Bridging

SONET Port Configuration

The FE100-Sx series of Fast Ethernet Port Interface Modules and the APIM-2x series of ATM Port Interface Modules provide SONET (Synchronous Optical Network) access for some of CabletronÕs devices.

The FE100-Sx Port Interface Modules and the APIM-2x Port Interface Modules link high-speed local or metropolitan area networks by using an OC-3 connection (leased from your local telco or Internet service provider) to a SONET ring.

If your device is equipped with an FE100-Sx or an APIM-2x port interface module, you can use the SONET/SDH ConÞguration window to set its operating parameters, and the SONET/SDH Statistics window to view performance information for the interface (which can tell you if your telco/service provider is meeting any guarantees regarding network reliability).

SONET/SDH Configuration

The SONET/SDH ConÞguration window lets you determine whether your FE-100Sx or APIM-2x port interface module will operate according to SONET or SDH (Synchronous Digital Hierarchy) standards.

SONET is the ANSI (American National Standards Institute) standard for the optical transport of data according to the transmission standards in effect in North America (United States/Canada), Korea, Taiwan, and Hong Kong. ANSI sets industry standards in the U.S. for the telecommunications industry, among other industries.

The basic SONET building block signal (transmitted at 51.84 Mbps) is referred to as STS-1 (Synchronous Transport Signal Level 1). SONET can multiplex (or combine) STS-1 signals into STS-N signals, where N is some integer multiple of STS-1 signals.

The ITU, or International Telecommunications Union (formerly known as the CCITTÑthe Consultative Committee on International Telegraph and Telephone) incorporated the SONET standard into its Synchronous Digital Hierarchy (SDH) recommendations, which address differences between the European and North American transmission standards. The ITU sets standards for international communications (except for nations adhering to ANSI standards). SDH is a world standard, and as such, the SONET standard is considered a subset within it.

The SDH transmission hierarchy uses the STM-1 (Synchronous Transfer Module Level 1) as its basic building block signal (transmitted at 155.52 Mbps). Again, there are STM-N signals, which are STM-1 signals that have been multiplexed into a higher signaling rate.

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SONET Port Configuration

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Cabletron Systems CSX400, CSX200 manual Sonet Port Configuration, SONET/SDH Configuration
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CSX200, CSX400 specifications

Cabletron Systems was a leading developer of networking solutions, and its CSX400 and CSX200 series of high-performance switches represent some of the key innovations in the field of enterprise networking during their time. Both models were geared towards enhancing network reliability, efficiency, and speed, particularly in environments where heavy data traffic and complex networking demands were prevalent.

The CSX400, designed for larger enterprises, boasts a robust architecture capable of handling significant throughput. One of its standout features is its stackable design, allowing multiple switches to be interconnected and managed seamlessly as a single unit. This scalability provides organizations with the flexibility to expand their networks without significant infrastructure overhauls. The CSX400 supports various Ethernet standards, including 10/100 Ethernet and Gigabit Ethernet, positioning it to effectively manage both legacy and modern networking requirements.

In addition to its scalability, the CSX400 is distinguished by its advanced Layer 2 and Layer 3 routing capabilities. This dual-layer functionality enables efficient data handling and is instrumental in managing traffic between different network segments. Moreover, the switch incorporates features like VLAN (Virtual Local Area Network) support and Quality of Service (QoS) prioritization, allowing for enhanced performance of critical applications and streamlined bandwidth allocation.

On the other hand, the CSX200 series is tailored for smaller enterprises or branch offices needing a reliable yet efficient networking solution. Despite its compact design, the CSX200 is equipped with essential features that promote effective network management and security. It offers a simplified management interface, making it user-friendly for network administrators. The switch also provides essential access control measures, employing technologies like IEEE 802.1X for network access security.

Both the CSX400 and CSX200 prioritize performance through the incorporation of advanced switching technologies. They support features such as Spanning Tree Protocol (STP), enabling loop-free topologies and enhanced network resilience. These attributes are particularly crucial in dynamic networking environments where downtime can have significant repercussions on business operations.

Overall, Cabletron Systems' CSX400 and CSX200 series represent a blend of scalability, advanced routing capabilities, and user-friendly management, making them vital assets for organizations looking to optimize their network infrastructure during a period of rapid technological evolution. With their rich feature sets and unwavering performance, these switches helped pave the way for modern networking solutions that cater to diverse enterprise needs.
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