information

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Cabletron Systems 1800 manual Telephony Interface, Telephone Interfaces, OPX Connections
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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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